MC74VHC14 查看數據表（PDF） - Motorola => Freescale
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MC74VHC14 Datasheet PDF : 6 Pages
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MC74VHC14
A 50%
tPLH
Y 50% VCC
VCC
GND
tPHL
Figure 1. Switching Waveforms
4
3
2
1
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
* Includes all probe and jig capacitance
Figure 2. Test Circuit
(VT+)
(VT–)
VHtyp
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 Schmitt–Trigger Squares Up Inputs With Slow Rise and Fall Times
VCC
VH
Vin
VT+
VT–
GND
(b) A Schmitt–Trigger Offers Maximum Noise Immunity
VCC
VH
Vin
VT+
VT–
GND
VOH
VOH
Vout
Vout
VOL
VOL
Figure 4. Typical Schmitt–Trigger Applications
MOTOROLA
INPUT
Figure 5. Input Equivalent Circuit
4
VHC Data – Advanced CMOS Logic
DL203 — Rev 1
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