74HC(T)123 Datasheet by NXP USA Inc.

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1. General description
The 74HC123; 74HCT123 are high-speed Si-gate CMOS devices and are pin compatible
with Low-power Schottky TTL (LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC123; 74HCT123 are dual retriggerable monostable multivibrators with output
pulse width control by three methods:
1. The basic pulse is programmed by selection of an external resistor (REXT) and
capacitor (CEXT).
2. Once triggered, the basic output pulse width may be extended by retriggering the
gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB). By
repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made
as long as desired. Alternatively an output delay can be terminated at any time by a
LOW-going edge on input nRD, which also inhibits the triggering.
3. An internal connection from nRD to the input gates makes it possible to trigger the
circuit by a HIGH-going signal at input nRD as shown in Table 3.
Schmitt-trigger action in the nA and nB inputs, makes the circuit highly tolerant to slower
input rise and fall times.
The 74HC123; 74HCT123 are identical to the 74HC423; 74HCT423 but can be triggered
via the reset input.
2. Features and benefits
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output pulse
Schmitt-trigger action on all inputs except for the reset input
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Specified from 40 Cto+85C and from 40 Cto+125C
74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Rev. 10 — 3 December 2015 Product data sheet
ommm a Wm; a v 1m7 NI mi Immfl
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 2 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
3. Ordering information
4. Functional diagram
Table 1. Ordering information
Type number Package
Temperature range Name Description Version
74HC123D 40 C to +125 C SO16 plastic small outline package; 16 leads;
body width 3.9 mm SOT109-1
74HCT123D
74HC123DB 40 C to +125 C SSOP16 plastic shrink small outline package; 16 leads;
body width 5.3 mm SOT338-1
74HCT123DB
74HC123PW 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm SOT403-1
74HCT123PW
74HC123BQ 40 C to +125 C DHVQFN16 plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5 3.5 0.85 mm
SOT763-1
Fig 1. Functional diagram
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 3 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Fig 2. Logic symbol Fig 3. IEC logic symbol
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 4 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
5. Pinning information
5.1 Pinning
5.2 Pin description
(1) This is not a supply pin. The substrate is attached to this
pad using conductive die attach material. There is no
electrical or mechanical requirement to solder this pad.
However, if it is soldered, the solder land should remain
floating or be connected to VCC.
Fig 5. Pin configuration for SO16, SSOP16 and
TSSOP16 Fig 6. Pin configuration for DHVQFN16
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Table 2. Pin description
Symbol Pin Description
1A 1 negative-edge triggered input 1
1B 2 positive-edge triggered input 1
1RD 3 direct reset LOW and positive-edge triggered input 1
1Q 4 active LOW output 1
2Q 5 active HIGH output 2
2CEXT 6 external capacitor connection 2
2REXT/CEXT 7 external resistor and capacitor connection 2
GND 8 ground (0 V)
2A 9 negative-edge triggered input 2
2B 10 positive-edge triggered input 2
2RD 11 direct reset LOW and positive-edge triggered input 2
2Q 12 active LOW output 2
1Q 13 active HIGH output 1
1CEXT 14 external capacitor connection 1
1REXT/CEXT 15 external resistor and capacitor connection 1
VCC 16 supply voltage
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 5 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
6. Functional description
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; = LOW-to-HIGH transition; = HIGH-to-LOW transition;
= one HIGH level output pulse; = one LOW level output pulse.
[2] If the monostable was triggered before this condition was established, the pulse will continue as programmed.
7. Limiting values
[1] For SO16 package: Ptot derates linearly with 8 mW/K above 70 C.
[2] For SSOP16 and TSSOP16 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
[3] For DHVQFN16 package: Ptot derates linearly with 4.5 mW/K above 60 C.
