DS1746070 查看數據表（PDF） - Maxim Integrated
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DS1746070 Datasheet PDF : 16 Pages
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DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
PIN DESCRIPTION
PDIP
1, 30
2
3
4
5
6
7
8
9
10
11
12
23
25
26
27
28
31
13
14
15
17
18
19
20
21
16
22
24
29
PIN
PowerCap
1, 33, 34
3
32
30
25
24
23
22
21
20
19
18
28
29
27
26
31
2
16
15
14
13
12
11
10
9
17
8
7
6
NAME
N.C.
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
A10
A11
A9
A8
A13
A15
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
GND
CE
OE
WE
32
5
VCC
—
4
RST
—
X1, X2,
VBAT
No Connection
FUNCTION
Address Input
Data Input/Output
Ground
Active-Low Chip Enable Input
Active-Low Output Enable Input
Active-Low Write-Enable Input
Power-Supply Input
Active-Low Power-Fail Output, Open Drain. Requires a pullup resistor for
proper operation.
Crystal Connection, VBAT Battery Connection. UL recognized to ensure
against reverse charging when used with a lithium battery
(www.maximintegrated.com/qa/info/ul/)
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