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XRT7295AEIW Datasheet(PDF) 3 Page - Exar Corporation |
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XRT7295AEIW Datasheet(HTML) 3 Page - Exar Corporation |
3 / 15 page XRT7295AE 3 Rev. 2.0.0 PIN DESCRIPTION Pin # Symbol Type Description 1 GNDA Analog Ground. 2 R IN I Receive Input. Unbalanced analog receive input 3,6 TMC1-TMC2 I Test Mode Control 1 and 2. Internal test modes are enabled within the device by using TMC1 and TMC2. Users must tie these pins to the ground plane. 4,5 LPF-1-LPF-2 I PLL Filter 1 and 2. An external capacitor (0.1 µF +/-20%) is connected between these pins (See Figure 3). 7 RLOS O Receive Loss-of-Signal. This pin is set high on loss of signal at the receive input. 8 RLOL O Receive PLL Loss-of-Lock. This pin is set high on loss of PLL frequency lock. 9 GNDD Digital Ground for PLL Lock. Ground lead for all circuitry running synchronously with PLL clock. 10 GNDC Digital Ground for EXCLK. Ground lead for all circuitry running synchronously with EXCLK. 11 V DDD 5V Digital Supply (+/-10%) for PLL Clock. Power for all circuitry running synchronously with PLL clock. 12 V DDC 5V Digital Supply (+/-10%) for EXCLK. Power for all circuitry running synchronously with EXCLK. 13 EXCLK I External Reference Clock. A valid E3 (34.368MHz +/-100ppm) clock must be provided at this input. The duty cycle of EXCLK, referenced to V DD/2 levels, must be 40%-60%. 14 RCLK O Receive Clock. Recovered clock signal to the terminal equipment. 15 RNDATA O Receive Negative Data. Negative pulse data output to the terminal equipment. 16 RPDATA O Receive Positive Data. Positive pulse data output to the terminal equipment. 17 ICT I Output In-Circuit Test Control (Active-Low). If ICT is forced low, all digital output pins (RCLK, RPDATA, RNDATA, RLOS, RLOL) are placed in a high- impedance state to allow for in-circuit testing. 18 REQB I Receive Equalization Bypass. A high on this pin bypasses the internal equalizer. A low places the equalizer in the data path. 19 LOSTHR I Loss-of-Signal Threshold Control. The voltage forced on this pin controls the input loss-of-signal threshold. Three settings are provided by forcing the GND, V DD/2, or VDD at LOSTHR. 20 V DDA 5V Analog Supply (+/-10%). |
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