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Texas Instruments TPS3124J12DBVR
- Part No.:
- TPS3124J12DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3124J12DBVR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,482
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Product details
Overview
TPS3124J12DBVR from Texas Instruments is an ultra-low-voltage processor supervisory IC with 1.08 V nominal reset threshold, 180 ms power-on reset delay, active-high push-pull RESET output, and integrated watchdog timer. It monitors 1.2 V supply rails in DSP and microprocessor systems, asserting RESET when VDD falls below VIT−, and re-triggers on missing WDI pulses to detect software hangs. Designed for battery-powered and always-on infrastructure applications.
For engineers reviewing the TPS3124J12DBVR datasheet, TPS3124J12DBVR pinout, TPS3124J12DBVR application, or TPS3124J12DBVR equivalent, key selection criteria include its 1.08 V threshold accuracy (±40 mV), 14 µA typical supply current at 0.9 V, watchdog timeout of 0.8–2.1 s, SOT-23-5 package compatibility, and absence of manual reset input-critical for compact, low-power embedded reset supervision.
Technical Context
The TPS3124J12DBVR implements a fixed-threshold voltage supervisor with internal hysteresis (15 mV for 1.08 V VIT−) and a watchdog timer that triggers RESET upon missing edge transitions at WDI within 0.8–2.1 s. Its active-high RESET output remains asserted for 100–260 ms after VDD rises above VIT+ = VIT− + VHYS.
This device belongs to the TPS312x family optimized for sub-1.5 V rail monitoring and integrates timing supervision without external components. Unlike TPS3123/3125 variants, it omits MR input but retains WDI functionality and push-pull active-high RESET-enabling direct interface with enable pins requiring high-level assertion during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 1.08 V (nominal), ±40 mV over –40°C to +85°C - ensures reliable detection of 1.2 V rail collapse with built-in margin |
| Power-On Reset Delay | 180 ms (nominal), 100–260 ms range - provides sufficient time for power stabilization before system release |
| Watchdog Timeout | 0.8–2.1 s - detects firmware lockup in real-time systems without requiring host CPU intervention |
| Supply Current | 14 µA (typical) at 0.9 V - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 0.9 V to 3.3 V - supports ultra-low-voltage logic domains and brownout resilience down to near-threshold operation |
| Output Type | Active-high push-pull RESET - drives high-impedance enable inputs directly without pull-up resistors |
| Package | SOT-23-5 (2.90 mm × 1.60 mm) - compatible with high-density PCB layouts and automated assembly |
Pinout & Package
The TPS3124J12DBVR is housed in a 5-pin SOT-23 (DBV) package with 2.90 mm × 1.60 mm body size, rated for –40°C to +85°C operation and RoHS-compliant NIPDAU/SN lead finish (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-high push-pull output | Drives high during fault; asserts for ≥100 ms after VDD recovery - interfaces directly with processor EN or PMIC ENABLE |
| 2: GND | Ground reference | Low-impedance return path for internal comparators and timer; requires local 0.1 µF ceramic decoupling |
| 3: VDD | Supply input | Monitored rail input (0.9–3.3 V); RESET validity begins only above 0.9 V - no output guaranteed below this |
| 4: WDI | Watchdog input | Edge-sensitive trigger (rising/falling); timeout occurs if no transition exceeds 2.1 s - prevents false resets from noise |
| 5: NC | No connect | Unbonded pad; must remain floating - not usable as thermal pad or auxiliary terminal |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low minimum supply voltage | 0.9 V operation enables use with energy-harvesting and single-cell Li-ion systems where rail collapse starts near 1 V |
| Fixed 1.08 V reset threshold | Factory-trimmed VIT− eliminates external resistor dividers - reduces BOM count and layout area in space-constrained designs |
| Integrated watchdog timer | Self-contained pulse monitoring (WDI) with 0.8–2.1 s timeout - replaces discrete RC timers and reduces firmware watchdog overhead |
| Active-high push-pull RESET | Direct drive capability avoids external pull-up resistors and leakage-induced false releases in high-impedance enable paths |
| 15 mV hysteresis | Prevents oscillatory RESET assertion near threshold due to noise or slow-rising VDD - improves immunity in noisy industrial environments |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC Communication Module |
|---|---|
|
Use Scenario: Long-life remote sensor node powered by CR2032 coin cell, performing periodic BLE transmissions and deep-sleep cycles. IC Role / Device Role / Timing Role: Supervises 1.2 V LDO output feeding MCU and radio; asserts active-high RESET during brownout or firmware hang detected via WDI. Use Value: 14 µA quiescent current extends battery life beyond 5 years; 180 ms delay ensures stable wake-up; watchdog prevents silent data loss during RF stack lockup. |
Use Scenario: DIN-rail mounted Modbus RTU gateway with dual isolated power supplies and real-time Ethernet interface. IC Role / Device Role / Timing Role: Monitors primary 1.2 V logic rail supplying ARM Cortex-M7 core; generates clean reset pulse and watches for application processor freeze. Use Value: 1.08 V threshold matches 1.2 V rail tolerance; push-pull RESET drives FPGA configuration enable without external components; -40°C to +85°C rating ensures field reliability. |
| Wireless Baseband Processor Subsystem | Factory Automation Edge Controller |
|
Use Scenario: LTE Cat-M1 modem subsystem in smart meter, integrating DSP, RF transceiver, and secure boot ROM. IC Role / Device Role / Timing Role: Provides power-on reset and runtime watchdog supervision for baseband processor; RESET signal gates clock distribution and memory initialization. Use Value: Active-high RESET aligns with processor's active-high reset requirement; 0.9 V min VDD allows operation during cold-start under weak battery conditions. |
