Datasheet > MAX6442KALQSD3+T

MAX6442KALQSD3+T

更新时间： 2024-11-28 04:31:23

品牌	Logo	应用领域
美信 - MAXIM		信息通信管理光电二极管
页数	文件大小	规格书
14页	250K
描述
Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN

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MAX6442KALQSD3+T 数据手册

19-2535; Rev 1; 12/05

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

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

(V ) from 1.8V to 3.3V with seven fixed reset threshold

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

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.

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.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

Applications

Pin Configurations

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MAX6442KALQSD3+T相关器件

型号	品牌	获取价格	描述	数据表
MAX6442KALQSD3-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN
MAX6442KALQSD7+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN
MAX6442KALQSD7-T	MAXIM	获取价格	Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset
MAX6442KALQTD3+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN
MAX6442KALQTD3-T	MAXIM	获取价格	Low-Power Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µ.P Reset
MAX6442KALQTD7+	MAXIM	获取价格	Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µP
MAX6442KALQTD7+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN
MAX6442KALQTD7-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN
MAX6442KALQVD3+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN
MAX6442KALQVD7+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 2 Channel, BICMOS, PDSO8, SOT-23, 8 PIN

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