STG3696E Datasheet by STMicroelectronics

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January 2011 Doc ID 18165 Rev 2 1/21
1
STG3696E
Low voltage dual SPDT switch for USB/audio signal switching
with 8 kV ESD protection
Features
Low distortion negative signal swing capability
for audio switch (range = VCC to VCC5.0 V)
Single supply operating voltage:
VCC = 2.7 V to 4.5 V
Typical bandwidth (–3 dB) of 950 MHz on all
channels
USB (2.0) high speed (480 Mbps) signal
switching compliant
Integrated fail safe function to protect against
short to 5.5 V
Internal shunt resistors for pop noise
suppression
Auto detection of VBUS for switch selection
Low RON resistance of 2.5 Ω (typ.)
Latch-up performance exceeds 100 mA per
JESD 78, Class II
ESD performance exceeds JESD22 (COM
pins to GND) ± 8 kV Human Body Model
(A114-A)
ESD performance exceeds JESD22 (other
pins) ± 2 kV Human Body Model (A114-A)
Applications
Mobile phones
MP3 and other personal media players
Table 1. Device summary
Order code Package Packing
STG3696EQTR QFN10
(1.8 mm x 1.4 mm) Tape and reel
QFN10 (1.8 mm x 1.4 mm)
www.st.com
Contents STG3696E
2/21 Doc ID 18165 Rev 2
Contents
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1 Overvoltage fault protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2 Negative charge pump for negative rail audio signaling . . . . . . . . . . . . . . . 9
5.3 VBUS detection feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.4 Pop noise suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9 Package marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
STG3696E List of tables
Doc ID 18165 Rev 2 3/21
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Truth table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 5. Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 6. DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 7. Mechanical data for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 15
Table 8. Device topside marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 9. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
List of figures STG3696E
4/21 Doc ID 18165 Rev 2
List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection (top through view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Package outline for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 14
Figure 6. Recommended footprint for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch. . . . . . . . . . . . . 15
Figure 7. Carrier tape for QFN10 (1.8 x 1.4 x 0.5 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 8. Reel information (front side) for QFN10 (1.8 x 1.4 x 0.5 mm). . . . . . . . . . . . . . . . . . . . . . . 17
Figure 9. Reel information (back view) for QFN10 (1.8 x 1.4 x 0.5 mm) . . . . . . . . . . . . . . . . . . . . . . 18
STG3696E Description
Doc ID 18165 Rev 2 5/21
1 Description
STG3696E is a high speed ESD protected dual SPDT (single pole dual throw) switch that
combines low distortion audio and accurate USB 2.0 high speed (480 Mbps) data signal
switching in the same device.
When the audio path is selected, the switch allows the audio signal to swing below ground
(up to VCC5.0 V). Superior channel-to-channel crosstalk also minimizes interference.
Integrated shunt resistors in the device helps to suppress pop noise on the audio path.
When VBUS is greater than VBUSTHRES, STG3696E will automatically switch from the audio
channel to the USB channel. The device is compatible with the requirements of USB 2.0 and
features low on capacitance plus low resistance needed to achieve high performance
switching in mobile applications.
The device allows the D+/D– pins to withstand an overvoltage condition of 5.5 V in
compliant with the USB 2.0 fault protection specification.
Figure 1. Logic diagram
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Pin settings STG3696E
6/21 Doc ID 18165 Rev 2
2 Pin settings
2.1 Pin connection
Figure 2. Pin connection (top through view)
2.2 Pin description
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Table 2. Pin assignment
Pin number Symbol Name and function
1 USB1 USB channel 1
2 AU2 Audio channel 2
3 AU1 Audio channel 1
4 GND Ground (0 V)
5V
CC Positive supply voltage
6 COM1 Common channel 1
7 COM2 Common channel 2
8AOVR
Audio Override Enable. When AOVR is low, switch selection is controlled
by VBUS. When AOVR is high, COM channels will be connected to audio
channels. AOVR has an internal pull-down resistor to GND.
9V
BUS
VBUS detection. If VBUS
VBUSTHRES, COM channels are connected to
USB channels. Otherwise, COM channels will be connected to audio
channels.
