SY88432L Datasheet, PDF (1/15 Pages) Micrel Semiconductor – 4.25 Gbps Transceiver with Integrated FP/DFP Laser Diode Driver and Limiting Post Amplifier

SY88432L
4.25 Gbps Transceiver with Integrated FP/DFP Laser
Diode Driver and Limiting Post Amplifier
General Description
The SY88432L is a low power transceiver device that
integrates a 4.25Gbps FP/DFB laser diode driver with a
wide-sensitivity limiting post amplifier. This low power
device is designed for use in fiber-optic optical modules
for multi-rate applications up to 4.25Gbps.
The SY88432L transmitter section can output up to
60mA of modulation current with fast rise and fall times
and is designed to be AC-coupled to the laser. The
transmitter output stage incorporates a transmit disable
feature and integrated 50Ω input impedance referenced
to V_CC.
The receiver section’s limiting post amplifier connects to
a typical trans-impedance amplifier (TIA) to amplify the
incoming weak signal from the ROSA and outputs
normalized received data in CML format at the output.
The receiver offers a wide LOS (Loss Of Signal) Assert
range between 8mV_PP to 40mV_PP differential. A
programmable loss-of-signal level set pin (LOSLVL) sets
the sensitivity of the input amplitude detection. The LOS
or SD (signal-detect) is user selectable and the LOS/SD
signal can be fed back to the JAM input to implement
the SQUELCH function that maintains output stability
under a loss-of-signal condition. The receiver input
should be AC-coupled.
The SY88432L interfaces with Micrel’s highly advanced
optical module controller MIC3003 as an easy-to-use
chipset solution for CSFP/SFP/CSFF/SFF optical
module applications. The MIC3003 allows for both
modulation and bias current control, with automatic
power control (APC) and temperature compensation.
The SY88432L operates on a single 3.3V power supply
and is available in a 24 lead, 4x4mm QFN package.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Features
 Multi-rate operation up to 4.25Gbps
 Single, wide range power supply: 3.3V 10%
 Industrial temp range: -40°C to +85°C
 MIC3003 compatible
Transmitter – FP/DFP Laser Diode Driver
 Modulation current up to 60mA
- AC coupled laser diode modulation
- Voltage controlled modulation current
 Rise/Fall times 65ps (typical)
 TX Disable with internal 75kΩ pull down resistor
 Integrated 50Ω input impedance to V_CC
Receiver – Limiting Post Amplifier
 Wide differential input range (10mVpp – 1800mVpp)
 Programmable LOS level (LOSLVL) sensitivity
 Wide LOS Assert range (8mVpp – 40mVpp)
- With 3.5dB typical electrical hysteresis
 Selectable LOS or SD output
 TTL compatible JAM input with internal pull up
 Low-noise CML data outputs with integrated 50Ω
termination impedance
- Rise/Fall times 60ps (typical)
 Low-noise CML data inputs with integrated 50Ω
termination impedance to internal reference V_REF
Applications
 Gigabit Ethernet
 Fibre Channel – 1FC, 2FC, 4FC
 SONET OC3/12/24/48 and with FEC
 SDH STM1/4/8/16 and with FEC
Markets
 Datacom / Telecom / Storage
 Compact SFP/SFF Optical transceiver
 SFP/SFF Optical transceiver
 Wireless backhaul
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA tel [phone] • fax + 1 [phone] • http://www.micrel.com
July 2012
M9999-061312-A
[e-mail] or [phone]