HD74LVC16245A
Test Circuit
V
CC
V
CC
G
Output
A1
S1
500
Ω
S2
B1
C
L
=
50 pF
450
Ω
50
Ω
Scope
OPEN
*1 See under table
Input
Pulse generator
Z
out
= 50
Ω
See Function Table
GND
DIR
Symbol
t
PLH
/ t
PHL
t
ZH
/ t
HZ
t
ZL
/ t
LZ
S2
Vcc=2.7V,
3.3±0.3V
Vcc=5.0±0.5V
OPEN
GND
6V
OPEN
GND
2×Vcc
Notes:
1. C
L
includes probe and jig capacitance.
2. A2-B2 to A8-B8 are identical to above load circuit.
3. S1 : Input-Output change switch.
Waveforms – 1
t
r
90 %
Input
V
ref
10 %
t
PLH
V
ref
90 %
V
ref
10 %
t
PHL
V
OH
Output
V
ref
V
OL
t
f
V
IH
GND
Notes:
1. t
r
= 2.5 ns, t
f
= 2.5 ns
2. Input waveform : PRR = 10 MHz, duty cycle 50%
Rev.4.00 Jul. 29, 2004 page 5 of 7