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HD74LS248 데이터시트(PDF) 5 Page - Renesas Technology Corp

부품명 HD74LS248
상세설명  BCD-to-Seven-Segment Decoder / Driver (internal pull-up outputs)
PDF  7 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD74LS248 데이터시트(HTML) 5 Page - Renesas Technology Corp

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HD74LS248
Rev.3.00, Jul.15.2005, page 5 of 6
Testing Method
Test Circuit
4.5V
a
b
c
d
e
f
g
A
B
C
D
Input
P.G.
Zout = 50
Ω
Output
VCC
RBI
LT
BI/RBO
RL
CL
Note:
CL includes probe and jig capacitance.
Testing Table
Inputs
Outputs
Item
RBI
D
C
B
A
a
b
c
d
e
f
g
4.5V
GND
GND
GND
IN
OUT
—
—
OUT
OUT
OUT
—
4.5V
GND
GND
4.5V
IN
—
—
OUT
—
OUT
—
—
4.5V
GND
4.5V
4.5V
IN
—
OUT
—
OUT
OUT
OUT
OUT
ton
toff
IN
GND
GND
GND
GND
OUT
OUT
OUT
OUT
OUT
OUT
—
Waveform
tPLH
tPHL
VOH
VOL
0 V
3 V
VOH
VOL
tPHL
tPLH
10%
90%
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
10%
90%
Input
In phase output
Out of phase output
tTLH
tTHL
Note:
Input pulse; tTLH
≤ 15 ns, t
THL
≤ 6 ns, PRR = 1 MHz, duty cycle = 50%



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