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參數(shù)資料
| 型號： | DS1819A |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 3.3 Volt EconoMonitor(3.3 V Econo復(fù)位監(jiān)控器) |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 58K |
| 代理商： | DS1819A |
DS1814/DS1819
5 Volt and 3.3 Volt EconoMonitor
DS1814/DS1819
PRODUCT PREVIEW
061198 1/8
FEATURES
Halts and restarts an out–of–control microprocessor
Holds microprocessor in check during power tran-
sients
Automatically restarts microprocessor after power
failure
Monitors pushbutton for external override
Accurate 5%, 10% or 20% (3 volt only) Microproces-
sor power monitoring
Eliminates the need for discrete components
20% tolerance for use with 3.0 volt systems
Pin and function compatible with the MAX823/24/25
products
Low cost SOT–23–5 package
Industrial temperature –40
°
C to +85
°
C
DEVICE
RST
RST
PBRST
WD
DS181xA
DS181xB
DS181xC
X
X
X
X
X
X
X
X
X
X = ‘4’ for 5 volt devices
X = ‘9’ for 3 volt devices
PIN ASSIGNMENT
4
5
2
SOT–23–5 PACKAGE
See Mech. Drawing
3
1
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 RST
2 GND
3 RST
4 ST
5 VCC
Active Low Reset Output
Ground
Active High Reset Output
Strobe Input
Power Supply
DS181xC
1 RST
2 GND
3 RST
4 PBRST
5 VCC
Active Low Reset Output
Ground
Active High Reset Output
Pushbutton Reset Input
Power Supply
DESCRIPTION
The DS1814 5 volt EconoMonitor and the DS1819
3.3 volt EconoMonitor monitors three vital conditions for
a microprocessor: power supply, software execution,
and external override. First, a precision temperature
compensated reference and comparator circuit moni-
tors the status of V
CC
. When an out–of–tolerance
condition occurs, an internal power fail signal is gener-
ated which forces the reset(s) to an active state. When
V
CC
returns to an in–tolerance condition, the reset sig-
nal is kept in the active state for a minimum of 140 ms to
allow the power supply and processor to stabilize.
The DS1814/DS1819 ‘A’ and ‘C’ perform pushbutton
reset control. They debounce the pushbutton input and
generate an active reset pulse width of 140 ms mini-
mum. The DS1814/9 ‘A’ and ‘B’ versions perform a
watchdog function. The watchdog is an internal timer
that forces the reset signals to the active state if the
strobe input does not change state every 1.12 seconds.
The watchdog timer function can be disabled by leaving
the watchdog strobe input unconnected.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1819B | 3.3 Volt EconoMonitor(3.3 V Econo復(fù)位監(jiān)控器) |
| DS1819C | 3.3 Volt EconoMonitor(3.3 V Econo復(fù)位監(jiān)控器) |
| DS1814C | 5 Volt Volt EconoMonitor(5 V Econo復(fù)位監(jiān)控器) |
| DS1815 | 3.3V EconoReset with Push-Pull Output(推拉輸出的3.3V Econo復(fù)位電路) |
| DS1816 | 3.3V EconoReset with Open Drain Output(帶漏極開路輸出的3.3V Econo復(fù)位電路) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(jiān)控電路 3.3/5V MicroMonitor 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(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 |
| DS1819AR-10+T&R | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 12UA 5PIN SOT-23 - Tape and Reel 制造商:Maxim Integrated Products 功能描述:3.3V-10% PBRST WD LEAD FREE 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 12UA 5PIN SOT-23 - Cut TR (SOS) 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:IC MICROMONITOR 3V PBRST SOT23-5 制造商:Maxim Integrated Products 功能描述:IC MICROMONITOR 8 5.5V 5 制造商:Maxim Integrated Products 功能描述:Supervisory Circuits 3.3/5V MicroMonitor |
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