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XRT83VL38 Datasheet(PDF) 11 Page - Exar Corporation |
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XRT83VL38 Datasheet(HTML) 11 Page - Exar Corporation |
11 / 88 page XRT83VL38 7 REV. 1.0.0 OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR TRANSMITTER SECTIONS RXRES1 RXRES0 R10 V10 I Receive External Resistor Control Pins - Hardware mode Receive External Resistor Control Pin 1: Receive External Resistor Control Pin 0: These pins determine the value of the external Receive fixed resistor according to the following table: NOTE: These pins are internally pulled “Low” with a 50k resistor. RCLKE µPTS1 J16 J16 I Receive Clock Edge - Hardware mode Set this pin “High” to sample RPOS_N/RNEG_n on the falling edge of RCLK_n. With this pin tied “Low”, output data are updated on the rising edge of RCLK_n. Microprocessor Type Select Input pin 1 - Host mode This pin along with µPTS2 (pin 128) is used to select the microprocessor type. SEE”MICROPROCESSOR TYPE SELECT INPUT PINS - HOST MODE:” ON PAGE 12. NOTE: This pin is internally pulled “Low” with a 50k resistor. SIGNAL NAME LEAD # TYPE DESCRIPTION TCLKE µPTS2 L15 L15 I Transmit Clock Edge - Hardware mode Set this pin “High” to sample transmit input data on the rising edge of TCLK_n. With this pin tied “Low”, input data are sampled on the falling edge of TCLK_n. Microprocessor Type Select Input pin 2 - Host mode This pin along with µPTS1 (pin 133) selects the microprocessor type. SEE”MICRO- PROCESSOR TYPE SELECT INPUT PINS - HOST MODE:” ON PAGE 12. NOTE: This pin is internally pulled “Low” with a 50k resistor. TTIP_0 TTIP_1 TTIP_2 TTIP_3 TTIP_4 TTIP_5 TTIP_6 TTIP_7 E3 G4 F17 C16 R2 N2 N16 P16 O Transmitter Tip Output for Channel _0 Positive differential transmit output to the line. Transmitter Tip Output for Channel _1 Transmitter Tip Output for Channel _2 Transmitter Tip Output for Channel _3 Transmitter Tip Output for Channel _4 Transmitter Tip Output for Channel _5 Transmitter Tip Output for Channel _6 Transmitter Tip Output for Channel _7 SIGNAL NAME LEAD #TYPE DESCRIPTION RXRES1 0 0 Required Fixed External RX Resistor No External Fixed Resistor 240 RXRES0 0 1 1 1 210 150 0 1 |
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