Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments TPS3124J18DBVR

Name: TPS3124J18DBVR
Brand: Texas Instruments
SKU: TPS3124J18DBVR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TPS3124J18DBVR

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: TPS3124J18DBVR.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,406

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TPS3124J18DBVR from Texas Instruments is an ultra-low-voltage processor supervisory IC with 1.62 V nominal reset threshold (V_IT–), 180 ms power-on reset delay, active-high push-pull RESET output, and integrated watchdog timer. It monitors 1.8 V rails in DSP and microprocessor systems, asserts RESET when V_DD drops below threshold, and re-triggers on WDI edge transitions to detect software hangs. Designed for battery-powered and always-on infrastructure.

For engineers reviewing the TPS3124J18DBVR datasheet, TPS3124J18DBVR pinout, TPS3124J18DBVR application, or TPS3124J18DBVR equivalent, key selection criteria include its 1.62 V threshold tolerance (±60 mV), 14 µA supply current at 0.9 V, watchdog timeout of 0.8–2.1 s, absence of manual reset (MR) input, and SOT-23-5 package compatibility with space-constrained embedded designs.

Technical Context

The TPS3124J18DBVR implements a fixed-threshold voltage supervisor with internal hysteresis (20 mV) and a digital watchdog timer that resets on rising or falling edges at WDI. Its active-high RESET output remains asserted low until V_DD exceeds V_IT+ = V_IT– + V_HYS, then holds high for 180 ms before deassertion.

Unlike TPS3123/3125 variants, it omits the MR pin but retains full watchdog functionality and uses push-pull output topology-enabling direct interface with enable inputs requiring active-high logic without external pull-ups. Operation is validated from 0.9 V to 3.3 V supply and –40°C to +85°C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold (V_IT–)	1.62 V (nominal), ±60 mV over temperature - sets precise 1.8 V rail monitoring point without external resistors
Reset Delay Time (t_d)	180 ms (fixed) - ensures stable power-up sequencing before processor release
Watchdog Timeout (t_tout)	0.8–2.1 s - detects firmware stalls in real-time systems without CPU intervention
Supply Current (I_DD)	14 µA at 0.9 V - enables multi-year operation in coin-cell–powered IoT endpoints
Operating Voltage Range	0.9 V to 3.3 V - supports ultra-low-voltage SoCs and legacy 1.8 V logic domains
Output Type	Active-high push-pull - drives high-impedance enable inputs directly; no external pull-up required
Temperature Range	–40°C to +85°C - qualified for industrial and communications infrastructure environments

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body, 0.95 mm max height), surface-mount, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1 - RESET	Active-high push-pull output	Drives logic-high during fault; sinks/source up to ±5 mA; asserts when V_DD < 1.62 V or WDI timeout occurs
2 - GND	Ground reference	Primary return path for internal circuitry and output stage; requires low-inductance connection to system ground plane
3 - RESET	Redundant active-high output terminal	Same signal as Pin 1; dual-pin layout accommodates PCB routing constraints in dense layouts
4 - WDI	Watchdog timer input	Edge-sensitive (rising/falling); must be toggled within 0.8–2.1 s to prevent reset; high-impedance when unused
5 - V_DD	Supply input	Accepts 0.9–3.3 V; requires 0.1 µF ceramic decoupling capacitor placed ≤2 mm from pin

Key Features

Feature	Design Value
Fixed 1.62 V threshold	Eliminates external resistor divider; maintains ±60 mV accuracy across –40°C to +85°C for reliable 1.8 V rail supervision
180 ms reset delay	Guarantees clean power stabilization before releasing processor reset, preventing boot failures in noisy power environments
Watchdog timer with edge-triggered WDI	Detects software lockups via pulse timing - no clock source or configuration registers needed; compatible with GPIO-toggled firmware
Active-high push-pull output	Directly interfaces with enable pins on PMICs, RF transceivers, or memory controllers without pull-up resistors or level shifters
Ultra-low 14 µA supply current	Extends battery life in portable medical sensors and remote telemetry nodes where duty-cycled wake-up dominates power budget