10 USB2 USB channel 2
USB1 USBZ AU1 AU2 E] iGND AOV H Table 3. Truth table vBus onn USBn AUn AUn shunt 2 VEUSTHRES LOW ON OFF ON < veusthres="" low="" off="" on="" off="" x“)="" on="" off="" on="" off="" i.="" don't="" care="" doc="" id="" 18155="" rev="" 2="" 7/21="">
STG3696E Functional diagram
Doc ID 18165 Rev 2 7/21
3 Functional diagram
Figure 3. Functional diagram
Table 3. Truth table
VBUS AOVR USBn AUn AUn shunt
VBUSTHRES LOW ON OFF ON
< VBUSTHRES LOW OFF ON OFF
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ON OFF ON OFF
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8/21 STGSGQGE USB/ audio connector COM1 COM2 STG3696E USB1 USBZ AU1 AUZ Doc ID 18155 Rev 2
Application diagram STG3696E
8/21 Doc ID 18165 Rev 2
4 Application diagram
Figure 4. Application diagram
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STG3696E Operation
Doc ID 18165 Rev 2 9/21
5 Operation
5.1 Overvoltage fault protection
STG3696E features an overvoltage fault protection in compliance to USB fault protection
specification. The fault protection circuitry is triggered when the voltage on the COMn
channels raise above VOVDT. The overvoltage fault protection helps to protect the switch and
USB transceiver from being damaged by excessive voltage levels.
5.2 Negative charge pump for negative rail audio signaling
STG3696E uses a negative charge pump to generate a negative supply which allows the
audio signal to swing below ground (up to VCC 5.0 V) on the AUn channels. If the device
fault protection is activated when the voltage on the COMn channels raise above VOVDT,
there must not be a negative voltage attached to the AUn channels.
5.3 VBUS detection feature
The connection between USBn and COMn is triggered when VBUS voltage is detected to be
higher than VBUSTHRES. If VBUS is constantly present in the application, driving the audio
override enable (AOVR) high will connect the AUn channels to the COMn channels. If AOVR
is low, the switching between AUn and USBn is controlled by the VBUS detection.
5.4 Pop noise suppression
When the AUn channels are not connected to the COMn channels, the AUn channels are
automatically connected to 200 Ω shunt resistors which helps to discharge any capacitance
built up on the AUn channels. This will reduce the possibility of pop and click noise
occurrence when switching between USB and audio sources.
Maximum ratings STG3696E
10/21 Doc ID 18165 Rev 2
6 Maximum ratings
Stressing the device above the rating listed in the “Absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the “Operating” sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
VCC Supply voltage –0.5 to 6.0 V
VCOMn Common port voltage AOVR = 1 or VBUS < VBUSTHRES – (VCC 6.0) to 6.0 V
VBUS
VBUSTHRES –0.5 to 6.0
VAUn Audio port voltage
AOVR = 1 or VBUS < VBUSTHRES
– (VCC – 6.0) to VCC
+ 0.5 V
VBUS
VBUSTHRES –0.5 to VCC + 0.5
VUSBn USB port voltage –0.5 to VCC + 0.5 V
IIK DC input diode current ± 50 mA
IOK DC output diode current ± 20 mA
IODC output current ± 150 mA
IOP DC output current peak (pulse at 1 ms, 10% duty cycle) ± 400 mA
ICC or IGND DC VCC or ground current ± 100 mA
PDPower dissipation at TA = 70 °C(1)
1. Derate above 70 °C by 18.5 mW/°C.
1120 mW
Tstg Storage temperature –65 to +150 °C
TLLead temperature (10 s) 300 °C
STG3696E DC and AC parameters
Doc ID 18165 Rev 2 11/21
7 DC and AC parameters
Table 5. Recommended operating conditions
Symbol Parameter Value Unit
VCC Supply voltage 2.7 to 4.5 V
VIO Input/output voltage
VUSBn 0 to VCC
V
VAUn V
CC – 5.0 to VCC
VCOMn (AOVR = 1 or
VBUS < VBUSTHRES)
VCC – 5.0 to VCC
VCOMn (VBUS
VBUSTHRES) 0 to VCC
Top Operating temperature –40 to 85 °C
Table 6. DC and AC characteristics
Symbol Parameter VCC
(V) Test conditions(1) Value
Unit
Min. Typ.(2) Max.
