电子工程世界电子工程世界电子工程世界

关键词

搜索

型号

搜索

MAX6440UTMQTD7+

产品描述Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µP Reset
产品类别电源/电源管理    电源电路   
文件大小243KB,共14页
制造商Maxim(美信半导体)
官网地址https://www.maximintegrated.com/en.html
标准  
下载文档 详细参数 全文预览

MAX6440UTMQTD7+概述

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

MAX6440UTMQTD7+规格参数

参数名称属性值
是否无铅不含铅
是否Rohs认证符合
厂商名称Maxim(美信半导体)
包装说明SOT-23, 6 PIN
Reach Compliance Codecompli
ECCN代码EAR99
Factory Lead Time12 weeks
模拟集成电路 - 其他类型POWER SUPPLY SUPPORT CIRCUIT
峰值回流温度(摄氏度)NOT SPECIFIED
处于峰值回流温度下的最长时间NOT SPECIFIED

文档预览

下载PDF文档
19-2535; Rev 1; 12/05
Low-Power, Single-/Dual-Level Battery Monitors
with Hysteresis and Integrated µP Reset
General Description
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
independent µP supervisor that monitors V
CC
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.
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.
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
RESET
output
and the MAX6440/MAX6442 are offered with a push-
pull
RESET
output.
The MAX6439–MAX6442 are offered in a SOT23 pack-
age and are fully specified over a -40°C to +85°C temp-
erature range.
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
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
MAX6439–MAX6442
Ordering Information
PART
MAX6439UT_
_ _D_-T
MAX6440UT_
_ _D_-T
MAX6441KA_
_ _D_-T
MAX6442KA_
_ _D_-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
6 SOT23-6
8 SOT23-8
8 SOT23-8
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
CC
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.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Applications
Battery-Powered Systems (Single-Cell Li+ or
Two-/Three-Cell NiMH, NiCd, Alkaline)
Cell Phones/Cordless Phones
Portable Medical Devices
Electronic Toys
Pagers
PDAs
MP3 Players
LBO
3
Pin Configurations
TOP VIEW
V
BATT
1
6
V
CC
MR
2
MAX6439
MAX6440
5
GND
4
RESET
SOT23-6
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
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.
请问有谁可以介绍一个可以生产支持3G,Wifi嵌入式系统的深圳厂家
公司要做广告机的系统,要支持3G(EVDO)和Wifi网络的,我原来只做应用系统,底层的都没做有,网上找了很久都没找到支持3G的,最多也只能支持wifi, 有没有哪位朋友介绍一个厂家可以生产同时支持3 ......
wanglong137136 嵌入式系统
LabVIEW实现IP的Ping功能
在DOS下通过ping命令来链接远程IP 并返回相应通讯成功信息在LabVIEW下实现的程序。, d$ S* p6 Z$ m* L; ? g# ` 改成vi即可使用...
心仪 测试/测量
用IAR 开发LPC1114,怎样把程序下载到开发板呢?
我用的LPCXpresso-cn 开发板,用IAR FOR ARM 开发程序,但不晓得怎样把程序下载到开发板,IAR要怎么设置呢?C:\Users\yang\Pictures...
小柏 NXP MCU
R21哪里买会比较便宜?
最近想再买一两块r21搭建组网玩一下,深入研究ZigBee,但哪个上面买比较便宜,求推荐:congratulate: ...
770781327 Microchip MCU
关于51外部中断响应的疑问?这不是一个简单的问题。
向大家请教一个问题,我使用INT0做外部中断输入,下降沿触发,发现中断信号来了以后到进入中断处理程序的 时间似乎比较长,我期望是在3us内,我使用22.1184M晶振。我在外部中断中嵌套使用了定 ......
liyang121316 51单片机
简单RISC处理器设计
学习了使用Verilog HDL语言设计简单组合逻辑和简单时序逻辑模块,学习了自顶向下的设计方法,同时还学习了状态机的设计。在这里,将综合运用以上所学的知识,设计一个简化的处理器 ......
至芯科技FPGA大牛 FPGA/CPLD

 
EEWorld订阅号

 
EEWorld服务号

 
汽车开发圈

 
机器人开发圈

About Us 关于我们 客户服务 联系方式 器件索引 网站地图 最新更新 手机版

站点相关: 大学堂 TI培训 Datasheet 电子工程 索引文件: 2051  2439  523  1718  1733  20  5  31  13  48 

器件索引   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

北京市海淀区中关村大街18号B座15层1530室 电话:(010)82350740 邮编:100190

电子工程世界版权所有 京B2-20211791 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号 Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved