DS1746_10 Datasheet, PDF (2/16 Pages) Maxim Integrated Products – Y2K-Compliant, Nonvolatile Timekeeping RAMs

DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
PIN DESCRIPTION
PIN
PDIP PowerCap
NAME
1, 30 1, 33, 34
N.C.
2
3
A16
3
32
A14
4
30
A12
5
25
A7
6
24
A6
7
23
A5
8
22
A4
9
21
A3
10
20
A2
11
19
A1
12
18
A0
23
28
A10
25
29
A11
26
27
A9
27
26
A8
28
31
A13
31
2
A15
13
16
DQ0
14
15
DQ1
15
14
DQ2
17
13
DQ3
18
12
DQ4
19
11
DQ5
20
10
DQ6
21
9
DQ7
16
17
22
8
24
7
29
6
GND
CE
OE
WE
32
5
V_CC
—
4
RST
—
X1, X2,
V_BAT
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, V_BAT Battery Connection. UL recognized to ensure
against reverse charging when used with a lithium battery. www.maxim-
ic.com/qa/info/ul/
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