VIH High level input voltage 1.6 V
VIL Low level input voltage 0.4 V
VBUSTHRES
VBUS detect threshold
voltage
0.5 x
VCC
V
VOVDT(3) COM overvoltage detect
threshold
2.7 -
3.3 TA = 25 °C VCC
+ 0.35
VCC
+ 1.0 V
RON(AU)
Audio channel ON
Resistance 3.0 VAUn = –1.5 V, 1.5 V
ICOMn = 10 mA 2.4 5 Ω
RON(USB)
USB channel ON
Resistance 3.0 VUSBn = 0 V, VCC
ICOMn = 10 mA 2.4 5 Ω
ΔRON(AU)(4),(5) ON resistance matching
between audio channels 3.0 VAUn = 0 V
ICOMn = 10 mA 0.5 Ω
ΔRON(USB(4),(5) ON resistance matching
between USB channels 3.0 VUSBn = 0 V
ICOMn = 10 mA 0.5 Ω
RFLAT(AU)(6) ON resistance flatness
for audio channels 3.0 VAUn = –1.5 V to 1.5 V
ICOMn = 10 mA 0.03 0.25 Ω
RFLAT(USB)(6) ON resistance flatness
for USB channels 3.0 VUSBn = 0 V to VCC
ICOMn = 10 mA 0.05 0.5 Ω
RSH Shunt switch resistance IAUn = 1 mA 200 300 Ω
IUSB(OFF)
USB channel off leakage
current 3.0 VUSBn = 2.5 V, 0 V
VCOMn = –1.5 V, 2.5 V –15 15 nA
ICOM(OFF)
Common channel off
leakage current 0VCOMn = 3.6 V
VUSBn = VAUn = 0 V 500 µA
£1
DC and AC parameters STG3696E
12/21 Doc ID 18165 Rev 2
ICOM(ON)
Common channel on
leakage current
3.0 USB
mode
VAUn = 0 V, 2.5 V,
unconnected
VCOMn = 0 V, 2.5 V
0.3 1
µA
3.0 Audio
mode
VUSBn = 0 V, 2.5 V,
unconnected
VCOMn = –1.5 V, 2.5 V
0.3 1
ICC Quiescent supply current
3.3 VAOVR = 0, VBUS = VBUSTHRES 924
µA
VAOVR = VCC, VBUS = 0 V 9 24
4.5 VAOVR = 0, VBUS > VBUSTHRES 18 36
VAOVR = VCC, VBUS = 0 V 18 36
tFP
Fault-protection
response time 3.0 VCOMn = 1 V to 5 V step, RUSBn +
RAUn = 1 kΩ1.3 5.0 µs
tFPR
Fault-protection recovery
time 3.0 VCOMn = 5 V to 1 V step, RUSBn +
RAUn = 1 kΩ–55 µs
tON Turn on time
3.0 AUn to
COMn
(VAOVR = 0 V, VBUS = 5.0 V
to 0 V) or (VBUS = 5.0 V,
VAOVR = 0 V to VCC)
55 85
µs
3.0 USBn to
COMn
VAOVR = 0V, VBUS = 0 V to
5.0 V 55 85
tOFF Turn off time
3.0 AUn to
COMn
(VAOVR = 0 V, VBUS = 0 V
to 5.0 V) or (VBUS = 5.0 V,
VAOVR = VCC to 0 V)
1.4 5
µs
3.0 USBn to
COMn
(VAOVR = 0 V, VBUS = 5.0 V
to 0 V) or (VBUS = 5.0 V,
VAOVR = 0 V to VCC)
0.7 5
tD
Break-before-make time
delay R
L = 50 Ω55 µs
tSK(0)
Channel-to-channel
skew 40 ps
tSK(P)
Skew of opposite
transition of the same
output
40 ps
OIRR OFF isolation(7) VCOM = 1 VRMS, f = 100 kHz,
RS = RL = 50 Ω–65 dB
Xtalk Crosstalk(8) VCOM = 1 VRMS, f = 100 kHz,
RS = RL = 50 Ω–70 dB
THD + N Total Harmonic
Distortion + noise
AUn to COMn f = 20 Hz to 20 kHz,
VCOM = 0.5 VPP
, DC bias = 0 V,
RL = 600 Ω
0.05 %
PSRR Power supply rejection
ratio
2.7 -
3.3 f = 10 kHz, RCOMn = 50 Ω35 dB
Table 6. DC and AC characteristics (continued)
Symbol Parameter VCC
(V) Test conditions(1) Value
Unit
Min. Typ.(2) Max.
STG3696E DC and AC parameters
Doc ID 18165 Rev 2 13/21
BW -3 dB bandwidth AUn RS = RL = 50 Ω
signal = 0 dBm
850 MHz
USBn 850
CCOM(ON) On capacitance
USBn to
COMn
VCOM = 0.5VP-P
,
DC bias = 0 V,
f = 240 MHz
8
pF
AUn to
COMn
VCOM = 0.5 VP-P
,
DC bias = 0 V,
f = 1 MHz
8
CAU(OFF)
Audio channel off
capacitance
VCOM = 0.5 VP-P
, DC bias = 0 V,
f = 1 MHz 8
pF
CUSB(OFF)
USB channel off
capacitance
VCOM = 0.5 VP-P
, DC bias = 0 V,
f = 240 MHz 3.3
1. Valid for ambient operating temperature: TA = –40 to 85 °C, VCC = 2.7 V to 4.5 V (except where noted).
2. Typical values are TA = 25 °C.
3. When the voltage goes above VOVDT, the switch turns off and protects the downstream circuits in case of a fault condition.
4. ΔRON = max |mSN-nSN|, where m and n = 1, 2 and N = 1, 2.
5. Guaranteed by design.
6. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
7. Off isolation = 20 Log10 (VD/VS), VD = output, VS = input to off switch.
8. Between the two switches.
Table 6. DC and AC characteristics (continued)
Symbol Parameter VCC
(V) Test conditions(1) Value
Unit
Min. Typ.(2) Max.
Package mechanical data STG3696E
14/21 Doc ID 18165 Rev 2
8 Package mechanical data
ECOPACK®
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 5. Package outline for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch
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STG3696E Package mechanical data
Doc ID 18165 Rev 2 15/21
Table 7. Mechanical data for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch
Figure 6. Recommended footprint for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch
Symbol
millimeters inches
Min. Typ. Max. Min. Typ. Max.
A 0.45 0.50 0.55 0.0177 0.0197 0.0217
A1 0 0.02 0.05 0.0000 0.0008 0.0020
A3 0.127 0.0050
b 0.15 0.20 0.25 0.0059 0.0079 0.0098
D 1.75 1.80 1.85 0.0689 0.0709 0.0728
E 1.35 1.40 1.45 0.0531 0.0551 0.0571
e 0.40 0.0157
L 0.35 0.40 0.45 0.0138 0.0157 0.0177
L1 0.45 0.50 0.55 0.0177 0.0197 0.0217
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Package mechanical data STG3696E
16/21 Doc ID 18165 Rev 2
Figure 7. Carrier tape for QFN10 (1.8 x 1.4 x 0.5 mm)
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STG3696E Package mechanical data
Doc ID 18165 Rev 2 17/21
Figure 8. Reel information (front side) for QFN10 (1.8 x 1.4 x 0.5 mm)
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Package mechanical data STG3696E
18/21 Doc ID 18165 Rev 2
Figure 9. Reel information (back view) for QFN10 (1.8 x 1.4 x 0.5 mm)
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STG3696E Package marking information
Doc ID 18165 Rev 2 19/21
9 Package marking information
Table 8. Device topside marking information
Step type marking
Marking composition CD00155614 for V885
VFQFPN 10L 1.81 x 1.4 x 0.5 (pin1 dot at TLC)
PACKAGE FACE: TOP LEGEND
Unmarkable surface
Marking composition field
A - 47862 - MARKING AREA (123)
B - 47861 - DOT
CODE
47862
COMPOSN FLD TYPE
MARKING AREA
MARKING VALUE
U47
!-
!
"
Revision history STG3696E
20/21 Doc ID 18165 Rev 2
10 Revision history
Table 9. Document revision history
Date Revision Changes
27-Oct-2010 1 Initial release.
26-Jan-2011 2 Updated Ta b l e 6 , corrected typo in Tab l e 2 , Ta b l e 3 and Ta b l e 5 .
STG3696E
Doc ID 18165 Rev 2 21/21
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