MPU supervisor provides precision power monitoring

Sunnyvale, Calif. — Maxim Integrated Products has introduced the MAX6394, a low-power, +/-1% accurate microprocessor supervisor. This device provides high reliability by integrating a highly precise bandgap reference that allows Maxim to trim reset thresholds to +/-0.6% accuracy at room temperature. This higher supervisor accuracy results in a smaller, tighter reset guard band that is closer to the desired RESET threshold, Maxim said.

Touted as Maxim's highest accuracy microprocessor supervisor, the MAX6394 is well-suited for critical microprocessor and microcontroller power-monitoring applications, portable equipment, and any other applications that require precision monitoring. Fully specified over the -40°C to +125°C automotive temperature range, the MAX6394 is available in a small, 4-pin SOT143 package.

The MAX6394 is factory programmed to any of 36 different options. Nine fixed voltage thresholds are available, each with four preset timeout periods (0.7, 14, 105, and 826 ms). These options allow designers to tailor the MAX6394 to specific applications without additional external components or design time.

This supervisor also provides an open-drain output that can be pulled up to 6 V, even when Vcc is less than the pull-up voltage. This allows designers to use a separate pull-up voltage to ensure that the correct logic levels are reached. The ability to pull the reset voltage above Vcc eliminates the need for additional level translators, further reducing component cost, Maxim said.

Pricing: Starts at $1.57 (1000-up, FOB USA).
Datasheet: MAX6394

Maxim Integrated Products , 1-800-998-8800,

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