MAX6440UTLQRD7-T

更新时间： 2024-11-30 23:50:23

品牌	Logo	应用领域
美信 - MAXIM		电池监控
页数	文件大小	规格书
14页	234K
描述
Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset

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MAX6440UTLQRD7-T 数据手册

19-2535; Rev 0; 7/02

Low-Power, Single-/Dual-Level Battery Monitors

with Hysteresis and Integrated µP Reset

General Description

Features

The MAX6439–MAX6442 are a family of ultra-low-power

battery monitors with integrated microprocessor (µP)

supervisors. The battery monitors are offered with sin-

gle 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 sys-

tem operation), and when the battery is dead (to dis-

able system operation). These devices also have an

ꢀ Factory-Trimmed V

Threshold Options for

BATT

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 LBO Timeout Period

ꢀ Independent µP Reset with Manual Reset

independent µP supervisor that monitors V

and pro-

vides an active-low reset output. A manual reset func-

tion is available to reset the µP with a push-button. No

external components are required.

ꢀ Factory-Set Reset Thresholds for Monitoring V

The MAX6439–MAX6442 are offered with several facto-

ry-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 out-

puts 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 cir-

cuitry is activated or providing microprocessor reset tim-

ing. The low and high thresholds provide hysteresis in

battery-operated systems to eliminate output chattering.

from 1.8V to 3.3V

ꢀ Available with 150ms (min) and 1.2s (min) V

Reset Timeout Period Options

ꢀ -40°C to +85°C Operating Temperature Range

ꢀ Small 6- and 8-Pin SOT23 Packages

ꢀ No External Components

Ordering Information

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

6 SOT23-6

8 SOT23-8

MAX6439UT_ _ _D_-T

MAX6440UT_ _ _D_-T

MAX6441KA_ _ _D_-T

MAX6442KA_ _ _D_-T

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 ) 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 RESET output

and the MAX6440/MAX6442 are offered with a push-

pull RESET output.

Note: The first two “_ _” are placeholders for the battery moni-

tor voltage levels. Desired threshold levels are set by the part

number suffix found in Tables 1 and 2. The third “_” is the V

reset threshold level suffix found in Table 3. The “_” after the D

is a placeholder for the reset timeout period suffix found in

Table 4. All devices are available in tape-and-reel only. There

is a 2500-piece minimum order increment for standard ver-

sions. Sample stock is typically held on standard versions only.

Nonstandard versions require a minimum order increment of

10,000 pieces. Contact factory for availability.

The MAX6439–MAX6442 are offered in a SOT23 pack-

age and are fully specified over a -40°C to +85°C temp-

erature range.

Pin Configurations

Applications

Battery-Powered Systems (Single-Cell Li+ or

Two-/Three-Cell NiMH, NiCd, Alkaline)

TOP VIEW

BATT

Cell Phones/Cordless Phones

Portable Medical Devices

Electronic Toys

Pagers

MAX6439

MAX6440

GND

LBO

RESET

PDAs

SOT23-6

MP3 Players

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...14

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与MAX6440UTLQRD7-T相关器件

型号	品牌	获取价格	描述	数据表
MAX6440UTLQSD3+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN
MAX6440UTLQSD3-T	MAXIM	获取价格	Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset
MAX6440UTLQSD7+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN
MAX6440UTLQSD7-T	MAXIM	获取价格	Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset
MAX6440UTLQTD3-T	MAXIM	获取价格	Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset
MAX6440UTLQTD7+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN
MAX6440UTLQTD7-T	MAXIM	获取价格	Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset
MAX6440UTLQVD3+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN
MAX6440UTLQVD3-T	MAXIM	获取价格	Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset
MAX6440UTLQVD7+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO6, SOT-23, 6 PIN

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