Product parameters

Funtion：Ultra Low Power Microprocessor Reset IC

Vout Range：1.15V-5.5V

Vin Range：1.15V-5.5V

Operating Current：3.2μA Supply Current @VCC=3V

Package：SOT23-3

Threshold A：±2.5%

Hysteresis：1%

Delayed：140ms min Reset Pulse Width

Reset threshold：4.63V low

Watchdog：No

General Description

The CN803/809/810 series are micro- processor (μP) supervisory circuits used to monitor the power supplies in μP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components.

These circuits perform a single function: they assert a reset signal whenever the V_CC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after V_CC has risen above the reset threshold.

The CN809/810 have CMOS outputs, the CN803 has open drain output. The CN803/809 have an active-low output, while the CN810 has an active-high RESET output. The reset comparator is designed to ignore fast transients on V_CC, and the outputs are guaranteed to be in the correct logic state for V_CC down to 1.15V over the temperature range.

The device is available in 3 pin SOT23 package.

Applications

l  Computers

l  Portable/Battery-Powered Equipment

l  Intelligent Instruments

l  Controllers

Features

l  Precise Reset Threshold: ±2.5%

l  CMOS Output(CN809/810) and Open Drain Output(CN803)

l  140ms min Reset Pulse Width

l  3.2μA Supply Current @V_CC=3V

l  Guaranteed Reset Valid to V_CC = +1.15V

l  Power Supply Transient Immunity

l  Operating Temperature Range

      -40°C to +85°C

l  Available in SOT23-3