HD74LS48 查看數據表（PDF） - Renesas Electronics
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HD74LS48 Datasheet PDF : 7 Pages
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HD74LS48
Testing Method
Test Circuit
4.5V
Input
P.G.
Zout = 50Ω
VCC
a
A
B
b
C
c
D
d
e
LT
f
RBI
BI/RBO g
RL
Output
CL
Waveform
tTLH
tTHL
90%
90%
3V
Input
1.3 V
1.3 V
10%
10%
0V
tPLH
tPHL
In phase output
1.3 V
tPHL
1.3 V
tPLH
VOH
VOL
Out of phase output
1.3 V
1.3 V
VOH
VOL
Testing Table
Item
tPLH
tPHL
RBI
4.5 V
4.5 V
4.5 V
IN
D
GND
GND
GND
GND
Inputs
C
GND
GND
4.5 V
GND
B
GND
4.5 V
4.5 V
GND
A
IN
IN
IN
GND
a
OUT
—
OUT
OUT
b
—
—
OUT
OUT
c
—
OUT
—
OUT
Outputs
d
OUT
—
OUT
OUT
e
OUT
OUT
OUT
OUT
f
OUT
—
OUT
OUT
g
—
—
OUT
—
Rev.3.00, Jul.22.2005, page 5 of 6
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