New Industry Products

Maxim Integrated Products Debuts MAX6381 - MAX6390 Supervisory Circuits

December 10, 2000 by Jeff Shepard

Maxim Integrated Products (Sunnyvale, CA) has introduced the MAX6381 through MAX6390 microprocessor µP supervisory circuits. Designed to monitor supply rails of 1.8V to 5V in µP and digital systems, these SC70 devices consume 3µA, making them suitable for portable applications.

Whenever a monitored voltage falls below the reset threshold, the reset output asserts and remains asserted for a minimum reset timeout period after Vcc rises above the reset threshold. Reset thresholds are available from 1.58V to 4.63V, in approximately 100mV increments. Seven reset timeout periods are available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms, and 1,200ms.

The new devices are available with three reset options: an active-low, push-pull output; an active-high, push-pull output; and an active-low, open-drain output. Additional features include a manual reset input or an auxiliary reset input that allows a second voltage to be monitored down to 1.27V. The MAX6390 includes a timing combination of a 1.12s VCC (or 1.2s) reset timeout and a 140ms (or 150ms) manual reset timeout.

These devices are available in 3-pin or 4-pin SC70 packages. Prices start at $0.96 each in 2,500 or 10,000 minimum quantities, respectively.