Use Scenario: Compact edge controller managing servo drives, I/O expansion, and OPC UA server in robotic cell. IC Role / Device Role / Timing Role: Supervises 1.2 V FPGA configuration rail and watchdogs real-time motion control firmware loop via WDI edge detection. Use Value: Fixed 180 ms delay synchronizes with FPGA bitstream load time; 15 mV hysteresis rejects EMI-induced glitches on factory floor power lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3123J12DBVR | Active-low RESET output, includes MR input, same 1.08 V threshold and 180 ms delay | Requires external pull-up for active-high logic; MR enables hardware-initiated reset independent of VDD | Select when system design mandates manual reset capability or uses active-low enable signals |
| TPS3808G12DBVR | Adjustable threshold (via external resistor), 200 ms delay, 2.5 µA IQ, no watchdog | Lacks WDI functionality; threshold programmability adds BOM and layout complexity | Select when precise threshold tuning is required and watchdog is unnecessary or handled in firmware |
Compared with TPS3123J12DBVR, the TPS3124J12DBVR trades manual reset for active-high output and simplified enable interfacing; versus TPS3808G12DBVR, it offers integrated watchdog and lower threshold tolerance at the cost of fixed VIT−-making it optimal for cost-sensitive, space-constrained 1.2 V systems needing autonomous hang detection.
Availability
TPS3124J12DBVR is available at Aetrix Electronics and suitable for battery-powered IoT nodes, industrial communication modules, wireless baseband subsystems, and factory automation controllers requiring stable component supply across extended product lifecycles.
Supply support for TPS3124J12DBVR 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.
The TPS312x family was designed specifically for ultra-low-voltage processor supervision in DSP and microcontroller systems, emphasizing minimal quiescent current, fixed-threshold accuracy, and integrated watchdog functionality without external components.
FAQ
What is the exact reset threshold voltage of the TPS3124J12DBVR?
The TPS3124J12DBVR has a nominal reset threshold voltage (VIT−) of 1.08 V, with a guaranteed range of 1.04 V to 1.12 V over the full –40°C to +85°C operating temperature range. This value is factory-trimmed and applies specifically to the J12 variant, matching the 1.2 V supply rail with 10% hysteresis margin. The TPS3124J12DBVR does not require external resistors to set this threshold.
Does the TPS3124J12DBVR include a manual reset (MR) input?
No, the TPS3124J12DBVR does not include a manual reset (MR) input. Per the device naming nomenclature and functional comparison table in the datasheet, only TPS3123/3125/3126/3128 variants feature MR. The TPS3124J12DBVR instead provides active-high RESET and watchdog timer (WDI) functionality in a 5-pin SOT-23 package, omitting MR to simplify the pinout and reduce die area.
What is the watchdog timeout behavior of the TPS3124J12DBVR?
When enabled, the TPS3124J12DBVR watchdog timer asserts the active-high RESET output if no rising or falling edge is detected on the WDI pin for longer than the timeout period, which ranges from 0.8 s to 2.1 s depending on process and temperature. Each valid edge clears the timer; RESET remains asserted for the full 100–260 ms delay period. The TPS3124J12DBVR watchdog operates independently of VDD monitoring and requires no external components.
Can the TPS3124J12DBVR operate below 1.2 V?
Yes, the TPS3124J12DBVR is specified to operate down to 0.9 V supply voltage (VDD), with functional RESET output guaranteed only above this level. Its 1.08 V threshold remains valid across the full 0.9–3.3 V range, enabling supervision of deeply scaled logic rails and brownout detection during battery discharge. Below 0.9 V, RESET behavior is undefined per absolute maximum ratings.
What package and environmental rating does the TPS3124J12DBVR have?
The TPS3124J12DBVR is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm, with RoHS-compliant NIPDAU/SN lead finish and MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH). It is characterized for continuous operation from –40°C to +85°C ambient temperature and supports standard reflow profiles up to 260°C peak.
TPS3124J12DBVR 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:
- 1.08V
- 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
TPS3124J12DBVR FAQ
1.How can I place an order for TPS3124J12DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3124J12DBVR 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 TPS3124J12DBVR reliable?
The price and inventory of TPS3124J12DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3124J12DBVR is usually 5 days.
3.What payment methods are accepted for TPS3124J12DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3124J12DBVR transactions.
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4.How is shipping managed for TPS3124J12DBVR?
TPS3124J12DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3124J12DBVR 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 TPS3124J12DBVR?
For technical support, including TPS3124J12DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3124J12DBVR requirements.
6.How does Aetrix verify that TPS3124J12DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3124J12DBVR 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 TPS3124J12DBVR meets industry standards.
7.What is the process for return or replacement of TPS3124J12DBVR?
All TPS3124J12DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3124J12DBVR, 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 TPS3124J12DBVR part is unused and in its original packaging.
Return procedure for TPS3124J12DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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