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| 型号： | MAX818MESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU 5V 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 备用电池电路 |
| 监视电压数目： | 1 |
| 复位： | 低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.4V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
19-0486; Rev 3; 12/05
+5V Microprocessor Supervisory Circuits
General Description
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.
_____________________Selector Guide
____________________________Features
? Precision Supply-Voltage Monitor:
4.65V (MAX81_L)
4.40V (MAX81_M)
? 11μA Quiescent Supply Current
? 200ms Reset Time Delay
? Watchdog Timer with 1.6sec Timeout
(MAX817/MAX818)
? Battery-Backup Power Switching; Battery Voltage
Can Exceed V CC
? Battery Freshness Seal
? On-Board, 3ns Gating of Chip-Enable Signals
(MAX818)
? Uncommitted Voltage Monitor for Power-Fail or
Low-Battery Warning (MAX817/MAX819)
? Manual Reset Input (MAX819)
______________Ordering Information
FEATURE
Active-Low Reset
Backup-Battery Switchover
MAX817
L/M
?
?
MAX818
L/M
?
?
MAX819
L/M
?
?
PART ?
MAX817 _CPA
MAX817_CSA
MAX817_CUA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 μMAX
Power-Fail Comparator
Watchdog Input
Battery Freshness Seal
Manual Reset Input
Chip-Enable Gating
?
?
?
—
—
—
?
?
—
?
?
—
?
?
—
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.
Devices are available in both leaded and lead-free packaging.
Specify lead free by adding the + symbol at the end of the part
number when ordering.
Pin-Package
8-DIP/SO/ 8-DIP/SO/ 8-DIP/SO/
μMAX μMAX μMAX
SUFFIX
RESET THRESHOLD (V)
Low-Power, Pin- MAX690A/
Compatible Upgrades for: MAX692A
—
MAX703/
MAX704
L
M
4.65
4.40
_________________Pin Configurations
________________________Applications
Battery-Powered Computers and Controllers
TOP VIEW
Embedded Controllers
Intelligent Instruments
OUT 1
8
BATT
Critical μP Monitoring
Portable Equipment
V CC 2
GND 3
PFI 4
MAX817
7
6
5
RESET
WDI
PFO
Typical Operating Circuit appears at end of data sheet.
DIP/SO/ μ MAX
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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 |
|---|---|
| MAX819_CPA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:+5V Microprocessor Supervisory Circuits |
| MAX819_CSA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:+5V Microprocessor Supervisory Circuits |
| MAX819_CUA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:+5V Microprocessor Supervisory Circuits |
| MAX819_EPA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:+5V Microprocessor Supervisory Circuits |
| MAX819_ESA | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:+5V Microprocessor Supervisory Circuits |
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