1/10

Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.3 Nov.14, 2019

AX6905/6

3-Pin Microprocessor Reset Circuits



GENERAL DESCRIPTION

The AX6905/6 is used for microprocessor (μP) supervisory circuits to monitor the

power supplies in µP and digital systems. They provide excellent circuit reliability and low

cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V,

+2.5V powered circuits.

These circuits perform a single function: they assert a reset signal whenever the VCC

supply voltage declines below a preset threshold, keeping it asserted for at least 200ms after

VCC has risen above the reset threshold. Reset thresholds suitable for operation with a

variety of supply voltages are available. The AX6905/6 has push pull outputs. The AX6905

have an active low RESET output, while the AX6906 has an active high RESET output.

The reset comparator is designed to ignore fast transients on VCC, and the outputs are

guaranteed to be in the correct logic state for VCC down to 1.0V. Low supply current makes

the AX6905/6 ideal for use in portable equipment. The AX6905/6 is available in a 3-pin

SOT-23 package.



FEATURES

- Precision Monitoring of +2.5,+3V, +3.3V, and +5V Power-Supply Voltages

- Fully Specified Over Temperature

- Available in Three Output Configurations

- Push-Pull

RESETLow Output(AX6905)

- Push-Pull RESET High Output(AX6906)

- 200ms (Typ.)min Power-On Reset Pulse Width

- 25µA Supply Current

- Guaranteed Reset Valid to VCC = +1.0V

- Power Supply Transient Immunity

- No External Components

- Available in the 3-Pin Pb-Free SOT-23 Package

- RoHS and Halogen free compliance.