Input Timing Characteristics

Input Timing Characteristics

Non-isolated Input Performance (measured at Vcc = 5 V, Rext = 1 kΩ)

Parameter Symbol Non-isolated
Input Low Voltage VL 0.85 V
Input High Voltage VH 4.94 V
Input Threshold High Voltage VTHH 4.54 V
Input Threshold Low Voltage VTHL 1.26 V
Cycle Rise Time tR 10.8 μs
Cycle Fall Time tF 2 μs
Current   4.1 mA

Opto-isolated Input Performance (Vcc = varying pk-pk)

  Parameter   Symbol Opto-isolated
5 V, 1 kΩ
Opto-isolated
3 V, 200 Ω
Input Low Voltage VIL ≤ 1.96 V ≤ 2 V
Input High Voltage VIH ≥ 2 V ≥ 2.05 V
Propagation Delay Low to High tPDLH 20.9 μs 19.7 μs
Propagation Delay High to Low tPDHL 5.6 μs 16.7 μs
Typical Positive Pulse Width tMPPW 12 μs 12 μs
Typical Negative Pulse Width tMNPW 6 μs 6 μs