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GS2993 bảng dữ liệu(PDF) 5 Page - Gennum Corporation

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Trang chủ  http://www.gennum.com
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GS2993 bảng dữ liệu(HTML) 5 Page - Gennum Corporation

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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.
9
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.
10
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.
11
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.
12
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.
15
VEE_02
Analog
Power
Most negative power supply connection for the output buffer for
output 2.
Connect to GND.
16
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.
19
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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