74HC14 Datasheet, PDF (6/9 Pages) NXP Semiconductors – Hex inverting Schmitt trigger

74HC14
4
3
(V_T+)
V_Htyp
2
(V_T−)
1
2
3
4
5
6
V_CC, POWER SUPPLY VOLTAGE (VOLTS)
V_Htyp = (V_T+ typ) − (V_T− typ)
Figure 3. Typical Input Threshold, V_T+, V_T− versus Power Supply Voltage
A
(a) A Schmitt−Trigger Squares Up Inputs With Slow Rise and Fall Times
V_CC
V_H
V_in
V_T+
V_T−
GND
V_OH
V_out
V_OL
Y
(b) A Schmitt−Trigger Offers Maximum Noise Immunity
V_CC
V_H
V_in
V_T+
V_T−
GND
V_OH
V_out
V_OL
Figure 4. Typical Schmitt−Trigger Applications
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