MAX800M

Click here for production status of specific part numbers. MAX691A/MAX693A/ MAX800L/MAX800M Microprocessor Supervisory Circuits General Description The MAX691A/MAX693A/MAX800L/MAX800M microprocessor (μP) supervisory circuits are pin-compatible upgrades to the MAX691, MAX693, and MAX695. They improve performance with 30μA supply current, 200ms typ reset active delay on power-up, and 6ns chip-enable propagation delay. Features include write protection of CMOS RAM or EEPROM, separate watchdog outputs, backup-battery switchover, and a RESET output that is valid with VCC down to 1V. The MAX691A/ MAX800L have a 4.65V typical reset-threshold voltage, and the MAX693A/MAX800Ms’ reset threshold is 4.4V typical. The MAX800L/MAX800M guarantee power-fail accuracies to ±2%. Applications ●● Computers ●● Controllers ●● Intelligent Instruments ●● Critical μP Power Monitoring Typical Operating Circuit 5V +8V REGULATOR 0.1µF 1N4148 0.47F* 35 VCC BATT ON VOUT 2 1 VBATT CE OUT 12 NO CONNECTION CMOS RAM MAX691A 9 PFI MAX693A MAX800L CE IN 13 4 MAX800M GND 11 WDI 7 OSC IN PFO 10 8 OSC SEL RESET 15 LOW LINE WDO ADDRESS DECODE A0-A15 I/O µP NMI RESET 6 14 AUDIBLE ALARM *MaxCap SYSTEM STATUS INDICATORS MaxCap is a registered trademark of Kanthal Globar, Inc. Features ●● 200ms Power-OK/Reset Timeout Period ●● 1μA Standby Current, 30μA Operating Current ●● On-Board Gating of Chip-Enable Signals, 10ns max Delay ●● MaxCap® or SuperCap Compatible ●● Guaranteed RESET Assertion...