2

SY88922

Micrel

Pin

Function

Most positive power supply input, +5V for PECL

operation.

GND

Ground

These differential PECL 100K compatible inputs

receive NRZ data.

/EN

This PECL 100K compatible input enables

Laser Driver. Modulation current goes to zero

when asserted HIGH.

OUT, /OUT

Open collector outputs from the modulation

buffer drive these differential current outputs.

An external resistor sets up the source current

D

D

/EN

/OUT

LH

LH

L

H

LLL

H

XX

H

H

L

NOTES:

1. L = LOW, H = HIGH, X = don't care

PIN NAMES

Symbol

Rating

Value

Unit

Power Supply Voltage

0 to +7.0

V

Input Voltage

V

Output Current

25

mA

Operating Temperature Range

0 to +85

°C

Storage Temperature Range

–55 to +125

°C

Power Dissipation

250

mW

NOTE:

1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation is not implied

at conditions other than those detailed in the operational sections of this data sheet. Exposure to ABSOLUTE MAXIMUM RATlNG conditions for extended

periods may affect device reliability.

Symbol

Rating

Value

Unit

Power Supply Voltage

+4.5 to +5.5

V

Resistor to Dissipate Power

10 to 50

Ω

Laser Diode Serial Resistor

0 to 50

Ω

Resistor to Adjust Current

1500 to 50,000

Ω

ΘJA

113

°C/W

Capacitance on OUT + /OUT

2.5 typical

pf

NOTES:

2. Still air without heatsink.