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參數資料
| 型號： | FH809T-E |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | SOT-23, 3 PIN |
| 文件頁數： | 1/3頁 |
| 文件大小： | 144K |
| 代理商： | FH809T-E |
IC
3-Pin Microprocessor Reset Monitor
電壓檢測積體電 FH809
1
Pin Configuration 管腳配置
Pin Description 管腳描述
Pin No.
Symbol
Description
1
GND
Ground
2
RESET
RESET output remains low while Vcc is below the reset voltage threshold and for
240msec(typ) after Vcc rises above reset threshold
3
Vcc
Supply Voltage (typ.)輸入電源
DESCRIPTION & FEATURES
概述及特點
The FH809 is a cost-effective system supervisor
Integrated Circuit (IC) designed to monitor VCC in digital
and mixed signal systems and provide a warning signal
when the system power supply is out of working range,
and a reset signal to the host processor when necessary.
No external components are required.
The reset output is driven active within 20μsec of VCC
falling through the reset voltage threshold. Reset is
maintained active for a minimum of 140msec after VCC
rises above the reset threshold. Devices are available in a
SOT-23 package.
The FH809 is optimized to reject fast transient glitches
on the VCC line. Low supply current of 18μA (VCC=3.3V)
makes these devices suitable for battery powered
applications.
FH809 系產品具有效極高的檢測系統集成電
,設計用於監控位和混合信號電中,當供應電
源超出工作範圍時提供一個預先的信號.而且提供一
個 RESET 信號給主處器,無需外加的器件.
重置輸出電壓在 20uS 內可以關斷當輸入電壓低
于關斷電壓,重置電壓要重新維持啟動態需在輸
入電壓上升到關斷電壓以上後最小 140mS 時間.器
件可以封裝 SOT-23.
FH809 通過優化可以免去 VCC 端的瞬間的脈衝干擾,
低靜態電可達 18uA(VCC=3.3V),使器件適合用於
電池電源應用.
Precision VCC Monitor for 2.8V, 3.0V, 3.3V, and
5.0V Supplies
140msec Guaranteed Minimum RESET Output
Duration
Low 18μA Supply Current
VCC Transient Immunity
Small SOT-23 Package
No External Components
Wide Operating Temperature: 0°C to 85°C
精密的 VCC 電壓監控 2.8V,3.0V,3.3V 和 5.0V
最短重置輸出延遲時間 140mS
低靜態電 18uA
VCC
瞬間的脈衝干擾免疫
小封裝：SOT-23
無附加器件
寬工作溫範圍: 0°C to 85°C
Applications
應用
Computers
Embedded systems
Battery powered equipment
Critical μP power supply monitoring
電腦
植入的系統
電池供應電源設備
緊急的UPS監控
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