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HD74LS247 데이터 시트보기 (PDF) - Renesas Electronics
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HD74LS247
BCD-to-Seven-Segment Decoder / Driver (with three-state outputs)
Renesas Electronics
HD74LS247 Datasheet PDF : 8 Pages
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HD74LS247
Testing Method
Test Circuit
4.5V
P.G.
Z
out
= 50
Ω
Input
V
CC
a
A
b
B
c
C
D
d
LT
e
RBI
f
BI/RBO g
R
L
Output
C
L
Note: C
L
includes probe and jig capacitance.
Testing Table
Item
t
on
t
off
RBI
4.5V
4.5V
4.5V
IN
D
GND
GND
GND
GND
Inputs
C
GND
GND
4.5V
GND
B
GND
4.5V
4.5V
GND
A
IN
IN
IN
GND
a
OUT
—
—
OUT
b
—
—
OUT
OUT
c
—
OUT
—
OUT
Outputs
d
OUT
—
OUT
OUT
e
OUT
OUT
OUT
OUT
f
OUT
—
OUT
OUT
g
—
—
OUT
—
Waveform
t
TLH
t
THL
90%
90%
3V
Input
1.3 V
1.3 V
10%
10%
0V
t
off
t
on
In phase output
1.3 V
t
on
1.3 V
t
off
V
OH
V
OL
Out of phase output
1.3 V
V
OH
1.3 V
V
OL
Note: Input pulse; t
TLH
≤
15 ns, t
THL
≤
6 ns, PRR = 1 MHz, duty cycle = 50%
Rev.3.00, Jul.15.2005, page 5 of 7
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