5V 155Mbps LASER DIODE
DRIVER WITH OUTPUT ENABLE
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
s 155Mbps SONET
The SY88802 is a high speed current switch for driving
a semiconductor laser diode in optical transmission
applications. The modulation current (IOUT) is controlled
by the current (IRSET) through the external resistor RSET.
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 REXT must be placed between
/OUT and VCC to dissipate the worst case power. RSER
is recommended to compensate for laser diode matching
The SY88802 utilizes the high performance bipolar
FUNCTIONAL BLOCK DIAGRAM
to Laser Diode
ASSET is a trademark of Micrel, Inc.
Rev.: A Amendment: /0
Issue Date: March 2003