DS1831C

DS1831C/D/E 3.3V/2.5V Multisupply MicroMonitor www.maxim-ic.com FEATURES § 2.5V power-on reset § 3.3V power-on reset § Two referenced comparators with separate outputs for monitoring additional supplies § Internal power is drawn from higher of either the IN2.5V input or the IN3.3V input § Excellent for systems designed to operate with multiple power supplies § Asserts resets during power transients § Pushbutton reset input for system override § Maintains reset for user configurable times of 10ms, 100ms, or 1s § Watchdog timer for software monitoring (DS1831D) § Precision temperature-compensated voltage reference and voltage sensor § 16-pin DIP and 16-pin 150mil SO available § Operating Temperature of -40°C to +85°C DS1831D PIN ASSIGNMENT DS1831C IN2.5V RST2.5V TOL2.5V TD2.5V PBRST2.5V IN1 1 2 3 4 5 6 16 IN3.3V 15 RST3.3V 14 TOL3.3V 13 TD3.3V 12 PBRST3.3V 11 NMI1 IN2 7 10 NMI2 GND 8 9 MPBRST 16-Pin (300mil) DIP & 16-Pin (150mil) SO DS1831E IN2.5V RST2.5V TOL2.5V TD2.5V PBRST2.5V IN1 1 2 3 4 5 6 16 IN3.3V 15 RST3.3V 14 TOL3.3V 13 TD3.3V 12 PBRST3.3V 11 NMI1 IN2.5V RST2.5V TOL2.5V TD2.5V PBRST2.5V IN1 1 2 3 4 5 6 16 IN3.3V 15 RST3.3V 14 TOL3.3V 13 TD3.3V 12 PBST 11 NMI1 ST 7 10 WDS IN2 7 10 NMI2 GND 8 9 TDWD 16-Pin (300mil) DIP & 16-Pin (150mil) SO GND 8 9 MPBRST 16-Pin (300mil) DIP & 16-Pin (150mil) SO DESCRIPTION The DS1831C multisupply monitor and reset monitors up to four system voltages: 2.5V supply, 3.3V (or 3V) supply, and two additional user c...