Ultra-small microprocessor supervisor offers low-voltage monitoring

The MAX16055 hex-voltage microprocessor supervisor with integrated reset timing eliminates the need for an external capacitor. Featuring an ultra-small, 3 x 3 mm footprint, this device is suitable for low-voltage monitoring in multi-voltage systems such as telecommunications, networking equipment, storage devices, high-end printers, and computers.

Whenever one of the six monitored voltages falls below its threshold, the open-drain reset output asserts and remains asserted for at least 140 ms after all six voltages exceed their respective thresholds. The reset output is internally pulled up to Vcc to eliminate the need for an external resistor, but can be overdriven to accommodate other logic devices. A manual reset is also provided.

Ten versions of the MAX16055 are available, which provide different thresholds and supply tolerances to meet all low-voltage system requirements. Preset thresholds for monitoring 3.3, 3, 2.5, 1.8, 1.5, 1.2, 1.1, 1.0, and 0.9 V supplies with -5 and -10% tolerance are available; additionally, adjustable versions are available to accommodate most of today's standard logic devices.

This device operates from 1 to 5.5 V with the power derived from one of the monitored inputs, thereby eliminating the need for a separate Vcc pin. The MAX16055 consumes only 25 microamps of quiescent current. Fully specified over the -40° to 125° C automotive temperature range, the MAX16055 is available in a space-saving, 3 x 3 mm, 10-pin microMAX(R) package.

For more information, visit Maxim Integrated Products.