74HC14A データシートの表示（PDF） - ON Semiconductor

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74HC14A

Hex Schmitt−Trigger Inverter

ON Semiconductor 

MC74HC14A

4

3

(VT+)

VHtyp

2

(VT−)

1

2

3

4

5

6

VCC, POWER SUPPLY VOLTAGE (VOLTS)

VHtyp = (VT+ typ) − (VT− typ)

Figure 3. Typical Input Threshold, VT+, VT− versus Power Supply Voltage

A

(a) A Schmitt−Trigger Squares Up Inputs With Slow Rise and Fall Times

VCC

VH

Vin

VT+

VT−

GND

VOH

Vout

VOL

Y

(b) A Schmitt−Trigger Offers Maximum Noise Immunity

VCC

VH

Vin

VT+

VT−

GND

VOH

Vout

VOL

Figure 4. Typical Schmitt−Trigger Applications

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6

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