Datasheet

DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
2 of 20
PIN DESCRIPTION
PIN
EDIP PowerCap
NAME FUNCTION
1 2
RST
Active-Low Power-On Reset Output (Open Drain)
2 30 A12
3 25 A7
4 24 A6
5 23 A5
6 22 A4
7 21 A3
8 20 A2
9 19 A1
10 18 A0
21 28 A10
23 29 A11
24 27 A9
25 26 A8
Address Inputs
11 16 DQ0
12 15 DQ1
13 14 DQ2
15 13 DQ3
16 12 DQ4
17 11 DQ5
18 10 DQ6
19 9 DQ7
Data Input/Outputs
20 8
CE
Active-Low Chip Enable
22 7
OE
Active-Low Output Enable
26 1 IRQ/FT Active-Low Interrupt/Frequency Test Output (Open Drain)
27 6
WE
Active-Low Write Enable
28 5 V
CC
Power-Supply Input
17 GND Ground
— 2, 3, 31–34 N.C No Connection