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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 172kB) Download   E-Mail

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.

Key Features		Applications/Uses
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 VCC 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		Automotive Systems Battery Backup for CMOS RAM Computers Controllers Uninterruptible Power Supplies

Diagram

Typical Application Circuit

Design Guides

Low-Power Notebook ICs (PDF)

Reliability Reports

Show FIT data for: MAX1259 Request Reliability Report for: MAX1259 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: 1-14 of 14

MAX1259	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
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
MAX1259C/D			Active	DICE SALES;NA pin;0 mm² Land Pattern: Not Applicable Use pkgcode/variation: DICE*		See data sheet
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
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
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
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
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
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
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
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-T			Active	Land Pattern: Not Available	0°C to +70°C	See data sheet
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-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet

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