V23818-N15-Lx Datasheet by Infineon Technologies

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LC™ is a trademark of Lucent
Fiber Optics MARCH 2002
V23818-N15-Lxx/Lxxx(*)
Small Form Factor
Single Mode 1300 nm 2.5 GBd Transceiver
2x5/2x10 Pinning with LC™ Connector
Preliminary
FEATURES
Small Form Factor transceiver
RJ-45 style LC
connector system
Half the size of SC Duplex 1x9 transceiver
Optimized for SDH STM-16 / SONET OC-48
Single power supply (+3.3 V)
Extremely low power consumption
Loss of optical signal indicator
Laser disable input
PECL differential inputs and outputs
Suitable for multi rate applications up to 2.5 GBd
Distance up to 2 km on single mode fiber (SMF)
Class 1 FDA and IEC laser safety compliant
•Multisource footprint
Small footprint for high channel density
UL 94 V-0 certified
Compliant with FCC (Class B) and EN 55022
Tx and Rx power monitor
a) recommended bezel position
Drawing shown is 2x10 pinning with collar
Dimensions in mm [inches]
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC™)
2
*) Ordering Information
Absolute Maximum Ratings
Exceeding any one of these values may destroy the device
immediately.
Package Power Dissipation................................................0.9 W
Supply Voltage (VCC–VEE)......................................................4 V
Data Input Levels........................................ VCC+0.5 to VEE–0.5
Differential Data Input Voltage............................................2.5 V
PIN PDBias Voltage ...............................................................4 V
Operating Case Temperature(1)...............................–5°C to 70°C
Operating Case Temperature(2).............................–40°C to 85°C
Storage Ambient Temperature..............................–40°C to 85°C
Hand Lead Soldering Temp/Time..............................260°C/ 10 s
Wave Soldering Temp/Time......................................260°C/ 10 s
Aqueous Wash Pressure ...............................................<110 psi
Notes
1. Not for V23818-N15-Lx6/Lxx6.
2. Only for V23818-N15-Lx6/Lxx6.
DESCRIPTION
The Infineon 2.5 Gigabit single mode transceiver – part of the
Infineon Small Form Factor transceiver family – is based on the
Physical Medium Depend (PMD) sublayer and baseband
medium, type 2000 Base-LX.
The appropriate fiber optic cable is 9 µm single mode fiber with
LC connector.
The Infineon OC-48 single mode transceiver is a single unit
comprised of a transmitter, a receiver, and an LC receptacle.
This design frees the customer from many alignment and PC
board layout concerns.
This transceiver supports the LC connectorization concept,
which competes with UTP/CAT 5 solutions. It is compatible
with RJ-45 style backpanels for fiber-to-the-desktop applica-
tions while providing the advantages of fiber optic technology.
The transmission distance is up to 2 km.
The module is designed for low cost LAN, WAN, and up to
2.5 Gbit/s applications. It can be used as the network end
device interface in mainframes, workstations, servers, and
storage devices, and in a broad range of network devices such
as bridges, routers, hubs, and local and wide area switches.
This transceiver operates at up to 2.5 Gbit/s from a single
power supply (+3.3 V). The full differential data inputs and
outputs are LVPECL compatible.
Part Number Input Output Signal
detect Data Outputs if SD is Low Operating
Temperature Collar Pinning
V23818-N15-L17 DC DC PECL Switched to Low –5...70°C yes 2x10
V23818-N15-L16 DC DC PECL –40...85°C yes 2x10
V23818-N15-L353 AC AC TTL –5...70°C yes 2x10
V23818-N15-L356 AC AC TTL –40...85°C yes 2x10
V23818-N15-L417 DC DC PECL Active –5...70°C yes 2x10
V23818-N15-L457 AC AC TTL –5...70°C yes 2x10
V23818-N15-L354 AC AC TTL Switched to Low 5...70°C yes 2x10
V23818-N15-L355 AC AC TTL –5...70°C no 2x10
V23818-N15-L37 DC DC PECL –5...70°C yes 2x5
V23818-N15-L36 DC DC PECL –40...85°C yes 2x5
V23818-N15-L47 AC AC TTL –5...70°C yes 2x5
V23818-N15-L46 AC AC TTL –40...85°C yes 2x5
V23818-N15-L373 AC AC PECL –5...70°C yes 2x10
V23818-N15-L46WH AC AC TTL –40...85°C yes 2x5
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC™)
3
Functional Description of SFF Transceiver
This transceiver is designed to transmit serial data via single
mode fiber.
