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SP506 Datasheet(PDF) 13 Page - Exar Corporation |
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SP506 Datasheet(HTML) 13 Page - Exar Corporation |
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13 / 21 page  13 SP506_100_081208 SP506 Multi–Mode Serial Transceiver © Copyright 2008 Exar Corporation Figure 34. Driver Timing Test Load Circuit Figure 35. Receiver Timing Test Load Circuit 500 Ω CL Output Under Test S1 S2 VCC 1K Ω 1K Ω CRL Receiver Output S1 S2 Test Point VCC Figure 36. Driver Propagation Delays Figure 37. Driver Enable and Disable Times Figure 38. Receiver Propagation Delays +3V 0V 5V VOL A, B 0V 1.5V 1.5V tZL tZH VOH A, B 2.3V 2.3V tLZ tHZ 0.5V 0.5V Output normally LOW Output normally HIGH DECx or Tx_Enable VOH VOL RECEIVER OUT (VOH - VOL)/2 (VOH - VOL)/2 tPLH f > 10MHz; tR < 10ns; tF < 10ns OUTPUT V0D2+ V0D2 – A – B 0V 0V tPHL INPUT t SKEW = │tPHL - tPLH │ +3V +3V 0V 0V A B DRIVER DRIVER OUTPUT OUTPUT VO+ DIFFERENTIAL DIFFERENTIAL OUTPUT OUTPUT VA –V –V B 0V 0V VO– 1.5V 1.5V 1.5V 1.5V tPLH PLH tR tF f ≥ 10MHz; t R ≤ 10 ns; tF ≤ 10ns VO 1/2V 1/2VO 1/2V 1/2VO tPHL PHL tDPLH DPLH tDPHL DPHL tSKEW = SKEW = | tDPLH - DPLH - tDPHL DPHL | DRIVER DRIVER INPUT INPUT |
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