參數(shù)資料
型號: HEF4543B
廠商: NXP Semiconductors N.V.
英文描述: BCD to 7-segment latch/decoder/driver(BCD-7段鎖存器/譯碼器/驅(qū)動器)
中文描述: BCD碼至7段鎖存器/解碼器/驅(qū)動器(的BCD - 7段鎖存器/譯碼器/驅(qū)動器)
文件頁數(shù): 4/8頁
文件大?。?/td> 85K
代理商: HEF4543B
January 1995
4
Philips Semiconductors
Product specification
BCD to 7-segment latch/decoder/driver
HEF4543B
MSI
FUNCTION TABLE
Notes
1.
2.
3.
4.
H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
For liquid crystal displays, apply a square-wave to PH.
For common cathode LED displays, select PH = LOW.
For common anode LED displays, select PH = HIGH.
Depends upon the BCD-code previously applied when LD = HIGH.
5.
INPUTS
OUTPUTS
LD
BI
PH
(4)
D
D
X
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
X
D
C
X
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
X
as above
D
B
X
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
X
D
A
X
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
X
O
a
L
H
L
H
H
L
H
H
H
H
H
L
L
L
L
L
L
O
b
L
H
H
H
H
H
L
L
H
H
H
L
L
L
L
L
L
O
c
L
H
H
L
H
H
H
H
H
H
H
L
L
L
L
L
L
O
d
L
H
L
H
H
L
H
H
L
H
H
L
L
L
L
L
L
(5)
O
e
L
H
L
H
L
L
L
H
L
H
L
L
L
L
L
L
L
O
f
L
H
L
L
L
H
H
H
L
H
H
L
L
L
L
L
L
O
g
L
L
L
H
H
H
H
H
L
H
H
L
L
L
L
L
L
DISPLAY
X
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
as above
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
blank
0
1
2
3
4
5
6
7
8
9
blank
blank
blank
blank
blank
blank
(5)
inverse of above
as above
Fig.5 Display.
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