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V23806-A84-C5
SM 155 Mbd ATM/SDH/SONET Transceiver
3.3 V V23806-A84-C5
Single Mode 155 MBd ATM/SDH/SONET 2x9 Transceiver
with Rx Monitor
FEATURESCompliant with ATM, SONET OC-3, SDH STM-1 Compact integrated transceiver unit withMQW laser diode transmitterInGaAs PIN photodiode receiverDuplex SC receptacle Class 1 FDA and IEC laser safety compliantFDA Accession No. 9520890-08Single power supply (+3.3 V)Signal detect indicatorPECL differential inputs and outputsProcess plug includedWave solderable and washable with process
plug insertedAnalog Rx power monitor outputIndustry multisource 2x9 footprintFor distances of up to 15 km on single mode fiber
Absolute Maximum RatingsExceeding any one of these values may destroy the device
immediately.
Package Power Dissipation(1)............................................1.5 W
Supply Voltage (VCC–VEE)......................................................6 V
Data Input Levels.......................................................... VCC+0.5
Differential Data Input Voltage............................................2.5 V
Operating Case Temperature..................................0°C to 70°C
Storage Ambient Temperature............................–40°C to 85°C
Soldering Conditions Temp/Time
(MIL-STD 883 C Method 2003).............................250°C/5.5s
Note
1. For VCC–VEE (min., max.). 50% duty cycle. The supply current does
not include the load drive current of the receiver output. Add max.
45 mA for the three outputs. Load is 50 Ω to VCC– 2 V.
DESCRIPTIONThe Infineon single mode ATM transceiver complies with the
ATM Forum’s Network Compatible ATM for Local Network
Applications document and ANSI’s Broadband ISDN -
Customer Installation Interfaces, Physical Media Dependent
Specification, T1.646-1995, Bellcore-SONET OC-3/IR-1 and
ITU-T G.957 STM-1/S.1.1.
ATM was developed to facilitate solutions in multimedia appli-
cations and real time transmission. The data rate is scalable,
and the ATM protocol is the basis of the broadband public net-
works being standardized in the International Telecommunica-
tions Union (ITU), the former International Telegraph and
Telephone Consultative Committee (CCITT). ATM can also be
used in local private applications.
This Infineon single mode ATM transceiver is a single unit com-
prised of a transmitter, a receiver, and an SC receptacle. This
design frees the customer from many alignment and PC board
layout concerns. The module is designed for low cost WAN
applications. It can be used as the network end device interface
in workstations, servers, and storage devices, and in a broad
range of network devices such as bridges, routers, and intelli-
gent hubs, and wide area ATM switches.
This transceiver operates at 155.52 Mbit/s from a single power
supply (+3.3 V). The differential data inputs, data outputs and
signal detect output are PECL compatible.
Functional DescriptionThis transceiver is designed to transmit serial data via single
mode cable.
Functional DiagramThe receiver component converts the optical serial data into
PECL compatible electrical data (RxD and RxDn). The Signal
Detect (SD, active high) shows whether an optical signal is
present(1).
This transceiver offers the advantage of an analog Rx power
monitor (RxPMON) that can prove and control link status,
including transmission distances and security of the connec-
tion. This output shows an analog voltage that is proportional to
the light input within the range of -20 dBm to -30 dBm.
The transmitter part converts electrical PECL compatible serial
data (TxD and TxDn) into optical serial data. It contains a laser
driver circuit that drives the modulation and bias current of the
laser diode. The currents are controlled by a power control cir-
cuit to guarantee constant output power of the laser over tem-
perature 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 prevent the laser power from exceeding the operating
limits.
The laser can be switched off with a high signal on the Trans-
mitter Disable pin (TxDIS). The TxPMon pin shows a voltage
reflecting the optical power output. The bias current is moni-
tored on the BIASMON pins. Both signals can be used to super-
vise the function of the module.
Aging control is possible using the bias monitor output (BIAS-
MON). The module has an integrated shutdown function that
switches the laser off in the event of an internal failure.
The transceiver contains a supervisory circuit to control the
power supply. This circuit generates an internal reset signal
whenever the supply voltage drops below thereset threshold.
It keeps the reset signal active for at least 15 milliseconds after
the voltage has risen above the reset threshold. During this
time the laser isinactive.
NoteWe recommend to switch off the transmitter supply (VCC-Tx) if no
transmitter input data is applied.
TECHNICAL DATAThe electro-optical characteristics described in the following
tables are valid only for use under the recommended operating
conditions.
Recommended Operating ConditionsNote
1. For VCC–VEE (min., max.). 50% duty cycle. The supply current does
not include the load drive current of the receiver output. Add max.
45 mA for the three outputs. Load is 50 Ω to VCC– 2 V.
ransmitter Electro-Optical CharacteristicsNotes. Transmitter meets ANSI T1E1.2, SONET OC-3, and ITU-T G.957
maskpatterns.
2. Laser power is shut down if power supply is below VTH and
switched on if power supply is above VTH after tRES. The supervi-
sory circuit can be reset by switching TxDis from high to low.
Receiver Electro-Optical CharacteristicsNotes
1. Minimum average optical power at which the BER is less than
1 x 10-10. Measured with a 223-1 NRZ PRBS as recommended by
ANSI T1E1.2, SONET OC-3, and ITU-T G.957.An increase in optical power of data signal above the specified level
will cause the SIGNAL DETECT to switch from a Low state to a High
state.A decrease in optical power of data signal below the specified level
will cause the SIGNAL DETECT to switch from a High state to a Low
state.
4. PECL compatible. Load is 50 Ω into VCC–2 V. Measured under DC
conditions at 25°C. For dynamic measurements a tolerance of mV should be added. VCC=+3.3 V.
Pin Description
Regulatory Compliance
EYE SAFETYThis laser based single mode transceiver is a Class 1 product. It
complies with IEC 60825-1 and FDA 21 CFR 1040.10 and
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
Published by Infineon Technologies AG
© Infineon Technologies AG 1999
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.
InformationFor 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
WarningsDue 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.
APPLICATION NOTE
Single Mode 155 MBd ATM 2x9 Transceiver* Recommended choke is Siemens Matsushita B78108-S1153-K or B78148-S1153-K (Qmin=60, max. DC resistance =0.6 Ω).
The power supply filtering is recommended for good EMI per-
formance. Use short tracks from the inductor L1/L2 to the mod-
ule VCC-Rx/VCC-Tx. We recommend a VEE plane under the
module for getting good EMI performance. The transceiver con-
tains an automatic shutdown circuit. Reset is only possible
when the power is turned off, and then on again (VCCTx = 0 V).
The receiver data signals should be terminated with 50Ω at the
far end. Terminations should be placed very close to the
receiver data pins in combination with AC coupling.
