Other Parts Discussed in Thread: SN74AUP1G00
Hi,
I checked two datasheet of SN74AUP1Gxx series, one is input with Schmitt-Trigger SN74AUP1G97, another is input of CMOS mode SN74AUP1G00.
I copied the input voltage VIL & VIH spec below, and added a picture taken from one App Note. If Vcc is both powered by 3V, Would like to learn:
1. What are the differences between VT+ and VIH, and VT- and VIL?
2. Only Schmitt-Trigger type input has MIN & MAX value of VIH & VIL, but CMOS type input only has VIL_MAX and VIH_MIN, right?
If yes, what is the reason, why not VIL_MIN and VIH_MAX marked?
3. It seems that "hyst" voltage means "VT+ - VT-" in Schmitt-Trigger input, but what does "hyst" voltage mean in CMOS input?
4. If "hyst" voltage is defined for "VIH - VIL" or "VT+ - VT-", what definition can be used for "VIH_MAX - VIH_MIN", and "VIL_MAX - VIL-MIN"?
Below is a picture from one app note of TI.