SY100EL1001 Datasheet, PDF (1/6 Pages) Micrel Semiconductor – LASER DIODE DRIVER WITH INPUT D FLIP-FLOP

LASER DIODE DRIVER
WITH INPUT D FLIP-FLOP
PRELIMINARY
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
PIN CONFIGURATION
NC 1
CLK 2
CLK 3
RSET 4
VCCO 5
D6
D⁷
MR 8
Top View
SOIC
Z16-2
16 _VCC
15 NC
14 MC
13 _OUT
12 OUT
11 VBB
10 _NC
9 VEE
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
1
RSET
VEE
OUT
RSER
to Laser Diode
Rev.: E Amendment: /0
Issue Date: August, 1998