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SP3508EB Datasheet(PDF) 21 Page - Exar Corporation |
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SP3508EB Datasheet(HTML) 21 Page - Exar Corporation |
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21 / 36 page  2 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP3508_00_072208 Figure 33. Driver Timing Test Load Circuit Figure 34. Receiver Timing Test Load Circuit Figure 35. Driver Propagation Delays Figure 36. Driver Enable and Disable Times Figure 37. Receiver Propagation Delays 500Ω C L Output Under Test S 1 S 2 VCC 1KΩ 1KΩ CRL R eceiver Output S 1 S 2 Test P oint VCC +3V 0V 5V V OL A, B 0V 1.5V 1.5V tZL tZH V OH A, B 2.3V 2.3V tLZ tHZ 0.5V 0.5V Output normally L OW Output normally H IG H Mx or Tx_Enable f = 1MHz; tR ≤ 10ns; tF ≤ 10ns V OH VOL R E C E IVE R OUT (V OH - V OL)/2 (V OH - VOL)/2 tPLH f > 10MHz; tR < 5ns; tF < 5ns OUTP UT V0D2 + V 0D2– A – B 0V 0V tPHL INP UT tSKEW = | tPHL - tPLH | +3V 0V DR IV E R INP UT A B DR IV E R OUTP UT V O+ DIFFE R E NTIAL OUTP UT V B – V A 0V VO– 1.5V 1.5V tPLH tR tF f > 10MHz; tR < 5ns; tF < 5ns V O 1/2V O 1/2V O tPHL tDPLH tDPHL tSKEW = | tDPLH - tDPHL | |
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