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