Functional Diagram 2x10 Pin Rows
Functional Diagram 2x5 Pin Rows
The receiver component converts the optical serial data into an
electrical data (RD+ and RD). The Signal Detect output (SD)
shows whether an optical signal is present.
The transmitter part converts electrical LVPECL compatible
serial data (TD+ and TD) into optical serial data.
The module has an integrated shutdown function that switches
the laser off in the event of an internal failure.
Reset is only possible if the power is turned off, and then on
again. (VCCt switched below VTH).
The transmitter contains a laser driver circuit that drives the
modulation and bias current of the laser diode. The currents are
controlled by a power control circuit to guarantee constant out-
put power of the laser over temperature and aging. The power
control uses the output of the monitor PIN diode (mechanically
built into the laser coupling unit) as a controlling signal, to pre-
vent the laser power from exceeding the operating limits.
TECHNICAL DATA
The electro-optical characteristics described in the following
tables are valid only for use under the recommended operating
conditions.
Recommended Operating Conditions
Notes
1. Only for V23818-N15-Lx6/Lxx6.
2. Not for V23818-N15-Lx6/Lxx6.
3. V23818-N15-L353/L356/L457/L354/L355/L47/L46/L373 are inter-
nally AC coupled. External coupling capacitors required only for
V23818-N15-L17/L16/L417/L37/L36.
Laser
Driver Laser
Monitor
Power
Control
Receiver
SD
PDBias
TD+
RD+
RD
-
BMon
-
BMon+
TD
-
Tx
Coupling Unit
Rx
Coupling Unit
e/o
o/e
o/e
TDis
PMon
-
3k
3k
3k
10
Single
Mode
Fiber
Automatic
Shut-Down
PMon+
200
3k
Laser
Driver Laser
Monitor
Power
Control
Receiver
SD
TD+
RD+
RD
TD
Tx
Coupling Unit
Rx
Coupling Unit
e/o
o/e
o/e
TDis
Single
Mode
Fiber
Automatic
Shut-Down
Parameter Symbol Min. Typ. Max. Unit
Case Temperature(1) TC40 85 °C
Case Temperature(2) 570
Power Supply Voltage VCCVEE 3.14 3.3 3.46 V
Supply Current Tx ICCt 110 mA
Transmitter
Data Input
High Voltage VIHVCC 1165 880 mV
AC-coupled Differential
Data Input(3) VIDiff 250 1600
Data Input
Low Voltage VILVCC 1810 1475
Data Input
Rise/Fall time ti120 ps
Receiver
Supply Current Rx ICCr 120 mA
Input Center
Wavelength λRX 1260 1580 nm
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
4
Transmitter Electro-Optical Characteristics
Notes
1. Not for V23818-N15-L354/L355.
2. Only for V23818-N15-L354/L355.
3. Laser power is shut down if power supply is below VTH and
switched on if power supply is above VTH after tDEL.
4. Measured using 20%80% levels without bandwidth filtering.
5. TDis assertion to laser shutdown.
6. TDis reassertion to laser startup.
Jitter
The transceiver is specified to meet the SONET Jitter perfor-
mance as outlined in ITU-T G.958 and Telcordia GR-253.
Jitter Generation is defined as the amount of jitter that is gener-
ated by the transceiver. The Jitter Generation specifications are
referenced to the optical OC-48 signals. If no or minimum jitter
is applied to the electrical inputs of the transmitter, then Jitter
Generation can simply be defined as the amount of jitter on the
Tx optical output. The SONET specifications for Jitter Genera-
tion are 0.01 UI rms, maximum and 0.1 UI p-p, maximum. Both
are measured with a 12 KHz 20 MHz filter in line. A UI is a
Unit Interval, which is equivalent to one bit slot. At OC-48, the
bit slot is 400 ps, so the Jitter Generation specification trans-
lates to 4 ps rms, max. and 40 ps p-p, max.
