TPS3828

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 V_DD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors V_DD and keeps RESET active low as long as V_DD remains less than the threshold voltage, V_IT−. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, t_d, starts after V_DD has risen above the threshold voltage (V_IT− + V_HYS). When the supply voltage drops below the threshold voltage V_IT−, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, V_IT–, set by an internal voltage divider. The TPS382x family also offers watchdog time out options of 200 ms (TPS3820) and 1.6 s (TPS3823, TPS3824, and TPS3828).