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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Texas Instruments TPS3838J25DBVT

Name: TPS3838J25DBVT
Brand: Texas Instruments
SKU: TPS3838J25DBVT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3838J25DBVT

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: TPS3838J25DBVT.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

TPS3838J25DBVT from Texas Instruments is a nano-power voltage supervisor IC with open-drain active-low RESET output, 2.25 V threshold voltage (V_IT), 220 nA typical supply current, selectable 10 ms or 200 ms reset delay via CT pin, and operation across –40°C to 85°C - used for undervoltage monitoring in battery-powered microcontroller systems.

For engineers reviewing the TPS3838J25DBVT datasheet, TPS3838J25DBVT pinout, TPS3838J25DBVT application, or TPS3838J25DBVT equivalent, key selection criteria include its 2.25 V precision supervision threshold, open-drain output requiring external pullup, ultra-low quiescent current, manual reset capability, and compatibility with MSP430 and other low-power MCUs in portable equipment.

Technical Context

The TPS3838J25DBVT implements a precision bandgap-based voltage comparator with hysteresis (V_HYS = 40 mV) to detect VDD falling below 2.25 V and assert RESET after propagation delay t_PHL ≤ 10 µs. Its internal timer initiates after VDD rises above V_IT + V_HYS, with delay time set by CT pin connection: GND → 10 ms, VDD → 200 ms.

It features an active-low open-drain RESET output requiring external pullup resistor (value specified per operating voltage), manual reset input (MR) with ±200 µA leakage, and operates from 1.6 V to 6 V supply while consuming only 220 nA typical when VDD > V_IT and < 3 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.6 V to 6 V - supports single-cell Li-ion (3.6 V), alkaline, or coin-cell systems without external regulation.
Threshold Voltage (V_IT)	2.25 V (typical), ±1.5% over temperature - ensures reliable reset assertion at precise undervoltage point for 2.5 V rail monitoring.
Supply Current (I_DD)	220 nA (typical) at VDD < 3 V - enables multi-year battery life in always-on monitoring applications.
Reset Delay Options	10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing to meet system boot stability or brownout recovery requirements.
Output Type	Active-low open-drain - requires external pullup; allows wired-OR configuration and level translation to higher logic voltages.
Hysteresis (V_HYS)	40 mV (for V_IT > 2.5 V) - prevents oscillation during slow-rising/falling supply transitions near threshold.
Propagation Delay (t_PHL)	≤10 µs - ensures fast response to supply collapse, critical for protecting volatile MCU states.

Pinout & Package

TPS3838J25DBVT is housed in a 5-pin SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, with exposed pad not present. Pin 1 is VDD; pin 2 is GND; pin 3 is CT; pin 4 is MR; pin 5 is RESET. All pins are surface-mount compatible with standard reflow profiles (MSL Level-1).

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power input and monitored supply rail	Input voltage source; device supervises this node and asserts RESET when it falls below 2.25 V.
GND	Reference ground	Return path for all internal circuitry and external pullup resistor; must be low-impedance.
CT	Delay configuration control	Connect to GND for 10 ms delay or to VDD for 200 ms delay; no external capacitor required.
MR	Manual reset input	Active-low asynchronous reset trigger; logic low forces RESET assertion regardless of VDD level.
RESET	Open-drain active-low reset output	Drives low during fault; requires external pullup (e.g., 10–100 kΩ) to host logic voltage (e.g., 3.3 V).

Key Features

Feature	Design Value
Nano-power operation	220 nA typical I_DD enables >10-year battery life in coin-cell–powered IoT sensors.
Precision 2.25 V threshold	±1.5% tolerance over –40°C to 85°C ensures consistent reset behavior across industrial temperature range.
Selectably timed reset delay	Hardware-configurable 10 ms / 200 ms delay eliminates need for external RC timing components or firmware delays.
Open-drain RESET with manual reset	Supports flexible system-level reset coordination (e.g., multi-IC reset sequencing) and field-serviceable hard reset.
Low-voltage operation down to 1.6 V	Allows direct monitoring of partially discharged batteries or low-V_CC rails without auxiliary LDO.

Applications

Portable Medical Sensors	Wireless Sensor Nodes
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable shutdown before battery depletion. IC Role / Device Role / Timing Role: Monitors VDD and asserts open-drain RESET to halt MCU and analog front-end when voltage drops below 2.25 V. Use Value: Prevents data corruption and false readings during brownout by enforcing clean power-down with 200 ms delay ensuring stable cutoff.	Use Scenario: LoRaWAN environmental node with intermittent wake-up, operating on AA alkaline cells. IC Role / Device Role / Timing Role: Supervises main 3.0 V supply rail and triggers hardware reset if voltage sags due to RF transmit load. Use Value: Eliminates software watchdog dependency; 10 ms delay provides immediate recovery after transient dips without disrupting sensor sampling.
MSP430-Based Data Loggers	Industrial Handheld Terminals
Use Scenario: Battery-backed data logger using MSP430FR5969, storing critical measurements in FRAM. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection, interfacing directly with MSP430's RST/NMI pin. Use Value: Ensures deterministic initialization and prevents FRAM write errors during undervoltage by asserting RESET before VDD falls below 2.25 V.	Use Scenario: Ruggedized handheld terminal with 3.6 V Li-ion battery, used in warehouse scanning. IC Role / Device Role / Timing Role: Supervises main system rail and coordinates reset with PMIC and display controller via shared open-drain bus. Use Value: Enables synchronized multi-rail reset using wired-OR topology; 220 nA current draw extends runtime between charges.

