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MAX6441KABGZD7+

更新时间： 2024-10-28 13:10:55
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美信 - MAXIM 电源电路电池电源管理电路光电二极管监控信息通信管理
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14页 234K
描述
Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µP Reset

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MAX6441KABGZD7+ 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active包装说明：SOT-23, 8 PIN
Reach Compliance Code：compliantFactory Lead Time：12 weeks
风险等级：5.58Is Samacsys：N
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 SPECIFIEDBase Number Matches：1

MAX6441KABGZD7+ 数据手册

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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-  
CC  
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  
CC  
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  
CC  
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  
-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  
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  
CC  
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  
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.  
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  
V
1
2
3
6
5
4
V
CC  
BATT  
MR  
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  
1
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.  
1234567...14

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