參數(shù)資料
型號(hào): UPD4991ACX
廠商: NEC Corp.
英文描述: 4-BIT PARALLEL I/O CALENDAR CLOCK
中文描述: 4位并行I / O日歷鐘
文件頁(yè)數(shù): 27/32頁(yè)
文件大?。?/td> 133K
代理商: UPD4991ACX
μ
PD4991A
27
Example of an Application Circuit
The application circuits and their parameters are for references only and are not intended for use in actual
design-in’s.
D
3
D
2
D
1
D
0
D
A
3
A
2
A
1
A
0
A
A
3
A
2
A
1
A
0
ADDRESS
DECODER
WE
WR
OE
RD
V
DD
C
1SS53
Ni-Cd
3.6 V
+5 V
V
SS
GND
15 k
4.7 k
1 k
510
2SA1175
2SC2785
1SS53
PD4991A
D
0
D
1
D
2
D
3
CS
2
X
IN
X
OUT
TP
1
TP
2
POWER
FAIL
C
G
= 20 ~ 30 pF
C
D
= 20 pF
32.768
kHz
10 k
+5 V
C: ceramic capacitor or tantalum capacitor
(0.1 F to 10 F)
10 k
+5 V
CS
1
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