Applications

Industrial PLC I/O Module	Wireless Sensor Node
Use Scenario: Monitors 1.8 V FPGA configuration rail and 3.3 V radio supply in field-deployed programmable logic controllers. IC Role / Device Role / Timing Role: Supervises dual-rail power integrity and triggers hardware reset if either rail collapses or firmware fails to service watchdog. Use Value: Prevents spurious I/O state changes during brownout by holding FPGA in reset until both supplies stabilize and watchdog is cleared.	Use Scenario: Powers ultralow-power MCU and sub-GHz transceiver in battery-operated environmental sensor deployed for 5+ years. IC Role / Device Role / Timing Role: Provides cold-start reset and runtime watchdog supervision using same 1.8 V supply shared with MCU core. Use Value: Enables >10-year battery life via 14 µA quiescent current and eliminates field failures from firmware hangs without adding discrete logic.
Factory Automation Controller	Network Edge Gateway
Use Scenario: Embedded in motion-control drive board where deterministic boot and fail-safe shutdown are critical. IC Role / Device Role / Timing Role: Generates synchronized reset for ARM Cortex-M7 and FPGA fabric; asserts active-high RESET to disable gate drivers during fault. Use Value: Push-pull output drives gate driver EN pin directly, eliminating BOM cost and layout area of external pull-up resistor.	Use Scenario: Supervises dual-core application processor and Ethernet PHY in industrial gateway handling time-sensitive OPC UA traffic. IC Role / Device Role / Timing Role: Monitors 1.8 V core rail and services watchdog via periodic Linux kernel timer interrupt. Use Value: Detects OS-level freezes (e.g., driver deadlock) and forces hardware reset - recovering network connectivity without manual intervention.

Industrial PLC I/O Module

Wireless Sensor Node

Use Scenario: Monitors 1.8 V FPGA configuration rail and 3.3 V radio supply in field-deployed programmable logic controllers.

IC Role / Device Role / Timing Role: Supervises dual-rail power integrity and triggers hardware reset if either rail collapses or firmware fails to service watchdog.

Use Value: Prevents spurious I/O state changes during brownout by holding FPGA in reset until both supplies stabilize and watchdog is cleared.

Use Scenario: Powers ultralow-power MCU and sub-GHz transceiver in battery-operated environmental sensor deployed for 5+ years.

IC Role / Device Role / Timing Role: Provides cold-start reset and runtime watchdog supervision using same 1.8 V supply shared with MCU core.

Use Value: Enables >10-year battery life via 14 µA quiescent current and eliminates field failures from firmware hangs without adding discrete logic.

Factory Automation Controller

Network Edge Gateway

Use Scenario: Embedded in motion-control drive board where deterministic boot and fail-safe shutdown are critical.

IC Role / Device Role / Timing Role: Generates synchronized reset for ARM Cortex-M7 and FPGA fabric; asserts active-high RESET to disable gate drivers during fault.

Use Value: Push-pull output drives gate driver EN pin directly, eliminating BOM cost and layout area of external pull-up resistor.

Use Scenario: Supervises dual-core application processor and Ethernet PHY in industrial gateway handling time-sensitive OPC UA traffic.

IC Role / Device Role / Timing Role: Monitors 1.8 V core rail and services watchdog via periodic Linux kernel timer interrupt.

Use Value: Detects OS-level freezes (e.g., driver deadlock) and forces hardware reset - recovering network connectivity without manual intervention.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3124J12DBVR	1.08 V nominal reset threshold; identical pinout, watchdog, and output topology	Targets 1.2 V rails (e.g., advanced LPDDR4 I/O), not 1.8 V systems	Select only when supervising sub-1.5 V supplies; otherwise incompatible threshold
TPS3125J18DBVR	Includes manual reset (MR) input; same 1.62 V threshold and 180 ms delay	Required where external hardware reset (e.g., front-panel button) must override voltage supervision	Choose when system design mandates physical reset initiation independent of power or software state

Compared with TPS3124J18DBVR, TPS3124J12DBVR shifts threshold downward for lower-voltage domains, while TPS3125J18DBVR adds MR functionality at the cost of one dedicated pin - neither offers pin-to-pin replacement, and all require matching PCB layout to SOT-23-5 footprint.

