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參數(shù)資料
| 型號(hào)： | AS1923A-BSTT-O |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Quad-Input Supervisory Circuit; Package Type: SOT23-6; Reset Type: Open-Drain; Supervised Voltages (IN1): 5,00; Supervised Voltages (IN2): 3,30; Supervised Voltages (IN3): 1,23-5,50; Supervised Voltages (IN4): -5 |
| 封裝： | SOT23-6 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 402K |
| 代理商： | AS1923A-BSTT-O |
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Datasheet
1 General Description
The AS1923 mcroprocessor supervisory circuit was designed to
monitor up to four systemsupply voltages without the need for exter-
nal components, and asserts a single reset if any of the monitored
supply voltages drops below its reset threshold.
The AS1923 features an active-low reset output that is asserted
when any of the 4 monitored voltages are below their respective
reset threshold. The reset output is open-drain with a weak internal
pullup (10μA) to IN2. Reset remains low for a specified reset timeout
period (120ms mn) after all voltages have stabilized. The output is
valid as long as the IN1 or IN2 input voltage remains >1V.
Mnimal external component requirements, small size, and wide tem-
perature range (-40 to +85°C) greatly improves reliability compared
to individual supervisory circuits or discrete components.
A wide range of factory-trimmed threshold voltages are available to
accommodate many different supply voltages/tolerances with mni-
mal external component requirements.
Factory-trimmed options are available for monitoring +5.0, +3.3,
+3.0, +2.5, +1.8, and -5.0V supplies with -5% and/or -10% toler-
ances. The device is also available with one or two user-adjustable
threshold options (via external resistor-divider network) if non-stan-
dard voltage thresholds are required.
The AS1923 is available in an 6-pin SOT23 package.
Figure 1. AS1923 - Typical Application
2 Key Features
Simultaneous Quad-Voltage Monitoring
Precision Factory-Trimmed Reset Threshold Options: +5.0,
+3.3, +3.0, +2.5, +1.8, and -5.0V
User-Adjustable Voltage Monitoring Threshold Options
Low Supply Current: 55μA
Open-Drain – AS1923A
10μA Current Source Pullup – AS1923B
Reset Timeout Period: 120ms
RESET Valid to IN1 = 1V or IN2 = 1V
Immune to Fast IN
x
Transients
External Components not Required
Guaranteed Performance: Operating Temperature Range = -40
to +85oC
6-pin SOT23 Package
3 Applications
The device is ideal for portable and battery-powered systems,
embedded controllers, intelligent instruments, automotive systems,
critical CPU monitoring, and any multi-supply application.
4
IN1
GND 2
AS1923
CPU
Monitoring
Voltage 1
Monitoring
Voltage 2
Monitoring
Voltage 3
Monitoring
Voltage 4
6
IN3
1
IN4
5
IN2
3
RESETN
RESETN
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS1926-BSTT-D07 | Low Voltage, Manual Reset; Package Type: SOT23-5; Reset Type: Open-Drain Active Low; Timeout Period: 140,00; Supervised Voltages (IN1): 0,81 |
| AS1972 | Dual Comparator, Push-Pull; Package Type: MSOP-8 |
| AS1974 | Quad Comparator, Push-Pull; Package Type: TSSOP-14 |
| AS1975 | Quad Comparator, Open-Drain; Package Type: TSSOP-14 |
| AS1970-T | Single Comparator, Push-Pull; Package Type: SOT23-5 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1923A-BSTT-x | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Quad-Voltage Microprocessor Supervisory Circuit |
| AS1923B-BSTT-x | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Quad-Voltage Microprocessor Supervisory Circuit |
| AS1925 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Ultra-Low Voltage Microprocessor Supervisory Circuit with Manual Reset |
| AS1925-BSTT | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Ultra-Low Voltage Microprocessor Supervisory Circuit with Manual Reset |
| AS1925BSTTD07 | 制造商:ams 功能描述:IC MPU SUPERVISOR 12 uA 1.8V 5-SOT-2 制造商:ams 功能描述:T&R / SOT23-5 |
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