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參數資料
| 型號： | DS1819 |
| 英文描述： | 5V and 3.3V MicroMonitor |
| 文件頁數： | 1/8頁 |
| 文件大小： | 146K |
| 代理商： | DS1819 |
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122001
FEATURES
Halts and restarts an out-of-control
microprocessor
Holds microprocessor in check during power
transients
Automatically restarts microprocessor after
power failure
Monitors pushbutton for external override
Accurate 5%, 10%, or 20% (3V only)
microprocessor power monitoring
Eliminates the need for discrete components
20% tolerance for use with 3.0V systems
Pin- and function-compatible with the
MAX823/24/25 products
Low cost SOT-23-5 package
Industrial temperature range: -40 C to +85 C
DEVICE
RST
X
X
X
RST
PBRST
X
WD
DS181xA
DS181xB
DS181xC
x = "DS1814" for 5V devices
x = "DS1819" for 3V devices
X
X
X
X
X
PIN ASSIGNMENT
PIN DESCRIPTION
DS181xA
1
RST
2
GND
3
PBRST
4
ST
5
VCC
Active Low Reset Output
Ground
Pushbutton Reset Input
Strobe Input
Power Supply
DS181xB
1
2
GND
3
RST
4
ST
5
VCC
RST
Active Low Reset Output
Ground
Active High Reset Output
Strobe Input
Power Supply
DS181xC
1
2
GND
3
RST
4
5
VCC
RST
Active Low Reset Output
Ground
Active High Reset Output
Pushbutton Reset Input
Power Supply
PBRST
DESCRIPTION
The DS1814 5-Volt MicroMonitor and the DS1819 3.3V MicroMonitor monitor three vital conditions for
a microprocessor: power supply, software execution, and external override. First, a precision temperature-
compensated reference and comparator circuit monitor the status of V
CC
. When an out-of-tolerance
condition occurs, an internal power-fail signal is generated which forces the reset(s) to an active state.
When V
CC
returns to an in-tolerance condition, the reset signal is kept in the active state for a minimum of
140ms to allow the power supply and processor to stabilize.
DS1814/DS1819
5V and 3.3V MicroMonitor
www.maxim-ic.com
3
2
1
4
5
SOT-23-5 PACKAGE
See Mech. Drawing
相關PDF資料 |
PDF描述 |
|---|---|
| DS1819B | 5V and 3.3V MicroMonitor |
| DS1819C | 5V and 3.3V MicroMonitor |
| DS1815 | 3.3V EconoReset with Push-Pull Output |
| DS1815-10 | 3.3V EconoReset with Push-Pull Output |
| DS1815-15 | 3.3V EconoReset with Push-Pull Output |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1819A | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:5V and 3.3V MicroMonitor |
| DS1819AR-05 | 制造商:Maxim Integrated Products 功能描述: |
| DS1819AR-10/T&R | 制造商:Maxim Integrated Products 功能描述:UMON PBRST WD SOT23 3.3V 10% T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MICROMON 3V W/PBRST SOT-23-5 制造商:Maxim Integrated Products 功能描述:Supervisory Circuits 3.3/5V MicroMonitor |
| DS1819AR-10/T&R | 功能描述:監控電路 3.3/5V MicroMonitor RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關: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 |
| DS1819AR-10/TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
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