SY88432L
4.25 Gbps Transceiver with Integrated FP/DFP Laser
Diode Driver and Limiting Post Amplifier
General Description
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
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 VCC.
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)
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.
TX Disable with internal 75kΩ pull down resistor
Integrated 50Ω input impedance to VCC
Receiver – Limiting Post Amplifier
The receiver offers a wide LOS (Loss Of Signal) Assert
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
range between 8mVPP to 40mVPP 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.
TTL compatible JAM input with internal pull up
Low-noise CML data outputs with integrated 50Ω
termination impedance
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.
- Rise/Fall times 60ps (typical)
Low-noise CML data inputs with integrated 50Ω
termination impedance to internal reference VREF
Applications
The SY88432L operates on a single 3.3V power supply
and is available in a 24 lead, 4x4mm QFN package.
Gigabit Ethernet
Fibre Channel – 1FC, 2FC, 4FC
SONET OC3/12/24/48 and with FEC
SDH STM1/4/8/16 and with FEC
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
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 +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-061312-A
hbwhelp@micrel.com or (408) 955-1690
July 2012