GS3441 Datasheet, PDF (6/25 Pages) Semtech Corporation – Extended Reach 3G/HD/SD Adaptive Cable Equalizer with Dual Outputs

Table 1-1: GS3441 Pin Descriptions (Continued)
Pin Number
Name
Timing
Type
19
VCC_O1
Analog
Power
20
OP1_CTL
Not
Synchronous
Input
21
OP1_EN
—
Input
22
CLI
—
Output
23
SLEEP
Not
Synchronous
Input
24
CD
Not
Synchronous
Output
—
Center Pad
—
Power
Description
Most positive power supply connection for the output buffer for
output 1.
Connect to 1.2 - 3.3V DC.
Controls the Output Swing, De-emphasis and Mute features of the
DDO/DDO outputs for Output 1.
When this pin is connected to GND, the output swing is 800mV_ppd
with no de-emphasis applied to the output signal.
With this pin connected to the 2.5V, the output is MUTED.
Intermediate voltages and functions are shown in Table 4-5. These
voltages can be achieved as shown in Figure 4-2 and Figure 4-3.
This pin has an internal pull-down resistor.
Output 1 Enable.
Please refer to the input logic parameter in the DC Electrical
Characteristics table for logic level threshold and compatibility.
When HIGH, Output 1 is operational.
When LOW, Output 1 is powered-down and the outputs are both at
VCC_O1.
This pin has an internal pull-up resistor.
Cable Length Indicator
SLEEP Control.
Please refer to the input logic parameter in the DC Electrical
Characteristics table for logic level threshold and compatibility. This
pin is a 2.5V input that is tolerant to 3.3V levels.
When HIGH the part is powered-down except for the Carrier Detect
function.
This pin may be connected directly to the CD pin to automatically
put the device to sleep (low-power operation) on loss of carrier.
This pin has an internal pull-down resistor.
Note: When SLEEP is connected to CD for automatic power
reduction on loss of carrier, the SQ_ADJ pin will not modify the CD
threshold. The CD threshold will revert to the default value used
when SQ_ADJ is pulled LOW.
Carrier Detect Status Output.
Please refer to the output logic parameter in the DC Electrical
Characteristics table for logic level threshold and compatibility. This
pin is a 2.5V output.
Indicates presence of an input signal. When the CD pin is LOW, a
signal has been detected at the input. When this pin is HIGH, it
indicates loss of input signal.
Internally bonded to VEE_A.
Connect to GND with at least 5 VIAs.
GS3441 Extended Reach 3G/HD/SD Adaptive Cable
Equalizer with Dual Outputs
Final Data Sheet Rev. 1
GENDOC-056647 May 2013
www.semtech.com
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