Description
19-5203; Rev 4/10 DS1644/DS1644P Nonvolatile Timekeeping RAM www.maxim-ic.com .
PIN PDIP PowerCap
NAME
1 32
A14
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
11 16
DQ0
12 15
DQ.
Features
* Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source
* Clock Registers are Accessed Identically to the Static RAM. These Registers are Resident in the Eight Top RAM Locations.
* Totally Nonvolatile with Over 10 Years of Operation in the Abs
