
DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
2 of 16
PIN DESCRIPTION
PIN
NAME
FUNCTION
PDIP
PowerCap
1, 30
1, 33, 34
N.C.
No Connection
2
3
A16
Address Input
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
Data Input/Output
14
15
DQ1
15
14
DQ2
17
13
DQ3
18
12
DQ4
19
11
DQ5
20
10
DQ6
21
9
DQ7
16
17
GND
Ground
22
8
CE
Active-Low Chip Enable Input
24
7
OE
Active-Low Output Enable Input
29
6
WE
Active-Low Write-Enable Input
32
5
VCC
Power-Supply Input
—
4
RST
Active-Low Power-Fail Output, Open Drain. Requires a pullup resistor for
proper operation.
—
X1, X2,
VBAT
Crystal Connection, VBAT Battery Connection. UL recognized to ensure
against reverse charging when used with a lithium battery