Product Description

The UM809/810 series are ultra low current, cost effective system supervisory circuits designed to monitor the power supplies in digital systems. They provide a reset ** to the host processor when necessary, offer excellent circuit reliability & low cost by eliminating external component and adjustment when used with +5V, +3.3V, +3.0V or other voltage powered circuits.

The reset output is driven active within 10μs of power supply falling through the reset voltage threshold. Reset is keeping active for a minimum of 140ms after system power supply has risen above the reset threshold. Reset threshold suitable for operation with variety of supply voltage are available.

UM809 has an active-low reset output while UM810 has an active-high reset output. The UM809/810 are optimized to reject fast transient glitches on the power supply line, and the reset output are guaranteed to be in the correct logic state for power supply VCC down to 1V.

Each of these ICs consists of a voltage reference comparator, resistors for detector threshold setting, delay generator, output driver & hysteresis circuit. The reset threshold & time delay are fixed with high accuracy internally and does not require any external adjustment. 

Low supply current of 3μA (VCC=3V) makes UM809/810 ideal for low power application. Both devices are available in 3 Pin SOT323 or SOT23 packages.

 

Features

 

- Wide Operation Voltage Range of 1V to 10V

- Typical Quiescent Current of 3μA

- No External Components

- 3-Pin Small SOT323 and SOT23 Packages

- VCC Transient Immunity

- Correct Logic Output Guaranteed to VCC=1.0V

- Precision VCC Monitor for 2.5V, 3.0V, 3.3V and 5.0V Supplies

- Available in 2 Output Configurations

 Push-Pull Low Active Reset Output (UM809)

 Push-Pull High Active Reset Output (UM810)

- Wide Operation Temperature: -40°C to +85°CApplications

 

- CPU and Logic Circuit Reset

- Power Fail Detectors

- Computers

- Embedded Systems

- Battery-Powered Equipments

- Intelligent Instruments

創(chuàng)達佳科技有限公司是一家專業(yè)代理和銷售世界各大品牌電子元器件的大型公司。公司成立于2010年,經(jīng)過多年的發(fā)展分支機構遍布**,除了位于深圳的總公司外,還在美洲、歐洲、中國香港及北京、上海、浙江設立了分公司。長期以來公司始終堅持“客戶至上,品質*一”理念,在業(yè)界享有盛譽。經(jīng)營領域涉及：消費類電子,**,電腦及其周邊設備,通信設備,工業(yè)控制,汽車電子,安防,電源控制,新能源,醫(yī)療設備,儀器儀表等。
目前我們代理和經(jīng)銷的品牌有300個,分銷產(chǎn)品線**過3000條。在**有三大倉庫（分布在海外,中國香港,深圳）,保有上億資金的現(xiàn)貨庫存。從產(chǎn)品、技術,服務及賬期方面都可以為客戶提供全方面的支持。