Receiver Electro-Optical Characteristics
Notes
1. Minimum average optical power at which the BER is less than
1x1010. Measured with a 2231 NRZ PRBS as recommended by
ANSI T1E1.2, SONET OC-48, and ITU-T G.957.
2. An increase in optical power above the specified level will cause the
Signal Detect to switch from a low state to a high state (high active
output).
3. A decrease in optical power below the specified level will cause the
Signal Detect to switch from a high state to a low state.
4. Load is 100 differential.
5. Internal Load is 510 to GND, no external load necessary. Signal
Detect is a high active output. High level means signal is present,
low level means loss of signal.
6. For V23818-N15-L17/L16/L417/L37/L36/L373.
7. For V23818-N15-L353/L356/L457/L354/L355/L47/L46.
8. Monitor current needs to be sunk to VCC.
Transmitter Symbol Min. Typ. Max. Unit
Output Power
(Average)(1) PO10 3dBm
Output Power
(Average)(2) 83
Center Wavelength λC1266 1360 nm
Spectral Width (RMS) σ4
Extinction Ratio
(Dynamic) ER 8.2 dB
Eye Diagram ED ITU-T G.957 mask pattern
Reset Threshold for
VCCt(3) VTH 2.2 2.99 V
Power on Delay(3) tDEL 30 ms
Jitter Generation JGEp-p
UI
JGERMS
Rise Time(4) tR70 ps
Fall Time(4) tF225
TDis Assert Voltage TTL VTDH 2.0 V
TDis Deassert Voltage TTL VTDL 0.8
TDis Assert Time(5) tASS 0.4 1 ms
TDis Deassert Time(6) tDAS 0.06 10 µs
Receiver Symbol Min. Typ. Max. Unit
Sensitivity
Average Power)(1) 19 dBm
Saturation
(Average Power) PSAT 3
Signal Detect
Assert Level(2) PSDA 19
Signal Detect
Deassert Level(3) PSDD 30
Signal Detect
Hysteresis PSDA-
PSDD 3dB
Signal Detect
Assert Time(2) tASS 0.1 ms
Signal Detect
Deassert Time(3) tDAS 0.35
Output Voltage(4) VOHVCC 1110 650 mV
Output Voltage(4) VOLVCC 1800 1300
Output Voltage
Swing VOHVOL 500 1000
Signal Detect Out-
put High Voltage
PECL(5,6)
VSDH
VEE VCC
1200 VCC
820 mV
Signal Detect Out-
put Low Voltage
PECL(5,6)
VSDL
VEE VCC
1900 VCC
1620
Signal Detect Out-
put High Voltage
TTL(5,7)
VSDH 2.0 V
Signal Detect Out-
put Low Voltage
TTL(5,7)
VSDL 0.5
Photo Detector
Bias(8) PDBias 0.5 1.0 A/W
Reflectance PREF 33 27 dB
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
5
Regulatory Compliance EYE SAFETY
This laser based single mode transceiver is a Class 1 product.
It complies with IEC 60825-1 and FDA 21 CFR 1040.10 and
1040.11.
The transceiver has been certified with FDA under accession
number 9520890.
To meet laser safety requirements the transceiver shall be oper-
ated within the Absolute Maximum Ratings.
Caution
All adjustments have been made at the factory prior to ship-
ment of the devices. No maintenance or alteration to the
device is required.
Tampering with or modifying the performance of the device
will result in voided product warranty.
Note
Failure to adhere to the above restrictions could result in a modifica-
tion that is considered an act of manufacturing, and will require,
under law, recertification of the modified product with the U.S. Food
and Drug Administration (ref. 21 CFR 1040.10 (i)).
Laser Data
Required Labels
Laser Emission
Feature Standard Comments
ESD:
Electrostatic
Discharge to the
Electrical Pins
EIA/JESD22-A114-A
(MIL-STD 883D
Method 3015.7)
Class 1 (>1000 V)
Immunity:
Against Electro-
static Discharge
(ESD) to the
Duplex LC
Receptacle
EN 61000-4-2
IEC 61000-4-2 Discharges ranging
from ±2 kV to ±15 kV on
the receptacle cause no
damage to transceiver
(under recommended
conditions).
