DESCRIPTION

The A4810A/B microprocessor supervisory circuit can be used to monitor the power supplies in microprocessor and digital systems. It provides

reset to the microprocessor during power-up, power-down, and brown-out conditions.

The function of the A4810A/B is to monitor the VDD supply voltage, and assert a reset signal whenever this voltage declines below the factory-programmed reset threshold. The reset signal remains asserted for 250ms after VDD rises above the threshold. The A4810A/B has an active-low /RESET output.

With a low supply current of only 2μA (Typ.), the A4810A/B are ideal for use in portable equipment.

A4810A/B

is available in SOT 23 package.

FEATURES

? Precise monitoring of 2.7V, 3.0V, 3.3V and 5.0V supplies

? 140 ms min. Power-On Reset pulse width, 250ms typical, has an active-low /RESET Output

? Guaranteed /RESET Output valid for VDD≥1.1V

? Low Supply Current, 2μA Typ.

? No external components needed

? Specified over full temperature range

A4810A: 0°C to +70°C,

A4810B: -40°C to +105°C

? A vai lable in SOT 23 package

APPLICATION

? Microprocessor Systems

? Computers

? Controllers

? Intelligent Instruments

? Portable/Battery-Powered Equipment

? Automotive