SY88912L Datasheet, PDF (1/5 Pages) Micrel Semiconductor – 3.3V 3.2Gbps SONET/SDH LASER DRIVER

Micrel, Inc.
3.3V 3.2Gbps SONET/SDH
LASER DRIVER
SY88912L
SY88912L
FEATURES
s Up to 3.2Gbps operation
s Modulation current to 60mA
s Rise/Fall times <70PS
s Single 3.3V power supply
s Programmable laser modulation current
s Operating temperature range of –40°C to 85°C
s Available in tiny 16-pin MLF™ package
APPLICATIONS
s Fiber optical module
s Transponder
s XAUI CWDM
s SONET/SDH transmission system
s Add-drop mux
s Metro area network
s 2.5Gbps optical transmitter
BLOCK DIAGRAM
DESCRIPTION
The SY88912L is the smallest laser driver with
programmable modulation current for SONET/SDH
applications up to 3.2Gbps. The device accepts either
PECL or CML level data inputs. The SY88912L provides
modulation current of up to 60mA for FP (Fabry-Perot) or
DFB (Distributed Feedback) laser.
There is a 75kΩ pull-down resistor to V_EE at the input of
/EN. An active low PECL enable signal shuts off modulation
current.
V_CC
R_EXT
/OUT
Internal
D_IN
Logic
/D_IN
/EN
BIAS
Control
I_MOD
V_REF
R_SET
R_SET ^GND
V_CC
V_CC
OUT
V_CC
I_BIAS
GND
MLF and Micro LeadFrame are trademarks of Amkor Technology, Inc.
M9999-081005
[e-mail] or [phone]
1
Rev.: B Amendment: /0
Issue Date: August 2005