SY88922VKC(2000) Ver la hoja de datos (PDF) - Micrel
Número de pieza
componentes Descripción
Fabricante
| SY88922VKC Datasheet PDF : 0 Pages | |||
5V/3.3V 2.5Gbps
LASER DIODE DRIVER
SY88922V
FINAL
FEATURES
s 3.3V and 5V power supply options
s Up to 2.5Gbps operation
s 30mA modulation current
s Separate modulation control
s Separate output enable for laser safety
s Differential inputs for data
s 75KΩ input pulldown resistor
s Available in a tiny 10-pin (3mm) MSOP
PIN CONFIGURATIONS
/EN 1
DIN 2
/DIN 3
VREF 4
RSET 5
MSOP
K10-1
10 OUT
9 OUT
8 /OUT
7 GND
6 VCC
DESCRIPTION
The SY88922V is a high speed current switch for
driving a semiconductor laser diode in optical transmission
applications. The output current, or modulation current
IMOD, is DC current controlled by IRSET, current through
the resistor RSET. The output OUT is HIGH when output
enable is HIGH.
The device incorporates complementary open collector
outputs with a capability of driving peak current of 30mA.
The resistor REXT must be placed between /OUT and
VCC to dissipate the worst case power. RSER is
recommended to compensate for laser diode matching
issues. Pin 9 and pin 10 should be connected to achieve
better performance.
The SY88922V utilizes the high performance bipolar
ASSET™ technology.
APPLICATIONS
s 1.25Gbps and 2.5Gpbs Gigabit Ethernet
s 531Mbps, 1062Mbps and 2.12Gbps Fibre Channel
s 622Mbps SONET
s Gigabit Interface Converter
s 2.5Gbps SDH/SONET
s 2.5Gbps Proprietary Links
BLOCK DIAGRAM
VCC
REXT
/OUT
OUT
DIN
Internal Logic
/DIN
/EN
BIAS
Control
IMOD
40X
VREF
Modulation Control
GND
RSET
RSER
to Laser Diode
VCC
GND
RSET
1
Rev.: B Amendment: /0
Issue Date: August 2000
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