GS2993 Datasheet, PDF (6/23 Pages) Gennum Corporation – Automatic power-down on loss of signal

Table 1-1: GS2993 Pin Descriptions (Continued)
Pin Number
20
Name
OP1_CTL
Timing
Type
Input
21
OP1_EN
Input
22
CLI
Output
23
SLEEP
Not
Input
Synchronous
24
CD
Not
Output
Synchronous
–
Center Pad
–
Power
Description
CONTROL SIGNAL INPUT
Controls the Output Swing, De-emphasis, and Mute features of SDO
and SDO from output 1.
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.
Output 1 Enable.
When HIGH, Output 1 is operational.
When LOW, Output 1 is powered-down and the outputs are both at
VCC_O1.
Includes an internal pull up resistor.
Cable Length Indicator.
CONTROL SIGNAL INPUT
When set HIGH, the GS2993 is powered-down except for the Carrier
Detect functionality.
Includes an internal pull-down resistor.
Carrier Detect status signal output.
Signal levels are LVCMOS/LVTTL compatible.
Indicates presence of a good input signal. When the CD pin is LOW,
a good input signal has been detected. When this pin is HIGH, the
input signal is invalid.
This pin will indicate loss of carrier for all supported data rates.
Internally bonded to VEE_A.
GS2993 Dual Output Adaptive Cable Equalizer
Data Sheet
53966 - 4
August 2012
6 of 23
Propietary & Confidential