GS3490 Datasheet, PDF (4/22 Pages) Semtech Corporation – Configurable Adaptive Cable Equalizer/Cable Driver

Table 1-1: GS3490 Pin Descriptions (Continued)
Pin Number
Name
Type
8
EQ_GAIN_SEL
Input
9, 10
AGC/AGC
—
12
NC
—
13
EQ_BYPASS
Input
14
EQ_SQ_ADJ
Input
15
EQ_OP_CTL
Input
16
17, 26, 31, 32
18, 19
22, 23
27
28
CD_SD_EN
VCC
DDI/DDI
DDO/DDO
RSET
EQ_DISABLE
Input
Power
Input
Output
—
Input
Description
Input Sensitivity Control.
Please refer to the input logic parameter in Table 2-2: DC
Electrical Characteristics for logic level threshold and
compatibility. This pin is a 3.3V input.
When HIGH, the device compensates for an additional 6dB
of loss across the entire operating band.
This pin has an internal 100kΩ pull-down resistor.
External AGC capacitor connection.
No Connect. Not bonded internally.
Equalizer Bypass Control.
Please refer to the input logic parameter in Table 2-2 for
Logic Level threshold and compatibility.
For details on operation, refer to Section 4.1.3.
This pin has an internal 100kΩ pull-down resistor.
Squelch Threshold Adjust.
For details on operation, refer to Section 4.1.5.
This pin has an internal 82.4kΩ pull-down resistor.
Controls the Output Swing, De-emphasis and Mute
features of the DDO/DDO outputs.
For details on operation, refer to Section 4.1.7.
This pin has an internal 1MΩ pull-down resistor.
Cable Driver Slew Rate Control.
For details on operation, refer to Section 4.2.4.
When left unconnected, the default state of this pin is logic
HIGH
Most positive power supply connection.
Connect to 3.3V DC.
Differential digital data input to cable driver core.
Differential digital data output from cable equalizer core.
External cable driver output amplitude control resistor
connection.
Equalizer Mode Disable Control.
Please refer to the input logic parameter in Table 2-2 for
logic level threshold and compatibility.
For details on operation, refer to Section 4.1.1.
This pin has an internal 100kΩ pull-down resistor.
GS3490
Final Data Sheet
GENDOC-058568
Rev. 1
April 2014
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