voltage supervisor (reset IC) with manual reset

The TPS382x family of supervisors

provide circuit initialization and timing supervision, primarily for DSP and

processor-based systems. During power on, RESET asserts when

the supply voltage VDD becomes greater than 1.1V. Thereafter, the supply

voltage supervisor monitors VDD and keeps RESET

active low as long as VDD remains less than the threshold voltage,

VIT−. An internal timer delays the return of the output to the

inactive state (high) to make sure proper system reset. The delay time,

td, starts after VDD has risen above the threshold voltage

(VIT− + VHYS). When the supply voltage drops below the

threshold voltage VIT−, the output becomes active (low) again. No

external components are required. All the devices of this family have a fixed-sense

threshold voltage, VIT–, set by an internal voltage divider. The TPS382x

family also offers watchdog time out options of 200ms (TPS3820) and 1.6s (TPS3823,

TPS3824, and TPS3828).