HD74LVC16373A
Test Circuit
VCC
VCC
Note:
Input
Pulse Generator
1G, 2G
1Q1 to 2Q8
Output
CL =
50 pF
500 Ω S1
450 Ω
50 Ω Scope
OPEN
*1 See under table
GND
Zout = 50 Ω
Input
1D1 to 2D8
Pulse Generator
Zout = 50 Ω
1LE, 2LE
Symbol
tPLH / t PHL
tsu / t h / t w
tZH/ t HZ
tZL / t LZ
S1
Vcc=2.7V,
3.3±0.3V
Vcc=5.0±0.5V
OPEN OPEN
GND
6V
GND
2×Vcc
1. CL includes probe and jig capacitance.
Waveforms – 1
Input LE
Input D
Output Q
tr
tf
10 %
tr
90 % 90 %
Vref
10 %
tf
90 %
90 %
10 %
tPLH
10 %
Vref
Vref
tPHL
Vref
VIH
GND
VIH
GND
VOH
VOL
Rev.4.00 Jul. 29, 2004 page 6 of 9