Table 3. Function table[1]
Input Output
nRD nA nB nQ nQ
LXXLH
XHXL
[2] H[2]
XXLL
[2] H[2]
HL
HH
LH
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Max Unit
VCC supply voltage 0.5 +7 V
IIK input clamping current VI < 0.5 V or VI>V
CC + 0.5 V - 20 mA
IOK output clamping current VO<0.5 V or VO > VCC + 0.5 V - 20 mA
IOoutput current except for pins nREXT/CEXT;
VO=0.5 V to (VCC +0.5V) -25 mA
ICC supply current -50mA
IGND ground current - 50 mA
Tstg storage temperature 65 +150 C
Ptot total power dissipation SO16 package [1] -500mW
SSOP16 package [2] -500mW
TSSOP16 package [2] -500mW
DHVQFN16 package [3] -500mW
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 6 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
8. Recommended operating conditions
9. Static characteristics
Table 5. Recommended operating conditions
Symbol Parameter Conditions 74HC123 74HCT123 Unit
Min Typ Max Min Typ Max
VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V
VIinput voltage 0 - VCC 0-V
CC V
VOoutput voltage 0 - VCC 0-V
CC V
t/V input transition rise and
fall rate nRD input
VCC = 2.0 V - - 625 - - - ns/V
VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V
VCC = 6.0 V - - 83 - - - ns/V
Tamb ambient temperature 40 +25 +125 40 +25 +125 C
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
74HC123
VIH HIGH-level
input voltage VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V
VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V
VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V
VIL LOW-level
input voltage VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V
VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V
VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V
VOH HIGH-level
output voltage VI=V
IH or VIL
IO=20 A; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V
IO=20 A; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V
IO=20 A; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V
IO=4mA; V
CC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V
IO=5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V
VOL LOW-level
output voltage VI=V
IH or VIL
IO=20A; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V
IO=20A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V
IO=20A; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V
IO=4mA; V
CC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V
IO= 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V
IIinput leakage
current VI=V
CC or GND; VCC =6.0V - - 0.1 - 1.0 - 1.0 A
ICC supply current VI=V
CC or GND; IO=0A;
VCC =6.0V - - 8.0 - 80 - 160 A
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 7 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
CIinput
capacitance -3.5- - - - - pF
74HCT123
VIH HIGH-level
input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V
VIL LOW-level
input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V
VOH HIGH-level
output voltage VI=V
IH or VIL; VCC =4.5V
IO=20 A 4.4 4.5 - 4.4 - 4.4 - V
IO=4 mA 3.98 4.32 - 3.84 - 3.7 - V
VOL LOW-level
output voltage VI=V
IH or VIL; VCC =4.5V
IO=20A - 0 0.1 - 0.1 - 0.1 V
IO= 4.0 mA - 0.15 0.26 - 0.33 - 0.4 V
IIinput leakage
current VI=V
CC or GND; VCC =5.5V - - 0.1 - 1.0 - 1.0 A
ICC supply current VI=V
CC or GND; IO=0A;
VCC =5.5V - - 8.0 - 80 - 160 A
ICC additional
supply current per input pin; IO=0A;
VI=V
CC 2.1 V;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V
pins nA, nB - 35 125 - 160 - 170 A
pin nRD - 50 180 - 225 - 245 A
CIinput
capacitance -3.5- - - - - pF
Table 6. Static characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 8 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); CL= 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
