19-1122; Rev 1; 12/99
MAX821/MAX822
4-Pin µP
Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay
General Description
The MAX821/MAX822 microprocessor (µP) supervisory circuits monitor power supplies in µP and digital systems.
They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered or 3V-powered circuits.
The MAX821/MAX822 also provide a power-on reset timeout delay that is pin selectable to 1ms (max), 20ms (min), or 100ms (min).
These devices perform a single function: they assert a reset signal whenever the VCC supply
voltage falls below a preset threshold, and they keep reset asserted for the pin-...