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MAX1259

Battery Manager

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1259 battery manager provides backup-battery switching for CMOS RAM, microprocessors, or other low-power logic ICs. It automatically switches to the backup battery when the primary power supply is interrupted. Low-loss switches guarantee an input-to-output differential of only 200mV while supplying 250mA from the primary power supply or 15mA from the battery.

Battery discharge during shipping does not occur in the MAX1259, since the backup battery can be disconnected by strobing the RST input.

A battery-fail output signal indicates when the backup battery is below +2V, and a power-fail output signal indicates when the primary power supply is low. The MAX1259 monitors the backup battery, warns of impending power failures, and switches the memory to the battery when failures occur. The MAX1259 is pin-compatible with the DS1259, but consumes three times less supply current. Commercial, extended, and military temperature range devices are available.

Data Sheet

Download	Rev 2	(PDF, 172kB)
E-Mail

Key Features

Switches to Backup Battery if Power Fails
Consumes Less than 100nA of Battery Current
Power-Fail Output Signals Primary Power-Supply Loss
Battery Monitor Indicates Low Battery
Battery Can Be Disconnected to Prevent Discharge During Shipping
Battery Automatically Reconnected when V_CC is Applied
Pin-Compatible with the DS1259
Supply Current Three Times Lower than DS1259
Available in Extended-Industrial and Military Temperature Ranges
Underwriters Laboratories (UL) Recognized

Applications/Uses

Automotive Systems
Battery Backup for CMOS RAM
Computers
Controllers
Uninterruptible Power Supplies

Key Specifications:

Battery Backup Circuits

Part Number

I_CC
(µA)

Industry Qualified

Oper. Temp.
(°C)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

max

max w/pins

See Notes

MAX1259

3330

Automotive - General

MIL-STD-883B

-55 to +125

-40 to +85

0 to +70

158.4

See All Battery Backup Circuits (86)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Application Circuit

Product Guides

Signal Chain (PDF)

Reliability Reports

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Underwriters Laboratories (UL) Recognized

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1259C/D			Active	DICE SALES;NA pin;DICE; Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
MAX1259CPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1259CPE+			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1259CWE			Active	SOIC(W);16 pin;110.6 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0107 (PDF) Use pkgcode/variation: W16-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
MAX1259CWE+			Active	SOIC(W);16 pin;110.6 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0107 (PDF) Use pkgcode/variation: W16+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1259CWE+T			Active	SOIC(W);16 pin;110.6 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0107 (PDF) Use pkgcode/variation: W16+2*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1259CWE-T			Active	W.SO;16 pin Land Pattern: Not Available	0°C to +70°C	See data sheet
MAX1259EPE			Active	PDIP(N);16 pin;158.4 mm² Outline Drawing:21-0043 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: P16-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1259EWE			Active	SOIC(W);16 pin;110.6 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0107 (PDF) Use pkgcode/variation: W16-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1259EWE+			Active	SOIC(W);16 pin;110.6 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0107 (PDF) Use pkgcode/variation: W16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1259EWE+T			Active	SOIC(W);16 pin;110.6 mm² Outline Drawing:21-0042 (PDF) Land Pattern: 90-0107 (PDF) Use pkgcode/variation: W16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1259EWE-T			Active	W.SO;16 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1259MJE			Active	CDIP(N);16 pin;173.5 mm² Outline Drawing:21-0045 (PDF) Land Pattern: Not Applicable Use pkgcode/variation: J16-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX1259MLP/883B			Active	LCC;20 pin;82.6 mm² Outline Drawing:21-0658 (PDF) Land Pattern: 90-0177 (PDF) Use pkgcode/variation: L20-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-4638 Rev 2; 2006-12-05
This page last modified: 2009-11-10