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XRT56L85D Datasheet(PDF) 2 Page - Exar Corporation |
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XRT56L85D Datasheet(HTML) 2 Page - Exar Corporation |
2 / 12 page XRT56L85 2 Rev. 2.11 PIN CONFIGURATION 18 1 10 9 2 3 4 5 6 7 15 14 13 12 11 17 16 8 TXVCC TPOS TCLK TXDATA+ TXGND TXDATA- TNEG RPOS PDC RXDATA+ RXDATA- TE BIAS TANK BIAS RXGND RCLK RNEG RXVCC 18 Lead PDIP (0.300”) 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 TXVCC TPOS TCLK TXDATA+ PDC RXDATA+ RXDATA- TE TXGND TXDATA- TNEG RPOS BIAS TANK BIAS RXGND RCLK RNEG RXVCC 18 Lead SOIC (Jedec, 0.300”) PIN DESCRIPTION Pin # Symbol Type Description 1 PDC Peak Detector Capacitor. This pin should be connected to a 0.1µF capacitor 2 RXDATA+ I Receive Analog Input Positive. The AMI signal received from the line is applied at this and the RX DATA(-) pin. Data and clock from the signal applied at these two pins recovered and output on the RPOS, RNEG, and RCLK pins, respectively. 3 RXDATA- I Receive Analog Input Negative. See the description for RX DATA(+). 4 TE O LC Tank Excitation Output. This output connects to one side of the tank circuitry. 5 BIAS O Bias. This pin should be tied to ground through a 0.1µF capacitor. 6 TANK BIAS Tank Reference. The tank circuitry is biased via this output. 7 RXGND Receiver Ground. To minimize ground interference a separate pin is used to ground the re- ceiver section. 8 RCLK O Recovered Receive Clock. Recovered clock signal from the AMI signal received at the RX DATA(+) and RX DATA(-) pins. This signal is output to the terminal equipment. 9 RXVCC Receive Supply Voltage. 5V supply voltage for the Receive Section. 10 RNEG O Receive Negative Data Output. A signal at this pin corresponds to the receipt of a negative pulse on the RX DATA(+)/RX DATA(-) pins. This TTL compatible signal is output to the terminal equipment. 11 RPOS O Receive Positive Data Output. A signal at this pin corresponds to the receipt of a positive pulse on the RX DATA(+)/RX DATA pins. This TTL compatible signal is outputed to the terminal equipment. 12 TNEG I Transmit Negative Data Input. TTL input for a negative polarity pulse (the negative portion of the AMI pulse train) to be transmitted to the line via the TX DATA(+) and TX DATA pins. 13 TXDATA- O Transmit Negative Data Output. This pin, along with the TX DATA(+) pin, forms a differential driver output, this is used to drive AMI data down the line via a transformer. Note: This is an open-collector output. 14 TXGND Transmit Ground. 15 TXDATA+ O Transmit Positive Data Output. Please see description for TX DATA(-). 16 TCLK I Transmit Clock. TPOS and TNEG are sampled on the rising edge of TCLK. 17 TPOS I Transmit Positive Data Input. TTL input for a positive polarity pulse (the positive portion of the AMI pulse train) to be transmitted to the line via the TX DATA(+) and TX DATA(-) pins. 18 TXVcc Transmit Supply Voltage. 5V supply voltage to the transmit section. |
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