GS1524A Adaptive Cable Equalizer

Data Sheet

28852 - 5

June 2009

5 of 16

1.2 GS1524A Pin Descriptions

Table 1-1: GS1524A Pin Descriptions

Pin Number

Name

Timing

Type

Description

1

CLI

Analog

Output

Cable Length Indicator.

An analog voltage will be output proportional to the cable length

connected to the serial digital input.

NOTE: CLI is recommended for data rates up the 360Mb/s only.

2, 15

Analog

Power

Most positive power supply connection.

Connect to +3.3V DC.

3, 6, 11, 14

Analog

Power

Most negative power supply connection.

Connect to GND.

4, 5

SDI, SDI

Analog

Input

Serial digital differential input.

7, 8

AGC+,

AGC-

Analog

–

External AGC capacitor.

Connect pin 7 and pin 8 together through a 1uF capacitor.

9BYPASS

Not

Synchronous

Input

Forces the Equalizing and DC RESTORE stages into bypass mode

when HIGH. No equalization occurs in this mode.

10

MCLADJ

Analog

Input

Maximum cable length adjust.

Adjusts the approximate maximum amount of cable to be equalized

(from 0m to the maximum cable length). The output is muted

(latched to the last state) when the maximum cable length is

achieved.

NOTE: MCLADJ is only recommended for data rates up to 360Mb/s.

12, 13

SDO, SDO

Analog

Output

Equalized serial digital differential output.

16

CD/MUTE

Not

Synchronous

Bidirectiona

l

STATUS SIGNAL OUTPUT / CONTROL SIGNAL INPUT

levels are LVCMOS/LVTTL compatible.

OUTPUT (CD):

Indicates the presence of a valid input signal. When the CD pin is

LOW, a valid input signal has been detected. When this pin is HIGH,

the input signal is invalid. If CD is set HIGH, the serial digital output

of the device will be forced to a steady state (latched to the last

state).

NOTE: This pin will indicate loss of carrier for data rates > 19Mb/s.

INPUT (MUTE):

When the MUTE pin is set HIGH by the application interface, the

serial digital output of the device will be forced to a steady state

(latched to the last state). When the MUTE pin is set LOW, the serial

digital output of the device will be active.

NOTE: The CD/MUTE pin is not functional when BYPASS is set HIGH.