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GS2993 Dual Output Adaptive Cable Equalizer

Data Sheet

53966 - 4

August 2012

5 of 23

Propietary & Confidential

8BYPASS

Not

Synchronous

Input

Core Bypass control signal input.

Forces the equalizing and DC restore stages into Bypass mode when

HIGH. No equalization occurs in this mode.

Includes an internal pull-down resistor.

SQ_ADJ

Analog

Input

Squelch Threshold Adjust.

Adjusts the input signal amplitude threshold of the carrier detect

function. The output can be muted when the input signal

amplitude is too low by connecting the CD and OP_CTL pins

together through some external components. In this case, when CD

is LOW (0V), OP1_CTL and/or OP2_CTL are forced LOW (0V), and

when CD is HIGH (2.5V), OP1_CTL and/or OP2_CTL are forced HIGH

(3.3V). The input level at which the part is muted can be set through

the SQ_ADJ pin through suitable voltage variances as described in

Section 4.4. NOTE: when the SQ_ADJ functionality is used and/or in

auto_mute, the auto sleep feature is not allowed, and the SLEEP pin

should be left open.

Includes an internal pull-down resistor.

OP2_EN

Input

Output 2 Enable.

When HIGH, Output 2 is operational.

When LOW, Output 2 is powered-down and the outputs are both at

VCC_O2.

Includes an internal pull down resistor.

OP2_CTL

Not

Synchronous

Input

CONTROL SIGNAL INPUT

Controls the Output Swing, De-emphasis, and Mute features of SDO

and SDO from output 2.

When connected to GND, the output swing is 800mV with no

de-emphasis. When connected to the 3.3V analog power supply, the

output is MUTED.

Includes an internal pull down resistor.

See Section 4.7 for all other control options.

VCC_02

Analog

Power

Most positive power supply connection for the output buffer for

output 2.

Connect to 1.2 – 3.3V.

13, 14

SDO2,

SDO2

Analog

Output

Equalized serial digital differential output 2.

VEE_02

Analog

Power

Most negative power supply connection for the output buffer for

output 2.

Connect to GND.

VEE_01

Analog

Power

Most negative power supply connection for the output buffer for

output 1.

Connect to GND.

17, 18

SDO1,

SDO1

Analog

Output

Equalized serial digital differential output.

VCC_01

Analog

Power

Most positive power supply connection for the output buffer for

output 1.

Connect to 1.2 – 3.3V.

Table 1-1: GS2993 Pin Descriptions (Continued)

Pin Number

Name

Timing

Type

Description

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