74HC123
tpd propagation
delay nRD, nA, nB to nQ or nQ;
CEXT = 0 pF;
REXT =5k;
see Figure 9
[1]
VCC = 2.0 V - 83 255 - 320 - 385 ns
VCC = 4.5 V - 30 51 - 64 - 77 ns
VCC = 5 V; CL = 15 pF - 26 - - - - - ns
VCC = 6.0 V - 24 43 - 54 - 65 ns
nRD (reset) to nQ or nQ;
CEXT =0pF;
REXT =5k;
see Figure 9
VCC = 2.0 V - 66 215 - 270 - 325 ns
VCC = 4.5 V - 24 43 - 54 - 65 ns
VCC = 5 V; CL = 15 pF - 20 - - - - - ns
VCC = 6.0 V - 19 37 - 46 - 55 ns
tttransition time see Figure 9 [1]
VCC = 2.0 V - 19 75 - 95 - 110 ns
VCC = 4.5 V - 7 15 - 19 - 22 ns
VCC = 6.0 V - 6 13 - 16 - 19 ns
tWpulse width nA LOW; see Figure 10
VCC = 2.0 V 100 8 - 125 - 150 - ns
VCC = 4.5 V 20 3 - 25 - 30 - ns
VCC = 6.0 V 17 2 - 21 - 26 - ns
nB HIGH; see Figure 10
VCC = 2.0 V 100 17 - 125 - 150 - ns
VCC = 4.5 V 20 6 - 25 - 30 - ns
VCC = 6.0 V 17 5 - 21 - 26 - ns
nRD LOW; see Figure 11
VCC = 2.0 V 100 14 - 125 - 150 - ns
VCC = 4.5 V 20 5 - 25 - 30 - ns
VCC = 6.0 V 17 4 - 21 - 26 - ns
nQ HIGH and nQ LOW;
VCC =5.0V;
see Figure 10 and 11
[2]
CEXT = 100 nF;
REXT = 10 k
-450- - - - - s
CEXT = 0 pF;
REXT =5k
-75- - - - -ns
Figure 12 Figure 10 Figure 7 s Figure 7 Figure 9 Figure 9 Figure 9 Figure 9 e Figure 9 17mm av 1m7 Alnmlimmfl
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 9 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
trtrig retrigger time nA,nB; C
EXT = 0 pF;
REXT = 5 k; VCC = 5.0 V;
see Figure 10
[3][4] -110- - - - - ns
REXT external timing
resistor see Figure 7
VCC = 2.0 V 10 - 1000 - - - - k
VCC = 5.0 V 2 - 1000 - - - - k
CEXT external timing
capacitor VCC = 5.0 V; see Figure 7 [4] --- - - - -pF
CPD power
dissipation
capacitance
per monostable;
VI= GND to VCC
[5] -54- - - - -pF
74HCT123
tPHL HIGH to LOW
propagation
delay
nRD, nA, nB to nQ or nQ;
CEXT = 0 pF; REXT =
5k; see Figure 9
VCC = 4.5 V - 30 51 - 64 - 77 ns
VCC = 5 V; CL=15pF - 26 - - - - - ns
nRD (reset) to nQ or nQ;
CEXT =0pF;
REXT =5k;
see Figure 9
VCC = 4.5 V - 27 46 - 58 - 69 ns
VCC = 5 V; CL=15pF - 23 - - - - - ns
tPLH LOW to HIGH
propagation
delay
nRD, nA, nB to nQ or nQ;
CEXT = 0 pF;
REXT =5k;
see Figure 9
VCC = 4.5 V - 28 51 - 64 - 77 ns
VCC = 5 V; CL=15pF - 26 - - - - - ns
nRD (reset) to nQ or nQ;
CEXT =0pF; R
EXT =
5k; see Figure 9
VCC = 4.5 V - 23 46 - 58 - 69 ns
VCC = 5 V; CL=15pF - 23 - - - - - ns
tttransition time VCC = 4.5 V; see Figure 9 [1] - 7 15 - 19 - 22 ns
Table 7. Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); CL= 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 10 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
[1] tpd is the same as tPHL and tPLH; tt is the same as tTHL and tTLH
[2] For other REXT and CEXT combinations see Figure 7. If CEXT > 10 nF, the next formula is valid.
tW=KREXT CEXT, where:
tW= typical output pulse width in ns;
REXT = external resistor in k;
CEXT = external capacitor in pF;
K = constant = 0.45 for VCC = 5.0 V and 0.55 for VCC =2.0V.
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is approximately 7 pF.
[3] The time to retrigger the monostable multivibrator depends on the values of REXT and CEXT. The output pulse width will only be
extended when the time between the active-going edges of the trigger input pulses meets the minimum retrigger time. If CEXT >10 pF,
the next formula (at VCC = 5.0 V) for the setup time of a retrigger pulse is valid:
trtrig = 30 + 0.19 REXT CEXT0.9 +13REXT1.05, where:
trtrig = retrigger time in ns;
CEXT = external capacitor in pF; REXT = external resistor in k.
The inherent test jig and pin capacitance at pins 15 and 7 (nREXT/CEXT) is 7 pF.
