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MAX6439, MAX6440, MAX6441, MAX6442

Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µP Reset

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX6439–MAX6442 are a family of ultra-low-power battery monitors with integrated microprocessor (µP) supervisors. The battery monitors are offered with single or dual low-battery output options that can be used to signal when the battery is OK (enabling full system operation), when the battery is low (for low-power system operation), and when the battery is dead (to disable system operation). These devices also have an independent µP supervisor that monitors V_CC and provides an active-low reset output. A manual reset function is available to reset the µP with a push-button. No external components are required.

The MAX6439–MAX6442 are offered with several factory-trimmed low-battery threshold combinations ideal for single-cell lithium-ion (Li+) or multicell alkaline/NiCd/NiMH applications. When the battery voltage drops below each specified low threshold, the low-battery outputs are asserted to alert the system. When the voltage rises above the specified high thresholds, the outputs are deasserted after a 150ms minimum timeout period, ensuring the voltages have stabilized before power circuitry is activated or providing microprocessor reset timing. The low and high thresholds provide hysteresis in battery-operated systems to eliminate output chattering.

The MAX6439/MAX6440 offer factory-trimmed battery monitors with a single output. The MAX6441/MAX6442 offer factory-trimmed battery monitors with dual outputs. All battery monitors have open-drain low-battery outputs.

The MAX6439–MAX6442 monitor system voltages (V_CC) from 1.8V to 3.3V with seven fixed reset threshold options. Each device is offered with two minimum reset timeout periods of 150ms or 1200ms. The MAX6439/MAX6441 are offered with an open-drain active-low RESET output and the MAX6440/MAX6442 are offered with a push-pull active-low RESET output.

The MAX6439–MAX6442 are offered in a SOT23 package and are fully specified over a -40°C to +85°C temperature range.

Data Sheet

Download	Rev 1	(PDF, 256kB)
E-Mail

Key Features

Factory-Trimmed V_BATT Threshold Options for Monitoring Single-Cell Li+ or Multicell Alkaline/NiCd/NiMH Applications
Immune to Short Battery Voltage Transients
Low Current (2.5µA typ at 3.6V)
Single and Dual Low-Battery Output Options
150ms Minimum Active-Low LBO Timeout Period
Independent µP Reset with Manual Reset
Factory-Set Reset Thresholds for Monitoring V_CC from 1.8V to 3.3V
Available with 150ms (min) and 1.2s (min) V_CC Reset Timeout Period Options
-40°C to +85°C Operating Temperature Range
Small 6- and 8-Pin SOT23 Packages
No External Components

Applications/Uses

Battery-Powered Systems (Single-Cell Li+ or Multicell NiMH, NiCd, Alkaline)
Cell Phones/Cordless Phones
Electronic Toys
MP3 Players
Pagers
PDAs
Portable Medical Devices

Key Specifications:

Supervisors (1 Monitored Voltage)

Part Number

Reset Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Supervisor Features

Reset Thresh. Accur.
(%)

I_CC
(µA)

Budgetary Price

min

@ +25°C

max

See Notes

MAX6439

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

Active Low

Open Drain

85ms to 300ms

>1s

No Watchdog

Manual Reset

Power Fail Comparator/Low Battery Detect

2.5

$1.36 @1k

MAX6440

Active Low

Push-Pull

$1.36 @1k

MAX6441

Active Low

Open Drain

$1.63 @1k

MAX6442

Active Low

Push-Pull

$1.63 @1k

See All Supervisors (1 Monitored Voltage) (274)

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

Microprocessor Supervisory (PDF)

Reliability Reports

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Software/Models

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Ordering Information

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Temperature:

Tape and Reel

Sample

Devices: 1-50 / 5376

<-- Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next -->

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6439UTAGRD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGRD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGRD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGRD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGSD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGSD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGSD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGSD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGTD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGTD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6439UTAGTD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGTD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGVD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGVD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGVD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGVD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGWD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGWD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGWD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGWD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6439UTAGYD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGYD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGYD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGYD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGZD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGZD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAGZD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAGZD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHRD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHRD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6439UTAHRD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHRD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHSD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHSD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHSD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHSD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHTD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHTD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHTD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHTD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6439UTAHVD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHVD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHVD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHVD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHWD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHWD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHWD7+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHWD7-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6439UTAHYD3+T			Active	SOT; Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6439UTAHYD3-T			Active	SOT;6 pin;9 mm² Land Pattern: Not Available Use pkgcode/variation: U6S-3*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis

Devices: 1-50 / 5376

<-- Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Next -->

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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Document Ref.: 19-2535 Rev 1; 2006-04-03
This page last modified: 2009-07-13

Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µP Reset

Status

Description

Data Sheet

Key Features

Applications/Uses

Key Specifications:

Diagram

Product Guides

Reliability Reports

Software/Models

Ordering Information

Similar Products by Function

Similar Products by Application

More Information

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Information Index

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