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Active-low, push-pull, voltage supervisor (reset IC) with 1.6-s watchdog & manual reset

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TPS3823-33DBVR General 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 time out options of 200 ms (TPS3820) and 1.6 s (TPS3823, TPS3824, and TPS3828).

Key Features

  • Power-on reset generator with a fixed delay time of 200 ms (TPS3823, TPS3824, TPS3825, and TPS3828) or 25 ms (TPS3820)
  • Manual reset input (TPS3820, TPS3823, TPS3825, and TPS3828)
  • Reset output available in active-low (TPS3820, TPS3823, TPS3824, and TPS3825), active-high (TPS3824 and TPS3825), and open drain (TPS3828)
  • Supply voltage supervision range: 2.5 V, 3 V, 3.3 V, 5 V
  • Watchdog timer (TPS3820, TPS3823, TPS3824, and TPS3828)
  • 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)


  • Signal Processing
  • Industrial
  • Automation & Process Control
  • Automotive
  • Portable Devices
  • Power Management
  • Wireless
  • Communications & Networking
  • Computers & Computer Peripherals


Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.25, 2.64, 2.93, 4.55
Features Manual reset capable, Reset time delay, Timeout watchdog, Undervoltage monitor only, Watchdog disable, Watchdog timer Reset threshold accuracy (%) 2, 2.2, 2.3, 2.4
Iq (typ) (mA) 0.015 Output driver type/reset output Active-low, Push-Pull
Time delay (ms) 200 Supply voltage (min) (V) 1.1
Supply voltage (max) (V) 5.5 Rating Catalog
Watchdog timer WDI (s) 1.6 Operating temperature range (°C) -40 to 125, -40 to 85
Manufacturer Texas Instruments Product Category Supervisory Circuits
RoHS Details Type Voltage Monitors
Mounting Style SMD/SMT Package / Case SOT-23-5
Threshold Voltage 2.93 V Number of Inputs Monitored 1 Input
Output Type Active Low, Push-Pull Manual Reset Manual Reset
Watchdog Timers Watchdog Battery Backup Switching No Backup
Reset Delay Time 200 ms Supply Voltage - Max 5.5 V
Minimum Operating Temperature - 40 C Maximum Operating Temperature + 85 C
Accuracy 2.4 % Series TPS3823-33
Brand Texas Instruments Chip Enable Signals No Chip Enable
Height 1.15 mm Length 2.9 mm
Operating Supply Current 15 uA Output Current 10 mA
Overvoltage Threshold 3 V Pd - Power Dissipation 437 mW
Power Fail Detection No Product Type Supervisory Circuits
Factory Pack Quantity 3000 Subcategory PMIC - Power Management ICs
Supply Voltage - Min 1.1 V Undervoltage Threshold 2.93 V
Width 1.6 mm Unit Weight 0.000222 oz

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Ratings and Reviews

L**s 03/31/2024

Amazingly quick. 9 days to The Netherlands. Thanks.

F**r 06/17/2022

Avaq's customer service truly stands out. They promptly addressed an issue I had with my order, demonstrating their commitment to customer satisfaction. Highly responsive and reliable!

J**n 06/01/2020

Thanks good product. works fine

J**a 03/25/2020

Package came, seller recommend



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Availability: 6240 PCS

Qty. Unit Price(USD) Ext. Price
5+ $0.243 $1.22
50+ $0.193 $9.65
150+ $0.168 $25.20
500+ $0.146 $73.00
3000+ $0.137 $411.00
6000+ $0.133 $798.00

The prices below are for reference only.