HD74LVC245A
Switching Characteristics
Item
VCC (V)
Symbol
Ta = –40 to 85°C
Min
Typ
Propagation delay time tPLH
2.7
—
—
tPHL
3.3±0.3 1.5
—
5.0±0.5 —
—
Output enable time
tZH
2.7
—
—
tZL
3.3±0.3 1.5
—
5.0±0.5 —
—
Output disable time
tZH
2.7
—
—
tLZ
3.3±0.3 1.5
—
5.0±0.5 —
—
Between output pins skew tOSLH
2.7
—
—
*1
tOSHL
3.3±0.3 —
—
5.0±0.5 —
—
Input capacitance
Output capacitance
CIN
2.7
CO
2.7
—
3.0
—
15.0
Note: 1. This parameter is characterized but not tested.
tosLH = | tPLHm - tPLHn|, tosHL = | tPHLm - tPHLn|
Max
8.0
7.0
5.5
9.5
8.5
7.0
8.5
7.5
6.5
—
1.0
1.0
—
—
Unit
ns
ns
ns
ns
pF
pF
Test Circuit
VCC
VCC
From
(Input)
A or B
To
(Output)
B or A
OE
A or B
OE
A or B
OE
Input
Pulse
Generator
Zout = 50 Ω
T/R
S1
A0
B0
Output
500 Ω S2
CL =
450 Ω
50 pF 50 Ω Scope
OPEN
*1 See
under table
GND
Note: 1. CL includes probe and jig capacitance.
Symbol
tPLH / t PHL
tZH/ t HZ
tZL / t LZ
S2
Vcc=2.7V,
3.3±0.3V
Vcc=5.0±0.5V
OPEN OPEN
GND
GND
6V
2×Vcc
Rev.4.00 Jul. 27, 2004 page 4 of 6