General Description

The MAX3935 is designed to drive an electro-absorp-

tion modulator (EAM) at data rates up to 10.7Gbps. It

provides programmable output levels through external-

ly adjustable bias and modulation currents. This EAM

driver is fabricated with Maxim’s in-house second-gen-

eration SiGe process.

The MAX3935 accepts differential ECL or ground-refer-

enced CML clock and data-input signals. Inputs are

terminated with on-chip 50

Ω resistors. An input-data

retiming latch can be used to reject input-pattern-

dependent jitter if a clock signal is available.

The driver can modulate EAM devices at amplitudes up

Ω. Typical

(20% to 80%) edge speeds are 34ps. The output has

an on-chip 75

Ω resistor for back termination. The

MAX3935 allows for an EAM bias voltage up to 1.2V.

The MAX3935 also includes an adjustable pulse-width

control circuit to precompensate for asymmetrical EAM

characteristics.

Applications

SONET OC-192 and SDH STM-64

Transmission Systems

DWDM

Metro and Long-Haul Transmitters

Add/Drop Multiplexers

Features

o Single -5.2V Power Supply

o Low 110mA Supply Current

o 34ps Typical Rise/Fall Time

o Up to 10.7Gbps (NRZ) Operation

o On-Chip Termination Resistors

o Programmable EAM Bias Voltage Up to 1.2V

o Adjustable Pulse-Width Control

o Selectable Data Retiming Latch

o Modulation Enable Control

o ESD Protection

10.7Gbps EAM Driver

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

Typical Application Circuit

19-4803; Rev 1; 12/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-PACKAGE

MAX3935EGJ

-40°C to +85°C

32 QFN-EP*

MAX3935E/D

-40°C to +85°C

Dice**

50

Ω

50

Ω

MAX3952

-5.2V

-5.2V

50

Ω

50

Ω

50

Ω

50

Ω

DATA+

DATA-

CLK+

CLK-

DATA+

DATA-

CLK+

CLK-

BIASMON

BIASSET

GND

MAX3935

MODN1

MOD

MODN2

BIAS

MODSET

MODMON

RTEN

MODEN

PWC-

PWC+

-5.2V

2k

Ω

-5.2V

-5.2V

-5.2V

-5.2V

100

Ω

100pF

-5.2V

10Gbps SERIALIZER

L

EAM

REPRESENTS A CONTROLLED–IMPEDANCE TRANSMISSION LINE

*EP = exposed pad.

**Dice are designed to operate over this range, but are tested and

For the latest package outline information, go to

www.maxim-ic.com/packages.

Pin Configuration appears at end of data sheet