TPS3823-33DBVR ACTIVE

Features for the TPS3823

• Power-On reset generator with fixed delay time of 200 ms (TPS3823/4/5/8) or 25 ms (TPS3820)
• Manual reset input (TPS3820/3/5/8)
• Reset output available in active-low (TPS3820/3/4/5), active-high (TPS3824/5), and open drain (TPS3828)
• Supply voltage supervision range:
  2.5 V, 3 V, 3.3 V, 5 V
• Watchdog timer (TPS3820/3/4/8)
• Supply current of 15 µA (Typical)
• 5-Pin SOT-23 package
• Temperature range: −40°C to 85°C (−40°C to 125°C for TPS3823A-33)

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Description for the TPS3823

The TPS382x family of supervisors provide circuitinitialization and timing supervision, primarily for DSP and processor-based systems. During poweron, RESET asserts when the supply voltage V_DD becomesgreater than 1.1 V. Thereafter, the supply voltage supervisor monitors V_DDand keeps RESET active low as long as V_DD remainsless than the threshold voltage, V_IT−. An internal timer delays the returnof 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 thresholdvoltage (V_IT− + V_HYS). When the supply voltage dropsbelow the threshold voltage V_IT−, the output becomes active (low) again. Noexternal components are required. All the devices of this family have a fixed-sense thresholdvoltage, V_IT–, set by an internal voltage divider. The TPS382x family alsooffers watchdog time out options of 200 ms (TPS3820) and 1.6 s (TPS3823/4/8).