MAX807M Datasheet | Maxim Integrated

Description The MAX807 microprocessor (µP) supervisory circuit reduces the plexity and number of ponents needed to monitor power-supply and battery-control functions in µP systems. A 70µA supply current makes the MAX807 ideal for use in portable equipment, while a 2ns chip-enable propagation delay and 250m A output current capability (20m A in battery-backup mode) make it suitable for larger, higher-performance equipment. The MAX807 es in 16-pin DIP and SO packages, and provides the following functions: 1) µP reset. The active-low RESET output is asserted during power-up, power-down, and brownout conditions, and is guaranteed to be in the correct state for VCC down to 1V. 2) Active-high RESET output. 3) Manual-reset input. 4) Two-stage power-fail warning. A separate low-line parator pares VCC to a threshold 52m V above the reset threshold. This low-line parator is more accurate than those in previous µP supervisors. 5) Backup-battery switchover for CMOS RAM, real-time clocks, µPs, or other low-power logic. 6) Write protection of CMOS RAM or EEPROM. 7) 2.275V threshold detector- provides for power-fail warning and low-battery detection, or monitors a power supply other than +5V. 8) BATT OK status flag indicates that the backup-battery voltage is above 2.275V. 9) Watchdog-fault output- asserted if the watchdog input has not been toggled within a preset timeout period. ____________________________Features o Precision 4.675V (MAX807L) or 4.425V (MAX807M), or 4.575V (MAX807N) Voltage Monitoring o 200ms Power OK / Reset Time Delay o RESET and RESET Outputs o Independent Watchdog Timer o 1µA Standby Current o Power Switching: 250m A in VCC Mode 20m A in Battery-Backup Mode o On-Board Gating of Chip-Enable Signals: 2ns CE Gate Propagation Delay o Max Cap™ and Super Cap™ patible o Voltage Monitor for Power-Fail o Backup-Battery Monitor o Guaranteed RESET Valid to VCC = 1V o ±1.5% Low-line Threshold Accuracy 52m V above Reset Threshold MAX807L/M/N __________________Pin...