SY88922VKG データシートの表示（PDF） - Micrel
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SY88922VKG Datasheet PDF : 5 Pages
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Micrel, Inc.
5V/3.3V 2.5Gbps
LASER DIODE DRIVER
SY88922V
SY88922V
FEATURES
■ Up to 2.5Gbps operation
■ 30mA modulation current
■ Separate modulation control
■ Separate output enable for laser safety
■ Differential inputs for data
■ 75KΩ input pull-down resistor
■ 3.3V and 5V power supply options
■ Available in a tiny 10-pin (3mm × 3mm) MSOP
APPLICATIONS
■ 1.25Gbps and 2.5Gpbs Gigabit Ethernet
■ 531Mbps, 1062Mbps and 2.12Gbps Fibre Channel
■ 622Mbps SONET
■ Gigabit Interface Converter
■ 2.5Gbps SDH/SONET
■ 2.5Gbps Proprietary Links
DESCRIPTION
The SY88922V 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 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.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
BLOCK DIAGRAM
VCC
REXT
/OUT
DIN
/DIN
/EN
ASSET is a trademark of Micrel, Inc.
M9999-091906
hbwhelp@micrel.com or (408) 955-1690
Internal Logic
BIAS
Control
IMOD
40X
VREF
Modulation Control
GND
RSET
RSET
1
OUT
RSER
to Laser Diode
VCC
GND
Rev.: F Amendment: /0
Issue Date: September 2006
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