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LTC488CSW データシート(PDF) 6 Page - Linear Technology |
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LTC488CSW データシート(HTML) 6 Page - Linear Technology |
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6 / 12 page  LTC488/LTC489 6 4889fb TEST CIRCUITS SWITCHING TIME WAVEFORMS Figure 1. Receiver Timing Test Circuit Note: The input pulse is supplied by a generator having the following characteristics: f = 1MHz, Duty Cycle = 50%, tr < 10ns, tf ≤ 10ns, ZOUT = 50Ω Figure 2. Receiver Enable and Disable Timing Test Circuit D 4889 F01 DRIVER RECEIVER CL RO A B 54Ω 100pF 100pF 1k 4889 F02 CL S1 S2 1k VCC RECEIVER OUTPUT 0V –VOD2 tPHL f = 1MHz; tr ≤ 10ns; tf ≤ 10ns 0V tPLH VOD2 INPUT A, B VOH 1.5V 1.5V VOL RO INPUT 4889 F03 f = 1MHz; tr ≤ 10ns; tf ≤ 10ns 1.5V RO 4889 F04 0V 3V 1.5V tZL VOL VOH 1.5V tLZ 0.5V 0.5V tHZ OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH 0V 5V 1.5V tZH RO EN OR EN12 Figure 3. Receiver Propagation Delays Figure 4. Receiver Enable and Disable Times |
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