General Description

The MAX6301–MAX6304* low-power microprocessor (µP) supervisory circuits provide maximum adjustability for reset and watchdog functions. The reset threshold can be adjusted to any voltage above 1.22V, using external resistors. In addition, the reset and watchdog timeout periods are adjustable using external capacitors. A watchdog select pin extends the watchdog time out period to 500x. The reset function features immunity to power-supply transients.

These four devices differ only in the structure of their reset outputs (see the Selector Guide). The MAX6301–MAX6304 are available in the space-saving 8-pin µMAX® package, as well as 8-pin PDIP and SO packages.

Features

♦ Adjustable Reset Threshold

♦ Adjustable Reset Timeout

♦ Adjustable Watchdog Timeout

♦ 500x Watchdog Timeout Multiplier

♦ 4µA Supply Current

♦ RESET or RESET Output Options

♦ Push-Pull or Open-Drain Output Options

♦ Guaranteed RESET Asserted At or Above

   VCC = 1V (MAX6301/MAX6303)

♦ Power-Supply Transient Immunity

♦ Watchdog Function can be Disabled

♦ PDIP/SO/µMAX Packages Available

Applications

  Medical Equipment

  Embedded Controllers

  Intelligent Instruments

  Critical µP Monitoring

  Portable Equipment

  Set-Top Boxes

  Battery-Powered

  Computers

  Computers/Controllers