DS1831A Datasheet | Maxim Integrated

FEATURES - - - - - - - - - - - - 5V power-on reset 3.3V power-on reset Two referenced parators with separate outputs for monitoring additional supplies Internal power is drawn from higher of either the IN5V 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 (DS1831A) Precision temperature-pensated voltage reference and voltage sensor 16 pin DIP and 16 pin 150mil SO available Operating Temperature of -40°C to +85°C DS1831A IN5V RST5V TOL5V TD5V PBRST5V IN1 ST GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 IN3.3V RST3.3V TOL3.3V TD3.3V PBRST3.3V NMI1 WDS TDWD 16-Pin (300mil) DIP & 16-Pin (150mil) SO DS1831B IN5V RST5V TOL5V TD5V PBRST5V IN1 IN2 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 IN3.3V RST3.3V TOL3.3V TD3.3V PBST NMI1 NMI2 MPBRST 16-Pin (300mil) DIP & 16-Pin (150mil) SO 16-Pin (300mil) DIP & 16-Pin (150mil) SO DESCRIPTION The DS1831 multisupply monitor and reset monitors up to four system voltages: 5V supply, 3.3V (or 3V) supply, and two additional user configurable voltage monitors. DS1831 power for internal operation es from the higher voltage level of the 3.3V input or the 5V input. One of these inputs must be greater than 1V for device operation. Pushbutton (manual reset) functionality is provided for the 5V reset, the 1 of 14 060303 DS1831/A/B 3.3V reset or for all reset outputs by the master pushbutton. The DS1831A replaces one reference parator and the master pushbutton with watchdog and the DS1831B replaces the 3.3V PBRST with a last reset status output. .. TOL and TD inputs allow user configuration of the DS1831 for multiple applications. The TOL inputs configure the tolerance for the specified output and the TD inputs configure the reset time delays. PIN DESCRIPTION IN5V RST 5V TOL5V TD5V PBRST 5V IN1 IN2 ST GND 5V...