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Hello. Welcome to Futurlec. The ELECTRONIC COMPONENTS Superstore. To find the component your looking for, either search by Part Number or visit the relative department. Need Help.




DS1221 - Nonvolatile Controller X 4 Chip Datasheet


Photograph
DS1221 Dallas Semiconductor IC
Features
Control Circuitry to Make CMOS RAM Nonvolatile
Controls up to 4 memories
Monitors Vcc and write-protects when out of tolerance
Consumes less than 100nA battery current
Tests battery condition on power-up
Supports redundant batteries

Pin Description
Pin Number Description
1 Vcco - RAM Supply
2 Vbat1 - + Battery 1
3 RST - Reset
4 A - Address Input A
5 B - Address Input A
6 RD - Read Input
7 WE - Write Enable
8 GND - Ground
9 D/Q - Data Input/Output
10 CE3 - Chip Enable Output 3
11 CE2 - Chip Enable Output 2
12 CE1 - Chip Enable Output 1
13 CE0 - Chip Enable Output 0
14 CE - Chip Enable Input
15 Vbat2 - + Battery 2
16 Vcci - +5V Supply
Dimensional Drawing
Dallas Semiconductor DS1221 IC

Dimensional Drawing
DIP 16 Dimension Drawing

DIP 16 Dimension Drawing


Technical Data
Data Sheet

Dallas Semiconductor - Data Sheet for DS1221

Application Notes
 




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