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參數(shù)資料
| 型號： | MAX821 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 4-Pin レP Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay |
| 中文描述： | 4引腳、微處理器電壓監(jiān)測器，引腳可設(shè)置上電復位超時周期 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 77K |
| 代理商： | MAX821 |
General Desc ription
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
MAX822 has an active-high RESET output. The reset
comparator is designed to ignore fast transients on
V
CC
. Reset thresholds suitable for operation with a vari-
ety of supply voltages are available.
Low supply current makes the MAX821/MAX822 ideal
for use in portable equipment. These devices come in a
4-pin SOT143 package.
________________________Applic ations
Bar-Code Scanners
Computers
Controllers
Intelligent Instruments
Critical
μ
P and
μ
C Power Monitoring
Portable/Battery-Powered Equipment
__________Typic al Operating Circ uit
Features
o
Pin-Selectable, Precision Power-On Reset Delay:
1ms (max), 20ms (min), or 100ms (min)
o
Precision Monitoring of +3V to +5V Power-Supply
Voltages
o
2.5μA Supply Current
o
Guaranteed Over Temperature (-40°C to +125°C)
o
Guaranteed
RESET
Valid to V
CC
= 1V (MAX821)
o
Power-Supply Transient Immunity
o
No External Components
o
SOT143 Package
M
4-Pin μP Voltage Monitors with Pin-S elec table
Power-On Reset T imeout Delay
________________________________________________________________
Maxim Integrated Products
1
1
2
4
3
V
CC
SRT
(RESET) RESET
GND
MAX821
MAX822
SOT143
TOP VIEW
( ) ARE FOR MAX822
Pin Configuration
MAX821
MAX822
V
CC
RESET
(RESET)
RESET
INPUT
GND
V
CC
GND
μ
P
( ) ARE FOR MAX822
SRT
20ms
100ms
1ms
19-1122; Rev 1; 12/99
PART
MAX821
LUS-T
MAX821MUS-T
MAX821PUS-T
MAX821TUS-T
MAX821SUS-T
MAX821UUS-T
MAX821RUS-T
MAX822
LUS-T
MAX822MUS-T
MAX822TUS-T
MAX822SUS-T
MAX822RUS-T
4.38
4.00
3.08
2.93
2.78
2.63
4.63
4.38
3.08
2.93
2.63
4.63
NOMINAL V
TH
(V)
TOP MARK*
AZ_ _
BA_ _
BM_ _
BB_ _
BC_ _
BL_ _
BD_ _
BF_ _
BG_ _
BH_ _
BJ _ _
BK_ _
Ordering Information
* The first two letters in the package top mark identify the part,
while the remaining two letters are the lot-tracking code.
Note:
These parts are offered in the SOT143-4 package, in the
extended temperature range (-40°C to +85°C).
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX821_05 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:4-Pin ??P Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay |
| MAX8211 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Microprocessor Voltage Monitors with Programmable Voltage Detection |
| MAX8211_08 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Microprocessor Voltage Monitors with Programmable Voltage Detection |
| MAX8211C/D | 功能描述:監(jiān)控電路 Microprocessor Voltage Monitors with Programmable Voltage Detection RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX8211C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
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