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GS2993 Scheda tecnica(PDF) 5 Page - Semtech Corporation |
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GS2993 Scheda tecnica(HTML) 5 Page - Semtech Corporation |
5 / 23 page 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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