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| 型号： | MAX822LUS+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/7页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR VOLT MPU SOT143-4 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 4.63V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-253-4，TO-253AA |
| 供应商设备封装： | SOT-143-4 |
| 包装： | 标准包装 |
| 其它名称： | MAX822LUS+TDKR |
19-1122; Rev 3; 12/05
4-Pin μP Voltage Monitors with Pin-Selectable
Power-On Reset Timeout Delay
General Description
The MAX821/MAX822 microprocessor (μP) supervisory
circuits monitor power supplies in μP and digital sys-
tems. They provide excellent circuit reliability and low
cost by eliminating external components and adjust-
ments when used with 5V-powered or 3V-powered cir-
cuits. The MAX821/MAX822 also provide a power-on
reset timeout delay that is pin selectable to 1ms (max),
20ms (min), or 100ms (min).
These devices perform a single function: they assert a
reset signal whenever the V CC supply voltage falls
below a preset threshold, and they keep reset asserted
for the pin-selected reset timeout delay after V CC has
risen above the reset threshold. The only difference
between the two devices is that the MAX821 has an
active-low RESET output (which is guaranteed to be in
the correct state for V CC down to 1V), while the
Features
? Pin-Selectable, Precision Power-On Reset Delay:
1ms (max), 20ms (min), or 100ms (min)
? Precision Monitoring of +3V to +5V Power-Supply
Voltages
? 2.5μA Supply Current
? Guaranteed Over Temperature (-40°C to +125°C)
? Guaranteed RESET Valid to V CC = 1V (MAX821)
? Power-Supply Transient Immunity
? No External Components
? SOT143 Package
Ordering Information
MAX822 has an active-high RESET output. The reset
comparator is designed to ignore fast transients on
PART
MAX821 LUS-T
NOMINAL V TH (V)
4.63
TOP MARK*
AZ_ _
V CC . Reset thresholds suitable for operation with a vari-
ety of supply voltages are available.
MAX821MUS-T 4.38
MAX821PUS-T 4.00
BA_ _
BM_ _
Low supply current makes the MAX821/MAX822 ideal
for use in portable equipment. These devices come in a
4-pin SOT143 package.
________________________Applications
Bar-Code Scanners
Computers
Controllers
Intelligent Instruments
MAX821TUS-T
MAX821SUS-T
MAX821UUS-T
MAX821RUS-T
MAX822 LUS-T
MAX822MUS-T
MAX822TUS-T
MAX822SUS-T
MAX822RUS-T
3.08
2.93
2.78
2.63
4.63
4.38
3.08
2.93
2.63
BB_ _
BC_ _
BL_ _
BD_ _
BF_ _
BG_ _
BH_ _
BJ_ _
BK_ _
Critical μP and μC Power Monitoring
Portable/Battery-Powered Equipment
__________Typical Operating Circuit
* The first two letters in the package top mark identify the part,
while the remaining two letters are the lot-tracking code.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Pin Configuration
V CC
V CC
TOP VIEW
MAX821
μ P
GND
1
4
V CC
MAX822
MAX821
20ms
100ms
SRT
RESET
(RESET)
RESET
INPUT
MAX822
1ms
(RESET) RESET
2
3
SRT
GND
GND
( ) ARE FOR MAX822
( ) ARE FOR MAX822
SOT143
________________________________________________________________ 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.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX822MUS | 制造商:Maxim Integrated Products 功能描述:4-PIN UP VOLTAGE MONITORS WITH PIN- - Rail/Tube |
| MAX822MUS+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.38V 7UA 4PIN SOT-143 - Rail/Tube |
| MAX822MUS+T | 功能描述:监控电路 4-Pin uPower Voltage Monitor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX822MUS-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX822PUS-T | 制造商:Maxim Integrated Products 功能描述:4-PIN UP VOLTAGE MONITORS WITH PIN-SELECTABLE - Tape and Reel |
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