Immunity:
Against Radio Fre-
quency Electro-
magnetic Field
EN 61000-4-3
IEC 61000-4-3 With a field strength of
3 V/m rms, noise
frequency ranges from
10 MHz to 2 GHz. No
effect on transceiver
performance between
the specification limits.
Emission:
Electromagnetic
Interference (EMI)
FCC 47 CFR Part 15,
Class B
EN 55022 Class B
CISPR 22
Noise frequency range:
30 MHz to 18 GHz
Wavelength 1300 nm
Total output power (as defined by IEC: 7 mm
aperture at 14 mm distance) less than
2 mW
Total output power (as defined by FDA: 7 mm
aperture at 20 cm distance) less than
180 µW
Beam divergence t.b.d.
Class 1 Laser Product
IEC
Complies with 21 CFR
1040.10 and 1040.11
FDA
Tx
TOP VIEW
Rx
20 19 18 17 16 15 14 13 12 11
12345678910
Indication of
laser aperture
and beam
ooooolcuoo-
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
6
2x10 Pin Connect Diagram
2x10 Pin Description
Note
1. LVPECL output active high for V23818-N15-L17/L16/L417/L373.
LVTTL output active high for V23818-N15-L353/L356/L457/L355/
L354.
2x5 Pin Connect Diagram
2x5 Pin Description
Notes
1. LVPECL output active high for V23818-N15-L37/L36.
LVTTL output active high for V23818-N15-L47/L46.
2. Housing leads removed for V23818-N15-L46WH.
Due to possible EMI performance issues, use of this transceiver
should be restricted to applications where the chassis is completely
sealed and the transceiver encapsulated within.
Transceiver Pitch
Pin Name Level Description
1 PDBias DC current PIN photo detector bias current
2V
EEr Ground Receiver signal ground
3V
EEr Ground Receiver signal ground
4 NC Not connected
5 NC Not connected
6V
EEr Ground Receiver signal ground
7V
CCr Power supply Receiver power supply
8SD LVTTL or
LVPECL
output(1)
Receiver optical input level
monitor
9RDLVPECL output Receiver data out bar
10 RD+ LVPECL output Receiver data out
11 VCCt Power supply Transmitter power supply
12 VEEt Ground Transmitter signal ground
13 TDis LVTTL input Transmitter disable
14 TD+ LVPECL input Transmitter data in
15 TDLVPECL input Transmitter data in bar
16 VEEt Ground Transmitter signal ground
17 BMonDC voltage Laser diode bias current monitor
18 BMon+ DC voltage Laser diode bias current monitor
19 PMonDC voltage Laser diode optical power
monitor
20 PMon+ DC voltage Laser diode optical power
monitor
MS Mounting studs
HL Housing leads
Tx
Rx
20
HL
HL HL
HL
191817161514131211
12345678910
TOP VIEW
MS
MS
Pin Name Level Description
1V
EEr Ground Receiver signal ground
2V
CCr Power supply Receiver power supply
3 SD LVTTL or
LVPECL
output(1)
Receiver optical input level
monitor
4RDLVPECL output Receiver data out bar
5 RD+ LVPECL output Receiver data out
6V
CCt Power supply Transmitter power supply
7V
EEt Ground Transmitter signal ground
8 TDis LVTTL input Transmitter disable
9 TD+ LVPECL input Transmitter data in
10 TDLVPECL input Transmitter data in bar
MS Mounting studs
HL(2) Housing leads
Tx
Rx
HL
HL HL
HL
12345
678910
TOP VIEW
MS
MS
(13.97)
.550 *)
*) min. pitch between SFF transceiver according to MSA.
Dimensions in (mm) inches
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
7
VEEr / VEEt
For 2x10 transceivers, connect pins 2, 3, 6, 12 and 16 to signal
ground.
For 2x5 transceivers, connect pins 1 and 7 to signal ground.
VCCr / VCCt
For 2x10 transceivers a 3.3 V DC power supply must be applied
at pins 7 and 11.
For 2x5 transceivers a 3.3 V DC power supply must be applied
at pins 2 and 6.
A recommended power supply filter network is given in the ter-
mination scheme. Locate power supply filtering directly at the
transceiver power supply pins. Proper power supply filtering is
essential for good EMI performance.
TD+ / TD
Transmitter data LVPECL level inputs.
For V23818-N15-L353/L356/L457/L354/L355/L47/L46/L373
terminated and AC coupled internally.
For V23818-N15-L17/L16/L417/L37/L36 use termination and
coupling as shown in the termination scheme.
RD / RD+
Receiver data LVPECL level outputs.
For V23818-N15-L353/L356/L457/L354/L355/L47/L46/L373
biased and AC coupled internally.
For V23818-N15-L17/L16/L417/L37/L36 use termination and
coupling as shown in the termination scheme.
TDis
A logical LVTTL high input will disable the laser. To enable the
laser, an LVTTL low input must be applied. Leave pin uncon-
nected if feature not required.
SD
LVTTL output for V23818-N15-L353/L356/L457/L354/L355/L47/
L46.
LVPECL output for V23818-N15-L17/L16/L417/L37/L36/L373.
A logical high output indicates normal optical input levels to the
receiver. Low optical input levels at the receiver result in a low
output. Signal Detect can be used to determine a definite opti-
cal link failure; break in fiber, unplugging of a connector, faulty
laser source. However it is not a detection of a bad link due to
data-related errors.
MS
Mounting studs are provided for transceiver mechanical attach-
ment to the circuit board. They also provide an optional connec-
tion of the transceiver to the equipment chassis ground. The
holes in the circuit board must be tied to chassis ground.
HL
Housing leads are provided for additional signal grounding. The
holes in the circuit board must be included and tied to signal
ground.
2x10 Transceiver Additional Functionality
PDBias
Connect pin 1 to VCC through a bias resistor, of a value not
exceeding 2 k, as shown in Figure 1 to monitor PIN photo
detector bias current. Leave pin floating if not used. Typical
behaviour is shown in Figures 2a and 2b using a 2 k load.
Figure 1. Photo Detector Bias Interface
Typical Responsitivity of PIN Photo Detector Bias Current
Monitor
Figure 2a. Linear Response
Figure 2b. Logarithmic Response
2 k
Vcc
Pin 1
V
bias
0
100
200
300
400
0 100 200 300 400
Received Optical Power (µW)
Photo Detector Monitor Current (µA)
0
100
200
300
400
-30 -24 -18 -12 -6 0
Received Optical Power (dBm)
Photo Detector Monitor Current (µA)
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
8
BMon / BMon+
The DC voltage measured across pins 17 and 18 is proportional
to the laser bias current. Use the equation:
Ibias = Vbias / 10
Use this output to monitor laser performance and EOL condi-
tions. A schematic and typical behaviour are shown in Figures 3
and 4. Ibias @ ambient 25°C < 60 mA. Leave pins floating if func-
tion is not required.
Figure 3. Bias Monitor Transceiver Internal
Figure 4. Typical Variations of Bias Monitor Voltage over
Temperature
PMon / PMon+
The DC voltage that can be measured across pins 19 and 20 is
proportional to the laser monitor diode current through a 200
resistor in its path. This output remains constant and can be
used to monitor correct operation of laser control circuitry,
a deviation indicates faulty behaviour. A schematic and typical
behaviour are shown in Figures 5 and 6. Vmon should be in the
range of 0.01 and 0.2 Volts. Leave pins unconnected if feature is
not required.
Figure 5. Power Monitor Transceiver Internal
Figure 6. Typical Behaviour of Power Monitor Voltage over
Temperature
10
3 k
3 k
Vee
Vcc
Pin 18
Pin 17
0
0,04
0,08
0,12
0,16
0,2
0,24
0,28
0,32
0,36
0 10203040506070
Temperature (°C)
BMon Output Voltage (V)
200
3 k
3 k
Vee
Vcc
R
Pin 20
Pin 19
0,00
0,01
0,02
0,03
0,04
0,05
0,06
0,07
0,08
0 10203040506070
Temperature (°C)
PMon Output Voltage (V)
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
9
EMI-Recommendations
To avoid electromagnetic radiation exceeding the required limits
please take note of the following recommendations.
When Gigabit switching components are found on a PCB (multi-
plexers, clock recoveries etc.) any opening of the chassis may
produce radiation also at chassis slots other than that of the
device itself. Thus every mechanical opening or aperture should
be as small as possible.
