Datasheet Texas Instruments TPS3820-33DBVTG4 — Datenblatt

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SLVS165L – APRIL 1998 – REVISED JANUARY 2018 TPS382x Voltage Monitor With Watchdog Timer
1 Features 3 Description 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 1.1 V. 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
ensure 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 …