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GS3441-INTE3 bảng dữ liệu(PDF) 5 Page - Semtech Corporation |
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GS3441-INTE3 bảng dữ liệu(HTML) 5 Page - Semtech Corporation |
5 / 25 page GS3441 Extended Reach 3G/HD/SD Adaptive Cable Equalizer with Dual Outputs Final Data Sheet Rev. 1 GENDOC-056647 May 2013 5 of 25 Proprietary & Confidential www.semtech.com 6, 7 AGC, AGC Analog — External AGC capacitor connection. 8BYPASS Not Synchronous Input Core Bypass 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. Forces the equalizer and DC-restore stages into Bypass mode when HIGH. No equalization occurs in this mode. This pin has 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 serial data output of the device can be muted when the serial data input signal amplitude is too low by connecting the CD and OPn_CTL pins via suitable resistor networks (see Figure 4-2 and Figure 4-3). This pin has an internal pull-down resistor. Note: The SQ_ADJ function is only available when the device is not in auto-sleep mode. Reference Section 4.5 for more detail. 10 OP2_EN — Input Output 2 Enable. Please refer to the input logic parameter in the DC Electrical Characteristics table for logic level threshold and compatibility. When HIGH, Output 2 is operational. When LOW, Output 2 is powered-down and the outputs are both at VCC_O2. This pin has an internal pull-down resistor. 11 OP2_CTL Not Synchronous Input Controls the Output Swing, De-emphasis and Mute features of the DDO/DDO outputs for Output 2. When this pin is connected to GND, the output swing is 850mVppd with no de-emphasis. With this pin connected to a 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. 12 VCC_O2 Analog Power Most positive power supply connection for the output buffer for output 2. Connect to 1.2 - 3.3V DC. 13, 14 DDO2, DDO2 Analog Output Serial digital differential output 2. 15 VEE_O2 Analog Power Most negative power supply connection for the output buffer for output 2. Connect to GND. 16 VEE_O1 Analog Power Most negative power supply connection for the output buffer for output 1. Connect to GND. 17, 18 DDO1, DDO1 Analog Output Serial digital differential output 1. Table 1-1: GS3441 Pin Descriptions (Continued) Pin Number Name Timing Type Description |
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