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參數(shù)資料
| 型號(hào)： | MAX819M |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | +5V Microprocessor Supervisory Circuits |
| 中文描述： | +5V微處理器監(jiān)控電路 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 114K |
| 代理商： | MAX819M |
_______________General Desc ription
The MAX817/MAX818/MAX819 microprocessor (μP)
supervisory circuits simplify power-supply monitoring,
battery control, and chip-enable gating in μP systems
by reducing the number of components required.
These devices are designed for use in +5V-powered
systems. Low supply current (11μA typical) and small
package size make these devices ideal for portable
applications. The MAX817/MAX818/MAX819 are specif-
ically designed to ignore fast transients on V
CC
. Other
supervisory functions include active-low reset, backup-
battery switchover, watchdog input, battery freshness
seal, and chip-enable gating. The Selector Guide below
lists the specific functions available from each device.
These devices offer two pretrimmed reset threshold volt-
ages for ±5% or ±10% power supplies: 4.65V for the L
versions and 4.40V for the M versions. The MAX817/
MAX818/MAX819 are available in space-saving μMAX
packages, as well as 8-pin DIP/SO.
________________________Applic ations
Battery-Powered Computers and Controllers
Embedded Controllers
Intelligent Instruments
Critical μP Monitoring
Portable Equipment
____________________________Features
o
Precision Supply-Voltage Monitor:
4.65V (MAX81_L)
4.40V (MAX81_M)
o
11μA Quiescent Supply Current
o
200ms Reset Time Delay
o
Watchdog Timer with 1.6sec Timeout
(MAX817/MAX818)
o
Battery-Backup Power Switching; Battery Voltage
Can Exceed V
CC
o
Battery Freshness Seal
o
On-Board, 3ns Gating of Chip-Enable Signals
(MAX818)
o
Uncommitted Voltage Monitor for Power-Fail or
Low-Battery Warning (MAX817/MAX819)
o
Manual Reset Input (MAX819)
M
+5V Mic roproc essor S upervisory Circ uits
________________________________________________________________ Maxim Integrated Products
1
WDI
GND
PFO
PFI
1
2
8
7
BATT
RESET
V
CC
OUT
MAX817
DIP/SO/
μ
MAX
TOP VIEW
3
4
6
5
_________________Pin Configurations
19-0494; Rev 1; 3/96
PART
MAX817
_CPA
MAX817_CSA
MAX817_CUA
Ordering Information continued on last page.
These parts offer a choice of reset threshold voltage. From the
table below, select the suffix corresponding to the desired
threshold and insert it into the blank to complete the part number.
0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
8 Plastic DIP
8 SO
8 μMAX
______________Ordering Information
_____________________S elec tor Guide
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
SUFFIX
RESET THRESHOLD (V)
L
M
4.65
4.40
FEATURE
MAX817
L/M
Active-Low Reset
Backup-Battery Switchover
Power-Fail Comparator
Watchdog Input
Battery Freshness Seal
Manual Reset Input
Chip-Enable Gating
MAX818
L/M
MAX819
L/M
—
—
—
—
—
Pin-Package
8-DIP/SO/
μMAX
8-DIP/SO/
μMAX
—
8-DIP/SO/
μMAX
Low-Power, Pin-
Compatible Upgrades for:
MAX690A/
MAX692A
—
MAX703/
MAX704
Typical Operating Circuit appears at end of data sheet.
Pin Configurations continued at end of data sheet.
*Patents Pending
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX819MCPA | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX819MCPA+ | 功能描述:監(jiān)控電路 5V MPU Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX819MCSA | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX819MCSA+ | 功能描述:監(jiān)控電路 5V MPU Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX819MCSA+T | 功能描述:監(jiān)控電路 5V MPU Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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