HD74LVC2244A
Test Circuit
VCC
Input
Pulse generator
Zout = 50 Ω
VCC
1G, 2G
Output
1Y1 to 2Y4
1A1 to 2A4
C L=
30 pF
(VCC = 1.8±0.15 V, VCC = 2.5±0.2 V)
R1 S1
R2
50 Ω Scope
OPEN
2×VCC
GND
VCC (V)
1.8±0.15
2.5±0.2
R1
1 kΩ
500 Ω
R2
950 Ω
450 Ω
Symbol
tPLH / t PHL
tZH / t HZ
tZL / tLZ
S1
OPEN
GND
2×VCC
Note: 1. CL includes probe and jig capacitance.
VCC
Input
Pulse generator
Zout = 50 Ω
VCC
1G, 2G
Output
1Y1 to 2Y4
1A1 to 2A4
C L=
50 pF
(VCC = 2.7 V, VCC = 3.3±0.3 V, VCC = 5.0±0.5 V)
500 Ω S1
450 Ω
50 Ω Scope
OPEN
*1 See
under table
GND
Symbol
tPLH / t PHL
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
Note: 1. CL includes probe and jig capacitance.
Rev.3.00 Aug. 20, 2004 page 6 of 9