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GS6042 Datasheet(PDF) 5 Page - Gennum Corporation |
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GS6042 Datasheet(HTML) 5 Page - Gennum Corporation |
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5 / 21 page  GS6042 Final Data Sheet Rev. 3 PDS-060055 May 2014 5 of 21 Proprietary and Confidential www.semtech.com 8SQ_ADJ 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 OP_CTL pins using a suitable resistor network (see Figure 4-4 and Figure 4-5). This pin has an internal pull-down resistor. Note: The SQ_ADJ function is only available when the device is not configured for auto-sleep mode. Reference Section 4.5 for more detail. 9OP_CTL Input Output Swing, De-emphasis and Mute Control. When this pin is connected to GND, the output swing is 850mVppd with no de-emphasis applied to the output signal. With this pin connected to +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 4-4 and Figure 4-5. This pin has an internal pull-down resistor. 10, 11 DDO, DDO Output Serial digital differential output. 12 VEE_O Power Most negative power supply connection for the output buffer. Connect to ground. 13 VCC_O Power Most positive power supply connection for the output buffer. Connect to 1.2V - 3.3V DC. 14 SLEEP Input SLEEP Control. Please refer to 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 can 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. 15 CD Output Carrier Detect Status Output. Please refer to 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, this indicates loss of input signal. 16 VCC_A Power Most positive power supply connection for the input buffer, core and control circuits. Connect to +3.3V DC. — Center Pad Power Internally bonded to VEE_A. Connect to GND with at least 5 vias. Table 1-1: GS6042 Pin Descriptions (Continued) Pin Number Name Type Description |
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