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XRT91L34IV Datasheet(PDF) 9 Page - Exar Corporation |
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XRT91L34IV Datasheet(HTML) 9 Page - Exar Corporation |
9 / 38 page XRT91L34 9 REV. 1.0.1 QUAD CHANNEL MULTIRATE STS-12/3/1 AND STM-4/1/0 SONET/SDH CDR RECEIVER SECTION NAME LEVEL TYPE PIN DESCRIPTION RXDI0P RXDI0N RXDI1P RXDI1N RXDI2P RXDI2N RXDI3P RXDI3N LVDS, Diff LVPECL I 3 4 11 12 22 21 30 29 Receive Serial Data Input The differential receive serial data stream of 622.08 Mbps STS-12/STM-1 or 155.52 Mbps STS-3/STM-1 or 51.84 Mbps STS-1/STM-0 is applied to these differential input pins. These pins accept LVDS or Differential LVPECL input standard. These pins are internally biased to 1.2V via 15k Ω resistance and are equipped with a 100 Ω line-to-line internal termination. RXDO0P RXDO0N RXDO1P RXDO1N RXDO2P RXDO2N RXDO3P RXDO3N LVDS, Diff LVPECL O 94 93 86 85 75 76 67 68 Recovered Serial Data Output 622.08 Mbps STS-12/STM-4 / 155.52 Mbps STS-3/STM-1 / 51.84 Mbps STS-1/STM-0 differential recovered serial data out- put that is updated simultaneously on the falling edge of the corresponding channel RXCLKO output. User selectable LVDS standard or Differential LVPECL standard output based on OUTCFG pin state. RXCLKO0P RXCLKO0N RXCLKO1P RXCLKO1N RXCLKO2P RXCLKO2N RXCLKO3P RXCLKO3N LVDS, Diff LVPECL O 90 89 82 81 79 80 71 72 Recovered Clock Output (622.08 MHz/ 155.52 MHz/ 51.84 MHz) 622.08 MHz STS-12/STM-4 / 155.52 MHz STS-3/STM-1 / 51.84 MHz STS-1/STM-0 differential clock output for the corre- sponding recovered data output RXDO[0:3]P/N. The recovered serial data output port will be updated on the falling edge of this clock. User selectable LVDS standard or Differential LVPECL standard output based on OUTCFG pin state. LOL0 LOL1 LOL2 LOL3 LVCMOS O 98 99 63 64 CDR LOL Detect Output This pin is used to monitor the lock condition of the PLL in the clock and data recovery unit of each channel. "Low" = CDR Locked "High" = CDR Out of Lock CAP0P CAP0N Analog - 109 108 CDR Non-polarized External Loop Filter Capacitors Mode of Operation: 1. STS12/STM4: CAP[0:3]P/N = 0.47 µF ± 10% tolerance 2. STS3/STM1: CAP[0:3]P/N = 0.47 µF ± 10% tolerance 3. STS1/STM0: CAP[0:3]P/N = 1.0 µF ± 10% tolerance Use type X7R or X5R for improved stability over temperature. (Isolate from noise and place close to pin) CAP1P CAP1N Analog - 103 102 CAP2P CAP2N Analog - 59 60 CAP3P CAP3N Analog - 53 54 |
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