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
DS1218
DS1218
Maxim Integrated Products
Memory Controllers Nonvolatile Controller
Data Sheet
0-34469: $4.23
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
DS1218S
DS1218S
Maxim Integrated Products
Memory Controllers
Data Sheet
Negotiable 
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