On the board itself every data connection should be an imped-
ance matched line (e.g. strip line, coplanar strip line). Data,
Datanot should be routed symmetrically, vias should be
avoided. A terminating resistor of 100 should be placed at the
end of each matched line. An alternative termination can be
provided with a 50 resistor at each (D, Dn). In DC coupled
systems a thevenin equivalent 50 resistance can be achieved
as follows: for 3.3 V: 125 to VCC and 82 to VEE, for 5 V:
82 to VCC and 125 to VEE at Data and Datanot. Please con-
sider whether there is an internal termination inside an IC or a
transceiver.
In certain cases signal GND is the most harmful source of radia-
tion. Connecting chassis GND and signal GND at the plate/
bezel/ chassis rear e.g. by means of a fiber optic transceiver
may result in a large amount of radiation. Even a capacitive cou-
pling between signal GND and chassis may be harmful if it is
too close to an opening or an aperture.
If a separation of signal GND and chassis GND is not possible,
it is strongly recommended to provide a proper contact
between signal GND and chassis GND at every location where
possible. This concept is designed to avoid hotspots. Hotspots
are places of highest radiation which could be generated if only
a few connections between signal and chassis GND exist.
Compensation currents would concentrate at these connec-
tions, causing radiation.
By use of Gigabit switching components in a design, the return
path of the RF current must also be considered. Thus a split
GND plane of Tx and Rx portion may result in severe EMI prob-
lems.
A recommendation is to connect the housing leads to signal
GND. However, in certain applications it may improve EMI per-
formance by connecting them to chassis GND.
The cutout should be sized so that all contact springs make
good contact with the face plate.
Please consider that the PCB may behave like a waveguide.
With an εr of 4, the wavelength of the harmonics inside the
PCB will be half of that in free space. In this scenario even the
smallest PCBs may have unexpected resonances.
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
10
Recommended Termination Scheme
2x10 DC/DC Transceiver
C6
C7
13 TDis
PDBias
BMon
BMon+
Laser
Driver
Signal
Detect
Limiting
Amplifier
Pre-
Amp SerDat In
SerDat In +
SerDat Out
SerDat Out
Serializer/
Deserializer
RD
ECL/
PECL
Driver
Receiver
PLL etc.
SFF Transceiver
V23818-N15-L17/L16/L417
2,3,6
10
9
8
7
11
15
14
1720 19 18
1
12,16
SD
VEEt
TD+
TD
VCCt
VCCr
SD
RD
RD+
VEEr
VCC
R4
R5
L1
L2
C2
C1
R2
R3
R1
C3
C4
C5
VCC SerDes
VCC
3.3 V
RD+
R7
R9
R6
R8
VCC
3.3 V
TDis
+
PMon+
PMon
L1/2 = 1 ... 4.7 µH
C1/2/3 = 4.7 ... 10 µF
C4/5/6/7 = 100 nF
R1 = 100 (Depending on SerDes chip used, ensure proper
50 termination to VEE or 100 differential is provided.
Check for termination inside of SerDes chip).
R2/3 = 150
R4/5 = Biasing (depends on SerDes chip).
R6/7 = 127
R8/9 = 82
Place R1/4/5 close to SerDes chip.
Place R2/3/6/7/8/9 close to Infineon transceiver.
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
11
Recommended Termination Scheme
2x10 AC/AC Transceiver
13 TDis
PDBias
PMon+
PMon
BMon
BMon+
R3
R4
R1
R2
VCC SerDes
100
Laser
Driver
Signal
Detect
Limiting
Amplifier
Pre-
Amp SerDat In
SerDat In +
SerDat Out +
SerDat Out
Serializer/
Deserializer
ECL/
PECL
Driver
Receiver
PLL etc.
SFF Transceiver
V23818-N15-L353/L356/L354/L355/L373/L457
2,3,6
10
9
8
7
11
15
14
1719
20 18
1SD
VEEt
TD+
TD
VCCt
VCCr
SD
RD
RD+
VEEt
VCC
R5
R6
L1
L2
C2
C1
C3
VCC
3.3 V
TDis
L1/2 = 1 ... 4.7 µH
C1/2/3 = 4.7 ... 10 µF
R1/2/3/4 = Depends on SerDes chip used, ensure proper
50 termination to VEE or 100 differential is provided.
Check for termination inside of SerDes chip.