Portable Medical Sensors

Wireless Sensor Nodes

Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable shutdown before battery depletion.

IC Role / Device Role / Timing Role: Monitors VDD and asserts open-drain RESET to halt MCU and analog front-end when voltage drops below 2.25 V.

Use Value: Prevents data corruption and false readings during brownout by enforcing clean power-down with 200 ms delay ensuring stable cutoff.

Use Scenario: LoRaWAN environmental node with intermittent wake-up, operating on AA alkaline cells.

IC Role / Device Role / Timing Role: Supervises main 3.0 V supply rail and triggers hardware reset if voltage sags due to RF transmit load.

Use Value: Eliminates software watchdog dependency; 10 ms delay provides immediate recovery after transient dips without disrupting sensor sampling.

MSP430-Based Data Loggers

Industrial Handheld Terminals

Use Scenario: Battery-backed data logger using MSP430FR5969, storing critical measurements in FRAM.

IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection, interfacing directly with MSP430's RST/NMI pin.

Use Value: Ensures deterministic initialization and prevents FRAM write errors during undervoltage by asserting RESET before VDD falls below 2.25 V.

Use Scenario: Ruggedized handheld terminal with 3.6 V Li-ion battery, used in warehouse scanning.

IC Role / Device Role / Timing Role: Supervises main system rail and coordinates reset with PMIC and display controller via shared open-drain bus.

Use Value: Enables synchronized multi-rail reset using wired-OR topology; 220 nA current draw extends runtime between charges.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3836J25DBVT	Push-pull active-low RESET output; no external pullup required; same 2.25 V threshold and 220 nA I_DD.	Eliminates pullup resistor but lacks wired-OR capability; better for simple single-IC reset.	Select when board space is constrained and no multi-device reset bus is needed.
MAX6375XR22+T	2.2 V threshold, 1.6 µA I_Q, fixed 200 ms delay, SOT23-5; no CT pin or manual reset.	Higher quiescent current limits battery life; no delay configurability or MR pin reduces system flexibility.	Choose only if TI part is unavailable and 1.6 µA I_Q remains acceptable for target runtime.

Compared with TPS3838J25DBVT, TPS3836J25DBVT simplifies BOM by removing the pullup resistor but sacrifices reset bus sharing; MAX6375XR22+T trades nano-power efficiency for broader vendor availability yet lacks design flexibility in delay and reset control.

Availability

TPS3838J25DBVT is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor nodes, MSP430-based data loggers, and industrial handheld terminals requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS3838J25DBVT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in low-power design and precision analog IP.

The TPS383x family was developed specifically for ultra-low-power voltage supervision in battery-critical applications such as wearables, IoT edge nodes, and energy-harvesting systems - emphasizing nanoscale current consumption and robust threshold accuracy.

FAQ

What is the exact reset threshold voltage of the TPS3838J25DBVT?

The TPS3838J25DBVT has a nominal threshold voltage (V_IT) of 2.25 V, with a guaranteed range of 2.18 V to 2.29 V over –40°C to 85°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVS292F datasheet. The "J25" suffix explicitly denotes the 2.25 V variant within the TPS383x family.

Does the TPS3838J25DBVT require an external pullup resistor on the RESET pin?

Yes, the TPS3838J25DBVT features an open-drain active-low RESET output and requires an external pullup resistor. The Recommended Operating Conditions specify a 50 µA pullup current, corresponding to ~68 kΩ at 3.3 V or ~33 kΩ at 1.8 V. Omitting the pullup will prevent the RESET signal from reaching valid logic-high levels.

How is the reset delay time configured on the TPS3838J25DBVT?

The reset delay time on the TPS3838J25DBVT is selected via the CT pin: connect CT to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. No external capacitor is needed. This hardware-selectable timing eliminates firmware dependencies and ensures deterministic reset behavior independent of MCU state.

Can the TPS3838J25DBVT monitor supply voltages below 1.8 V?

No - the TPS3838J25DBVT is specified for operation with VDD ≥ 1.6 V, but its 2.25 V threshold means it cannot supervise rails below that value. For sub-1.8 V monitoring, consider the TPS383xE18 (1.71 V threshold) variant. The J25 designation fixes the trip point at 2.25 V; it does not scale with supply voltage.

What is the maximum supply voltage the TPS3838J25DBVT can tolerate?

The TPS3838J25DBVT has an absolute maximum VDD rating of 7 V, but its recommended operating range is 1.6 V to 6 V. Exceeding 6 V risks violating Recommended Operating Conditions and may accelerate parametric drift or reduce reliability. Transient spikes above 7 V can cause permanent damage per Absolute Maximum Ratings.

TPS3838J25DBVT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.25V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 10ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TPS3838J25DBVT FAQ

1.How can I place an order for TPS3838J25DBVT through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3838J25DBVT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TPS3838J25DBVT reliable?

The price and inventory of TPS3838J25DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3838J25DBVT is usually 5 days.

3.What payment methods are accepted for TPS3838J25DBVT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3838J25DBVT transactions.

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4.How is shipping managed for TPS3838J25DBVT?

TPS3838J25DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3838J25DBVT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TPS3838J25DBVT?

For technical support, including TPS3838J25DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3838J25DBVT requirements.

6.How does Aetrix verify that TPS3838J25DBVT is sourced from the original manufacturer or authorized distributors?

All TPS3838J25DBVT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS3838J25DBVT meets industry standards.

7.What is the process for return or replacement of TPS3838J25DBVT?

All TPS3838J25DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3838J25DBVT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TPS3838J25DBVT part is unused and in its original packaging.

Return procedure for TPS3838J25DBVT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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