DS1642 ram equivalent, nonvolatile timekeeping ram.
* Integrated NV SRAM, Real-Time Clock,
Crystal, Power-Fail Control Circuit, and
Lithium Energy Source
* Standard JEDEC Bytewide 2k x 8 Static
RAM Pinout
* Clo.
PIN NAME
FUNCTION
1 A7
2 A6
3 A5
4 A4
5 A3
6 A2 Address Input
7 A1
8 A0
19 A10
22 A9
23 A8
9 DQ0
10 DQ1
11 DQ2
13 14
DQ3 DQ4
Data Input/Output
15 DQ5
16 DQ6
17 DQ7
12 GND Ground 18 CE Active-Low Chip-Enable Input 20 OE Active-L.
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