DS1218 Nonvolatile Controller

Description

The DS1218 Nonvolatile Controller Chip supplies circuitry required to render standard CMOS RAM nonvolatile. V_cc is monitored using a precise comparator that detects power-fail and inhibits chip-enable holding a write-protect status until power supplies return to nominal levels. The DS1218 switches active power supplies between V_cc and a battery source, whichever is greater. The switch has a voltage drop of less than 0.2V.

Key Features

Controller circuitry with monitoring and logic functions to make CMOS RAM nonvolatile
Monitors V_cc and write-protects when out of tolerance
Consumes less than 100nA battery current
Tests battery condition on power-up
Operating range: 0°C to +70°C
Voltage/tolerance: 5V ±10%
Underwriters Laboratories (UL®) Recognized

Key Specifications: Non-Volatile RAM Controllers

Part Number

CE Cntrl.

Smart Socket w/Int. Batt.

Li Batt. Monitor

Pwr. Fail Out

RAMs Controlled

Reset Out

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Price

max w/pins

See Notes

DS1218

Yes

PDIP(N)/8

SOIC(N)/8

$4.88 @1k

See All Non-Volatile RAM Controllers (13)

Diagram

Pin Assignment

Reliability Reports

Request Reliability Report for:

Underwriters Laboratories (UL®) Recognized

Software/Models

none

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-7 of 7

DS1218 Free
Sample Buy Status

Package: TYPE PINS FOOTPRINT

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?
Materials Analysis

DS1218+

Active PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8+1*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

DS1218

Active PDIP(N);8 pin;80 mm²
Outline Drawing: 21-0043 (PDF)
Land Pattern: Not Applicable
Use pkgcode/variation: P8-1*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1218S/T&R/

Active SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-2*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1218S

Active SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-2*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1218S/T&R

Active SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8-2*
0°C to +70°C RoHS/Lead-Free: No
Materials Analysis

DS1218S+

Active SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+2*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

DS1218S+T&R

Active SOIC(N);8 pin;31 mm²
Outline Drawing: 21-0041 (PDF)
Land Pattern: 90-0096 (PDF)
Use pkgcode/variation: S8+2*
0°C to +70°C RoHS/Lead-Free: Lead Free
Materials Analysis

More Information

UL Certified

Related Products

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See All Non-Volatile RAM Controllers (16 Products)

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1999-11-18
This page last modified: 2009-10-28