SY88802 Datasheet, PDF (1/5 Pages) Micrel Semiconductor – 5V 155Mbps LASER DIODE DRIVER WITH OUTPUT ENABLE

Micrel
5V 155Mbps LASER DIODE
DRIVER WITH OUTPUT ENABLE
SY88802
SY88802
FEATURES
s Up to 155Mbps operation
s Modulation current to 25mA
s PECL output enable
s Differential PECL inputs
s Single 5V power supply
s Available in a tiny 10-pin (3mm) MSOP
APPLICATIONS
s 155Mbps SONET
DESCRIPTION
The SY88802 is a high speed current switch for driving
a semiconductor laser diode in optical transmission
applications. The modulation current (I_OUT) is controlled
by the current (I_RSET) through the external resistor R_SET.
The output OUT is HIGH and no current flows through
OUT when output enable is HIGH.
The device incorporates complementary open collector
outputs with 25mA maximum current driving capability.
The external resistor R_EXT must be placed between
/OUT and V_CC to dissipate the worst case power. R_SER
is recommended to compensate for laser diode matching
issues.
The SY88802 utilizes the high performance bipolar
ASSET™ technology.
FUNCTIONAL BLOCK DIAGRAM
V_CC
R_EXT
/OUT
DIN
/DIN
/EN
Internal
Logic
I_MOD
40X
V_REF
R_SET
V_EE
R_SET
OUT
R_SER
to Laser Diode
V_CC
GND
ASSET is a trademark of Micrel, Inc.
1
Rev.: A Amendment: /0
Issue Date: March 2003