Philips Semiconductors

Product data

MAX809/MAX810

3-pin microprocessor resets

2

2003 Aug 08

DESCRIPTION

The MAX809/MAX810 are single function microprocessor resets

used to monitor supply voltages in microprocessor and other logic

systems. They provide a reset signal to the microprocessor during

power-up, power-down, and brownout conditions. The reset signal is

asserted when the supply voltage drops below the preset threshold,

and the signal is released a set time after the supply voltage has

risen above the preset threshold.

The MAX809 has an active-LOW reset output while the MAX810

has an active-HIGH reset output.

The low supply current of typically 17

µA makes the

MAX809/MAX810 ideal for use in portable, battery operated

equipment. They are available in the 3-pin SOT23 and SC70

packages.

FEATURES

– Active-LOW RESET output (MAX809)

– Active-HIGH RESET output (MAX810)

APPLICATIONS

SIMPLIFIED SYSTEM DIAGRAMS

GND

GND

RESET

RESET INPUT

SL01642

MAX809

MICROPROCESSOR

Figure 1. MAX809 simplified system diagram.

GND

GND

RESET

RESET INPUT

SL01643

MAX810

MICROPROCESSOR

Figure 2. MAX810 simplified system diagram.