MAX6805

The MAX6803/MAX6804/MAX6805 microprocessor (P) upervisory circuits monitor the power supplies in 2.85V o 5.0V P and digital systems. They increase circuit eliability and reduce cost by eliminating external components nd adjustments. They also feature a ebounced manual reset input.

These devices perform a single function: they assert a eset signal whenever the VCC supply voltage declines elow a preset threshold or whenever manual reset is sserted. Reset remains asserted for a preset timeout eriod after VCC has risen above the reset threshold or fter manual reset is deasserted. The only difference mong the three devices is their output. The MAX6804 push/pull) and MAX6805 (open-drain) have an activelow ESET output, while the MAX6803 (push/pull) has n active-high RESET output. The MAX6803/MAX6804 re guaranteed to be in the correct state for V_CC down o 0.7V. The MAX6805 is guaranteed to be in the correct tate for V_CC down to 1.0V.

The reset comparator in these ICs is designed to ignore ast transients on V_CC. Reset thresholds are factorytrimmable etween 2.63V and 4.80V, in approximately 00mV increments. These devices are available with a ms min, 20ms min, or 100ms min reset timeout period.

Ideal for space-critical applications, the MAX6803/ AX6804/MAX6805 come packaged in a 4-pin OT143. For a lower threshold voltage version, see the AX6335/MAX6336/MAX6337.