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
VCC
Analog
Analog
Power
Power
Most positive power supply connection.
Connect to +3.3V DC.
3, 6, 11, 14
VEE
Most negative power supply connection.
Connect to GND.
4, 5
7, 8
SDI, SDI
Analog
Analog
Input
–
Serial digital differential input.
AGC+,
AGC-
External AGC capacitor.
Connect pin 7 and pin 8 together through a 1uF capacitor.
9
BYPASS
Not
Synchronous
Input
Input
Forces the Equalizing and DC RESTORE stages into bypass mode
when HIGH. No equalization occurs in this mode.
10
MCLADJ
Analog
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
16
SDO, SDO
CD/MUTE
Analog
Output
Equalized serial digital differential output.
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.
GS1524A Adaptive Cable Equalizer
Data Sheet
5 of 16
28852 - 5
June 2009
GENNUM [ GENNUM CORPORATION ]
