MAX811

Terminal Voltage (with respect to GND)
V_CC ......................................................................-0.3V to 6.0V
All Other Inputs........................................-0.3V to (V_CC + 0.3V)
Input Current, V_CC, MR.....................................................20mA
Output Current, RESET or RESET........................... ..........20mA
Continuous Power Dissipation (T_A = +70)
SOT143 (derate 4mW/ above +70)........................ 320mW
Operating Temperature Range ...........................-40 to +85
Storage Temperature Range .............................-65 to +160
Lead Temperature (soldering, 10sec) .............................+300

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX811/MAX812 are low-power microprocessor (P) supervisory circuits used to monitor power supplies in P and digital systems. hey provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5Vpowered or 3V-powered circuits. The MAX811/MAX812 also provide a debounced manual reset input.

These MAX811 perform a single function: They assert a reset signal whenever the V_CC supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after V_CC has risen above the reset threshold. The only difference between the two devices is thatthe MAX811 has an active-low RESET output (which is guaranteed to be in the correct state for V_CC down to 1V), while the MAX812 has an active-high RESET output. The reset comparator of MAX811 is designed to ignore fast transients on V_CC. Reset thresholds are available for operation with a variety of supply voltages.

Low supply current makes the MAX811/MAX812 ideal for use in portable equipment. The devices come in a 4-pin SOT143 package.