SY100EL1001_06 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – LASER DIODE DRIVER WITH INPUT D FLIP-FLOP

Micrel, Inc.
LASER DIODE DRIVER
WITH INPUT D FLIP-FLOP
SY100EL1001
SY100EL1001
FEATURES
s Up to 1.25Gb/s operation
s 75mA peak drive current
s Separate modulation control
s Separate master reset for laser safety
s Differential inputs for data and clock
s 75KΩ input pulldown resistor
s Single power supply
s Available in 16-pin SOIC package
DESCRIPTION
The SY100EL1001 is a high speed current source for
driving a semiconductor laser diode in optical transmission
applications. The output current modulation is DC –
voltage controlled. The integrated circuit contains the
following functional blocks:
• Input Line Receiver
• D Flip-Flop
• Bias Control Circuitry
• Output Current Switch
A logic HIGH level at the data input results in the
modulation current flowing through the OUT pin on the
next rising edge of the clock. A logic HIGH level at the
master reset input will disable the modulation current.
The device incorporates complementary open collector
outputs with a capability of driving peak current of 75
mA.
The laser driver current is adjustable by selection of
RSET. The resistor REXT must be placed between /OUT
and VCC to dissipate the worst case power. RSER is
recommended to fix laser diode matching issues.
The SY100EL1001 utilizes the high performance
bipolar ASSET™ technology.
BLOCK DIAGRAM
D, D
CLK, CLK
MR
VCC
REXT
VBB
OUT
D Flip-Flop
BIAS
Control
Modulation Control
MC
RSET
VEE
OUT
RSER
to Laser Diode
ASSET is a trademark of Micrel, Inc.
M9999-031306
[e-mail] or [phone]
11
Rev.: I
Amendment: /0
Issue Date: March 2006