DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs

2 of 16

PIN DESCRIPTION

PIN

PDIP

PowerCap

NAME

FUNCTION

1, 30

1, 33, 34

N.C.

No Connection

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

Address Input

13

16

DQ0

14

15

DQ1

15

14

DQ2

17

13

DQ3

18

12

DQ4

19

11

DQ5

20

10

DQ6

21

9

DQ7

Data Input/Output

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

Power-Supply Input

—

4

RST

Active-Low Power-Fail Output, Open Drain. Requires a pullup resistor for

proper operation.

—

X1, X2,

against reverse charging when used with a lithium battery. www.maxim-

ic.com/qa/info/ul/