02044-DSH-002-A

Mindspeed Technologies™

7

Mindspeed Proprietary and Confidential

3.0 Functional Description

3.1

Overview

The M02044 is a highly integrated high-gain limiting amplifier that can be used with the same board layout and

footprint as the MC2044C. Featuring PECL outputs, the M02044 is intended for use in applications from 100 Mbps

to 622 Mbps. Full output swing is achieved even at minimum input sensitivity. The M02044 can operate with a 3.3V

or 5V supply.

Included in the M02044 is a programmable signal-level detector, allowing the user to set thresholds at which the

logic outputs are enabled. The signal detect function has typically 2 dB (optical) of hysteresis which prevents

chatter at low input levels. A squelch function, which turns off the output when no signal is present, is provided by

externally connecting the LOS Status output to the JAM input.

The M02044 has CMOS Status and LOS outputs.

Figure 3-1.

Block Diagram Example

Level

Detect

Limiting

Amplifier

Comparator

DINN

DINP

PECLN

PECLP

Offset cancel

Output

Buffer

Threshold

Setting

Circuit

Regulator

Biasing

I

REF

Jam

V

TT

ST

LOS