19-2440; Rev 2; 10/02
Low-Power, SC70/SOT µP Reset Circuits with
Capacitor-Adjustable Reset Timeout Delay
General Description
Features
The MAX6340/MAX6421–MAX6426 low-power micro-
processor supervisor circuits monitor system voltages
from 1.6V to 5V. These devices perform a single function:
o Monitor System Voltages from 1.6V to 5V
o Capacitor-Adjustable Reset Timeout Period
o Low Quiescent Current (1.6µA typ)
o Three RESET Output Options
they assert a reset signal whenever the V
supply volt-
CC
age falls below its reset threshold. The reset output
remains asserted for the reset timeout period after V
CC
rises above the reset threshold. The reset timeout is exter-
nally set by a capacitor to provide more flexibility.
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
The MAX6421/MAX6424 have an active-low, push-
pull reset output. The MAX6422 has an active-high,
push-pull reset output and the MAX6340/MAX6423/
MAX6425/MAX6426 have an active-low, open-drain
reset output. The MAX6421/MAX6422/MAX6423 are
offered in 4-pin SC70 or SOT143 packages. The
MAX6340/MAX6424/MAX6425/MAX6426 are available
in 5-pin SOT23-5 packages.
o Guaranteed Reset Valid to V
= 1V
CC
o Immune to Short V
Transients
CC
o Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23
Packages
o MAX6340 Pin Compatible with LP3470
o MAX6424/MAX6425 Pin Compatible with
NCP300–NCP303, MC33464/MC33465,
S807/S808/S809, and RN5VD
Applications
o MAX6426 Pin Compatible with PST92XX
Portable Equipment
Battery-Powered Computers/Controllers
Automotive
Ordering Information
PART
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
5 SOT23-5
4 SC70-4
Medical Equipment
Intelligent Instruments
Embedded Controllers
Critical µP Monitoring
Set-Top Boxes
MAX6340UK_ _-T
MAX6421XS_ _-T
MAX6421US_ _-T
MAX6422XS_ _-T
MAX6422US_ _-T
MAX6423XS_ _-T
MAX6423US_ _-T
MAX6424UK_ _-T
MAX6425UK_ _-T
MAX6426UK_ _-T
4 SOT143-4
4 SC70-4
4 SOT143-4
4 SC70-4
Computers
4 SOT143-4
5 SOT23-5
5 SOT23-5
5 SOT23-5
Pin Configurations
Note: The MAX6340/MAX6421–MAX6426 are available with fac-
tory-trimmed reset thresholds from 1.575V to 5.0V in approxi-
mately 0.1V increments. Insert the desired nominal reset
threshold suffix (from Table 1) into the blanks. There are 50 stan-
dard versions with a required order increment of 2500 pieces.
Sample stock is generally held on standard versions only (see
Standard Versions Table). Required order increment is 10,000
pieces for nonstandard versions. Contact factory for availability.
All devices are available in tape-and-reel only.
TOP VIEW
V
CC
1
2
4
3
RESET
(RESET)
MAX6421X
MAX6422X
MAX6423X
SRT
GND
SC70
Typical Operating Circuit appears at end of data sheet.
Selector Guide appears at end of data sheet.
( ) ARE FOR THE MAX6422
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.
5秒后页面跳转
STM32H743技术深度剖析与应用案例探索
LM321中文资料解析：引脚功能介绍、技术特点、技术特性分析
74HC14芯片资料介绍：性能特性分析、引脚介绍
LM1875芯片手册：功放参数分析、引脚说明、电路设计要点
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