[4] When the device is powered-up, initiate the device via a reset pulse, when CEXT <50pF.
[5] CPD is used to determine the dynamic power dissipation (PD in W).
PD=C
PD VCC2fi+(CLVCC2fo) + 0.75 CEXT VCC2fo+D16 VCC where:
fi= input frequency in MHz;
fo= output frequency in MHz;
D = duty factor in %;
CL= output load capacitance in pF;
VCC = supply voltage in V;
CEXT = timing capacitance in pF;
(CLVCC2 fo) sum of outputs.
tWpulse width VCC = 4.5 V
nA LOW; see Figure 10 20 3 - 25 - 30 - ns
nB HIGH; see Figure 10 20 5 - 25 - 30 - ns
nRD LOW; see Figure 11 20 7 - 25 - 30 - ns
nQ HIGH and nQ LOW;
VCC =5.0V;
see Figure 10 and 11
[2]
CEXT = 100 nF;
REXT = 10 k
-450- - - - - s
CEXT = 0 pF;
REXT =5k
-75- - - - -ns
trtrig retrigger time nA,nB; C
EXT = 0 pF;
REXT = 5 k; VCC = 5.0 V;
see Figure 10
[3][4] -110- - - - - ns
REXT external timing
resistor VCC = 5.0 V; see Figure 7 2-1000- - - -k
CEXT external timing
capacitor VCC = 5.0 V; see Figure 7 [4] --- - - - -pF
CPD power
dissipation
capacitance
per monostable;
VI= GND to VCC 1.5 V
[5] -56- - - - -pF
Table 7. Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); CL= 50 pF unless otherwise specified; for test circuit see Figure 12.
Symbol Parameter Conditions 25 C40 C to +85 C40 C to +125 CUnit
Min Typ Max Min Max Min Max
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 11 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
VCC = 5.0 V; Tamb = 25 C.
(1) REXT = 100 k
(2) REXT = 50 k
(3) REXT = 10 k
(4) REXT = 2 k
CEXT = 10 nF; REXT = 10 k to 100 k.
Tamb = 25 C.
Fig 7. Typical output pulse width as a function of the
external capacitor value Fig 8. 74HC123 typical ‘K’ factor as function of VCC
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 12 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
11. Waveforms
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 9. Propagation delays from inputs (nA, nB, nRD) to outputs (nQ, nQ) and output transition times
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 13 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
nRD = HIGH
Fig 10. Output pulse control using retrigger pulse
nA = LOW
Fig 11. Output pulse control using reset input nRD
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 14 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Test data is given in Table 8.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch.
Fig 12. Test circuit for measuring switching times
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Type Input Load S1 position
VItr, tfCLRLtPHL, tPLH
74HC123 VCC 6 ns 15 pF, 50 pF 1 kopen
74HCT123 3 V 6 ns 15 pF, 50 pF 1 kopen
LL/ 0013,5954 n Figure 14 LL/ 001335513 a“. HiBV zuw Afluwhlsves-mfl
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 15 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
12. Application information
12.1 Timing component connections
The basic output pulse width is essentially determined by the values of the external timing
components REXT and CEXT.
12.2 Power-up considerations
When the monostable is powered-up it may produce an output pulse, with a pulse width
defined by the values of REXT and CEXT. This output pulse can be eliminated using the
circuit shown in Figure 14.
(1) For minimum noise generation it is recommended to ground pins 6 (2CEXT) and 14 (1CEXT)
externally to pin 8 (GND).
Fig 13. Timing component connections
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 16 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
12.3 Power-down considerations
A large capacitor CEXT may cause problems when powering-down the monostable due to
the energy stored in this capacitor. When a system containing this device is
powered-down or a rapid decrease of VCC to zero occurs, the monostable may sustain
damage, due to the capacitor discharging through the input protection diodes. To avoid
this possibility, use a damping diode (DEXT) preferably a germanium or Schottky type
diode able to withstand large current surges and connect as shown in Figure 15.
Fig 15. Power-down protection circuit
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 17 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
13. Package outline
Fig 16. Package outline SOT109-1 (SO16)
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 18 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Fig 17. Package outline SOT338-1 (SSOP16)
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 19 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Fig 18. Package outline SOT403-1 (TSSOP16)
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 20 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Fig 19. Package outline SOT763-1 (DHVQFN16)
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© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 21 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
14. Abbreviations
15. Revision history
Table 9. Abbreviations
Acronym Abbreviation
CMOS Complementary Metal Oxide Semiconductor
DUT Device Under Test
ESD ElectroStatic Discharge
HBM Human Body Model
LSTTL Low-power Schottky Transistor-Transistor Logic
MM Machine Model
Table 10. Revision history
Document ID Release date Data sheet status Change notice Supersedes
74HC_HCT123 v.10 20151203 Product data sheet - 74HC_HCT123 v.9
Modifications: Type numbers 74HC123N and 74HCT123N (SOT38-4) removed.
74HC_HCT123 v.9 20150119 Product data sheet - 74HC_HCT123 v.8
Modifications: Table 7: Power dissipation capacitance condition for 74HCT123 is corrected.
74HC_HCT123 v.8 20111216 Product data sheet - 74HC_HCT123 v.7
Modifications: Legal pages updated.
74HC_HCT123 v.7 20110825 Product data sheet - 74HC_HCT123 v.6
74HC_HCT123 v.6 20110314 Product data sheet - 74HC_HCT123 v.5
74HC_HCT123 v.5 20090713 Product data sheet - 74HC_HCT123 v.4
74HC_HCT123 v.4 20060616 Product data sheet - 74HC_HCT123 v.3
74HC_HCT123 v.3 20040511 Product specification - 74HC_HCT123_CNV v.2
74HC_HCT123_CNV v.2 19980708 Product specification - -
mum av 1m7 "mum“...
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 22 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
16. Legal information
16.1 Data sheet status
[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term ‘short data sheet’ is explained in section “Definitions”.
[3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nexperia.com.
16.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the Nexperia product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
16.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. Nexperia takes no
responsibility for the content in this document if provided by an information
source outside of Nexperia.
In no event shall Nexperia be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
Suitability for use — Nexperia products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of a Nexperia product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. Nexperia and its suppliers accept no liability for
inclusion and/or use of Nexperia products in such equipment or
applications and therefore such inclusion and/or use is at the customer’s own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Nexperia products, and Nexperia
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the Nexperia
product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
Nexperia does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using Nexperia
products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). Nexperia does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nexperia.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. Nexperia hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of Nexperia products by customer.
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Document status[1][2] Product status[3] Definition
Objective [short] data sheet Development This document contains data from the objective specification for product development.
Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
Product [short] data sheet Production This document contains the product specification.
http://wwwmexgeria salesaddresses®nexperia am"... av 1m7 umsmmu
© Nexperia B.V. 2017. All rights reserved
74HC_HCT123 All information provided in this document is subject to legal disclaimers.
Product data sheet Rev. 10 — 3 December 2015 23 of 24
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. Nexperia
accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without Nexperia’s warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
Nexperia’s specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies Nexperia for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond Nexperia’s
standard warranty and Nexperia’s product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
16.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
17. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Nexperia 74HC123; 74HCT123
Dual retriggerable monostable multivibrator with reset
18. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 2
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
6 Functional description . . . . . . . . . . . . . . . . . . . 5
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5
8 Recommended operating conditions. . . . . . . . 6
9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 6
10 Dynamic characteristics . . . . . . . . . . . . . . . . . . 8
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
12 Application information. . . . . . . . . . . . . . . . . . 15
12.1 Timing component connections . . . . . . . . . . . 15
12.2 Power-up considerations . . . . . . . . . . . . . . . . 15
12.3 Power-down considerations . . . . . . . . . . . . . . 16
13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 17
14 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 21
15 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 21
16 Legal information. . . . . . . . . . . . . . . . . . . . . . . 22
16.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 22
16.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
16.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
16.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
17 Contact information. . . . . . . . . . . . . . . . . . . . . 23
18 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
© Nexperia B.V. 2017. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release:
03 December 2015

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