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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 Start-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 B
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
Pin Layout
DS1210 - DS1210 Nonvolatile Controller Chip Pin Layout

Dimensional Drawing
DS1210 DIP8 Dimension Drawing
DS1210 DIP8 Dimension Drawing

Technical Data

Data Sheet

Maxim Integrated - Data Sheet for DS1221

Application Notes

   





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