R5/6 = Biasing (depends on SerDes chip).
Place R1/2/3/4/5/6 close to SerDes chip.
Fiber Optics V23818-N15-Lxx/Lxxx, SFF SM 1300nm 2.5GBd Trx 2x5/2x10 (LC)
12
Recommended Termination Scheme
2x5 DC/DC Transceiver
C6
C7
8TDis
Laser
Driver
Signal
Detect
Limiting
Amplifier
Pre-
Amp SerDat In
SerDat In +
SerDat Out
SerDat Out
Serializer/
Deserializer
RD
ECL/
PECL
Driver
Receiver
PLL etc.
SFF Transceiver
V23818-N15-L37/L36
5
4
3
2
6
10
9
1
7
SD
VEEt
TD+
TD
VCCt
VCCr
SD
RD
RD+
VEEr
VCC
R4
R5
L1
L2
C2
C1
R2
R3
R1
C3
C4
C5
VCC SerDes
VCC
3.3 V
RD+
R7
R9
R6
R8
VCC
3.3 V
TDis
+
L1/2 = 1 ... 4.7 µH
C1/2/3 = 4.7 ... 10 µF
C4/5/6/7 = 100 nF
R1 = 100 (depending on SerDes chip used, ensure proper
50 termination to VEE or 100 differential is provided.
Check for termination inside of SerDes chip).
R2/3 = 150
R4/5 = biasing for outputs depending on Serializer.
R6/7 = 127
R8/9 = 82
Place R1/4/5 close to SerDes chip.
Place R2/3/6/7/8/9 close to Infineon transceiver.
Published by Infineon Technologies AG
© Infineon Technologies AG 2002
All Rights Reserved
Attention please!
The information herein is given to describe certain components and shall not be
considered as warranted characteristics.
Terms of delivery and rights to technical change reserved.
We hereby disclaim any and all warranties, including but not limited to warranties
of non-infringement, regarding circuits, descriptions and charts stated herein.
Infineon Technologies is an approved CECC manufacturer.
Information
For further information on technology, delivery terms and conditions and prices
please contact the Infineon Technologies offices or our Infineon Technologies
Representatives worldwide - see our webpage at
www.infineon.com/fiberoptics
Warnings
Due to technical requirements components may contain dangerous substances.
For information on the types in question please contact your Infineon Technologies
offices.
Infineon Technologies Components may only be used in life-support devices or
systems with the express written approval of Infineon Technologies, if a failure of
such components can reasonably be expected to cause the failure of that
life-support device or system, or to affect the safety or effectiveness of that device
or system. Life support devices or systems are intended to be implanted in the
human body, or to support and/or maintain and sustain and/or protect human life.
If they fail, it is reasonable to assume that the health of the user or other persons
may be endangered.
Infineon Technologies AG Fiber Optics Wernerwerkdamm 16 Berlin D-13623, Germany
Infineon Technologies, Inc. Fiber Optics 1730 North First Street San Jose, CA 95112, USA
Infineon Technologies K.K. Fiber Optics Takanawa Park Tower 20-14, Higashi-Gotanda, 3-chome, Shinagawa-ku Tokyo 141, Japan
Recommended Termination Scheme
2x5 AC/AC Transceiver
8TDis
Laser
Driver
Signal
Detect
Limiting
Amplifier
Pre-
Amp SerDat In
SerDat In +
SerDat Out
SerDat Out
Serializer/
Deserializer
RD
ECL/
PECL
Driver
Receiver
PLL etc.
SFF Transceiver
V23818-N15-L47/L46
5
4
3
2
6
10
9
1
7
SD
VEEt
TD+
TD
VCCt
VCCr
SD
RD
RD+
VEEr
VCC
R5
R6
L1
L2
C2
C1
C3
VCC SerDes
VCC
3.3 V
RD+
TDis
+
R3
R4
R1
R2
100
L1/2 = 1 ... 4.7 µH
C1/2/3 = 4.7 ... 10 µF
R1/2/3/4 = Depends on SerDes chip used, ensure proper
50 termination to VEE or 100 differential is provided.
Check for termination inside of SerDes chip.
R5/6 = Biasing (depends on SerDes chip).
Place R1/2/3/4/5/6 close to SerDes chip.

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