Product Summary

The ds1218 is a CMOS circuit which solves the application problems of converting CMOS RAM into nonvolatile memory. Incoming power of the ds1218 is monitored for an out-of-tolerance condition. By combining the ds1218 nonvolatile controller chip with a full CMOS memory and lithium batteries, 10 years of nonvolatile RAM operation can be achieved.

Parametrics

ds1218 absolute maximum ratings: (1) Voltage on Any Pin Relative to Ground: -0.5 to +7V; (2) Operating Temperature: 0 to 70°C; (3) Storage Temperature: -55 to +125°C; (4) Soldering Temperature: 260°C for 10 seconds.

Features

ds1218 features: (1) Converts CMOS RAM into nonvolatile memories; (2) Unconditionally write protects when Vcc is out of tolerance; (3) Automatically switches to battery when power fail occurs; (4) Space saving 8-pin mini-DIP/8-pin 150 mil SOIC; (5) Consumes less than 100 na of battery current.

Diagrams

DS1218 Pin Assignment

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
DS1218S/T&R
DS1218S/T&R
Maxim Integrated Products
Memory Controllers
Data Sheet
Negotiable 
DS1218S+
DS1218S+
Maxim Integrated Products
Memory Controllers Nonvolatile Controller
Data Sheet
0-1: $9.35
1-25: $6.28
25-50: $4.55
50-100: $4.49
DS1218S+T&R
DS1218S+T&R
Maxim Integrated Products
Memory Controllers Nonvolatile Controller
Data Sheet
0-2083: $3.81
2083-2500: $3.81
DS1218S
DS1218S
Maxim Integrated Products
Memory Controllers
Data Sheet
Negotiable 
DS1218+
DS1218+
Maxim Integrated Products
Memory Controllers Nonvolatile Controller
Data Sheet
0-1: $7.96
1-25: $5.57
25-50: $5.34
50-100: $3.71
DS1218
DS1218
Maxim Integrated Products
Memory Controllers Nonvolatile Controller
Data Sheet
0-34469: $4.23