Availability

TPS3124J18DBVR is available at Aetrix Electronics and suitable for industrial automation, wireless sensor networks, and network edge gateways requiring stable component supply across extended product lifecycles.

Supply support for TPS3124J18DBVR 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 leader delivering analog and embedded processing solutions, with over 50 years of innovation in power management, signal chain, and control technologies.

The TPS312x family targets ultra-low-voltage processor supervision in battery-powered and always-on systems, emphasizing minimal quiescent current, fixed-threshold accuracy, and integrated watchdog functionality for robust system initialization and runtime reliability.

FAQ

What is the exact reset threshold voltage of the TPS3124J18DBVR?

The TPS3124J18DBVR has a nominal negative-going input threshold voltage (V_IT–) of 1.62 V, with guaranteed minimum 1.56 V and maximum 1.68 V across –40°C to +85°C operating temperature. This 1.8 V rail-specific threshold is factory-programmed and requires no external components, enabling precise supervision without resistor dividers or calibration.

Does the TPS3124J18DBVR include a manual reset (MR) input?

No, the TPS3124J18DBVR does not include a manual reset (MR) input. Unlike TPS3123/3125/3126 variants, this device omits the MR pin to simplify layout and reduce pin count while retaining full watchdog timer functionality and active-high push-pull RESET output. System-level manual reset must be implemented externally if required.

What is the watchdog timeout range for the TPS3124J18DBVR?

The watchdog timeout (t_tout) for the TPS3124J18DBVR is specified from 0.8 s to 2.1 s at +25°C with 1 MΩ load and 50 pF capacitance. The timer resets on any rising or falling edge at the WDI pin; failure to toggle within this window asserts the active-high RESET output for the full 180 ms delay period, ensuring detection of firmware hangs in real-time systems.

Can the TPS3124J18DBVR operate below 1.0 V?

Yes, the TPS3124J18DBVR is fully functional down to 0.9 V supply voltage (V_DD), with guaranteed 14 µA supply current at that level. However, the RESET output is not valid below 0.9 V, and the internal reference requires V_DD ≥ 0.9 V to maintain threshold accuracy. It supports ultra-low-voltage SoCs and energy-harvesting systems where supply may dip near 0.9 V during transient loads.

What package type and dimensions does the TPS3124J18DBVR use?

The TPS3124J18DBVR uses a 5-pin SOT-23 (DBV) package with nominal body dimensions of 2.90 mm × 1.60 mm and maximum height of 0.95 mm. It features gull-wing leads, RoHS-compliant NIPDAU/SN lead finish, and moisture sensitivity level 1 (MSL-1), supporting standard 260°C peak reflow profiles without baking requirements.

TPS3124J18DBVR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 1.62V

Output:: Push-Pull, Totem Pole

Reset:: Active High/Active Low

Reset Timeout:: 100ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TPS3124J18DBVR FAQ

1.How can I place an order for TPS3124J18DBVR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3124J18DBVR 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 TPS3124J18DBVR reliable?

The price and inventory of TPS3124J18DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3124J18DBVR is usually 5 days.

3.What payment methods are accepted for TPS3124J18DBVR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3124J18DBVR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS3124J18DBVR?

TPS3124J18DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3124J18DBVR 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 TPS3124J18DBVR?

For technical support, including TPS3124J18DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3124J18DBVR requirements.

6.How does Aetrix verify that TPS3124J18DBVR is sourced from the original manufacturer or authorized distributors?

All TPS3124J18DBVR 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 TPS3124J18DBVR meets industry standards.

7.What is the process for return or replacement of TPS3124J18DBVR?

All TPS3124J18DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3124J18DBVR, 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 TPS3124J18DBVR part is unused and in its original packaging.

Return procedure for TPS3124J18DBVR:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…