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Texas Instruments TPS3125L30DBVT
- Part No.:
- TPS3125L30DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3125L30DBVT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,930
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Product details
Overview
TPS3125L30DBVT from Texas Instruments is an ultra-low-voltage processor supervisory IC with 2.64 V reset threshold, 180 ms power-on reset delay, manual reset (MR) input, and push-pull active-low RESET output in SOT-23-5 package. It monitors supply voltage for low-power DSPs and microcontrollers in battery-powered systems.
For engineers reviewing the TPS3125L30DBVT datasheet, TPS3125L30DBVT pinout, TPS3125L30DBVT application, or TPS3125L30DBVT equivalent, key selection criteria include precise 2.64 V threshold tolerance (±0.07 V), 14 µA typical supply current at 3.3 V, MR-triggered reset capability, and -40°C to 85°C industrial temperature operation.
Technical Context
The TPS3125L30DBVT integrates a precision internal voltage divider for fixed 2.64 V threshold detection, a 180 ms internal reset timer, and a manual reset input that forces active-low RESET regardless of VDD level. Its push-pull output drives loads directly without external pull-up.
It operates down to 0.75 V supply and supports watchdog-free supervision - unlike TPS3123/3124/3128 variants, the TPS3125 family excludes watchdog functionality per datasheet functional tables and block diagram labeling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage (VIT−) | 2.64 V (nominal), ±0.07 V over −40°C to 85°C - ensures reliable reset assertion at 3.0 V nominal supply systems |
| Power-On Reset Delay (td) | 180 ms (typical) - guarantees sufficient system stabilization time before release of RESET signal |
| Supply Current (IDD) | 14 µA (typical at 3.3 V) - enables multi-year battery life in always-on supervisory applications |
| Operating Voltage Range | 0.75 V to 3.3 V - supports ultralow-voltage logic domains including sub-1V core rails |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor and reduces BOM count |
| Manual Reset Input (MR) | Valid down to 0.75 V supply - allows system-initiated reset independent of VDD level |
| Temperature Range | −40°C to +85°C - qualified for industrial and portable equipment environments |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 1.6 mm × 1.15 mm body, gull-wing leads, tape-and-reel (250 pcs per reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | Accepts 0.75–3.3 V; powers internal reference, timer, and output stage |
| 2 - GND | Ground reference | Return path for all internal circuits; must be low-impedance connection |
| 3 - RESET | Active-low reset output | Push-pull driver; sinks up to 3 mA at 3.3 V; asserts low during fault or MR activation |
| 4 - MR | Manual reset input | Active-low; pulls RESET low when ≤0.3×VDD; internally pulled up with 27 kΩ resistor |
| 5 - WDI | Watchdog input | No function - TPS3125 devices omit watchdog circuitry; pin is NC (no connect) |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.64 V threshold with 30 mV hysteresis | Prevents oscillation during slow VDD ramp; stable reset release at 2.67 V |
| 180 ms reset timeout with no external components | Eliminates timing capacitor and associated layout sensitivity or drift |
| MR input with internal 27 kΩ pull-up | Reduces external component count; enables board-level reset button without pull-up resistor |
| Push-pull RESET output | Drives CMOS inputs directly; avoids weak pull-up limitations of open-drain alternatives |
| Ultra-low 14 µA supply current | Minimizes quiescent drain on coin-cell or energy-harvesting supplies |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless sensor node powered by a CR2032 coin cell must maintain reliable boot sequencing across temperature and aging-induced voltage droop. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset and manual reset trigger for ARM Cortex-M0+ MCU. Use Value: 2.64 V threshold matches 3.0 V nominal LiMnO₂ battery profile; 14 µA IDD extends operational lifetime beyond 5 years. |
Use Scenario: An isolated digital input module in a factory automation controller requires deterministic reset behavior after brownout events. IC Role / Device Role / Timing Role: System-level voltage supervisor asserting RESET to FPGA and interface ASIC during undervoltage conditions. Use Value: 180 ms fixed delay ensures full FPGA configuration completion; −40°C to 85°C rating supports uncontrolled cabinet environments. |
| Portable Medical Monitor | Edge AI Inference Edge Device |
Use Scenario: A handheld ECG monitor uses a low-noise analog front-end powered from a regulated 3.0 V rail; any supply glitch must trigger immediate system reset. IC Role / Device Role / Timing Role: Precision voltage supervisor monitoring the 3.0 V analog supply rail with tight 2.64 V threshold. Use Value: 30 mV hysteresis prevents chatter near threshold; push-pull output drives reset pin of medical-grade MCU without external components. |
Use Scenario: An edge inference device with dual-rail power (1.2 V core, 3.3 V I/O) requires coordinated reset assertion only on I/O rail failure. IC Role / Device Role / Timing Role: Dedicated supervisor for 3.3 V I/O domain, decoupled from core rail supervision. Use Value: Independent MR pin enables firmware-triggered safe shutdown; 0.75 V minimum operation supports deep-sleep wake-up integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3125L30DBVR | Same electrical specs and pinout; differs only in packaging - 3000-piece tape-and-reel vs. 250-piece tape-and-reel | Identical functional use; selected for high-volume automated assembly | Choose TPS3125L30DBVR for production runs >1k units; TPS3125L30DBVT preferred for prototyping and low-volume builds |
| TPS3808G33DBVR | Adjustable threshold via external resistor divider; 3.3 V fixed option available; 350 ms default delay; 2.5 µA quiescent current | Requires external resistor network; better suited for designs needing programmable thresholds or lower IDD | Select TPS3808G33DBVR only if threshold flexibility or sub-5 µA supply current is mandatory; otherwise TPS3125L30DBVT offers simpler, more cost-effective fixed-threshold solution |
Compared with TPS3125L30DBVR, the TPS3125L30DBVT provides identical supervision performance in smaller reel quantity; versus TPS3808G33DBVR, it trades adjustability and ultra-low IDD for zero-component simplicity and tighter 2.64 V threshold accuracy.
Availability
TPS3125L30DBVT is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC modules, and portable medical monitors requiring stable component supply with guaranteed long-term availability.
Supply support for TPS3125L30DBVT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TPS312x family was designed specifically for ultralow-voltage supervision of DSPs, microcontrollers, and microprocessors in space- and power-constrained portable and industrial systems.
FAQ
What is the exact reset threshold voltage of the TPS3125L30DBVT?
The TPS3125L30DBVT has a nominal reset threshold voltage (VIT−) of 2.64 V, with a guaranteed range of 2.57 V to 2.71 V over the full −40°C to +85°C operating temperature range. This value is laser-trimmed and fixed per device marking "L30", corresponding to 3.0 V nominal supply supervision with −12% tolerance (3.0 V × 0.88 = 2.64 V).
Does the TPS3125L30DBVT include a watchdog timer function?
No, the TPS3125L30DBVT does not include a watchdog timer. Per the TI SLVS227B datasheet functional tables and block diagram, watchdog functionality is exclusive to TPS3123, TPS3124, and TPS3128 variants. Pin 5 (WDI) on the TPS3125L30DBVT is a no-connect terminal and must be left unconnected or tied to GND/VDD with no functional impact.
What is the RESET output configuration of the TPS3125L30DBVT?
The TPS3125L30DBVT features a push-pull active-low RESET output (pin 3). It actively drives low during reset assertion and actively drives high when released - eliminating the need for an external pull-up resistor. This differs from open-drain variants like TPS3123 and enables direct interfacing with CMOS inputs without additional components.
Can the TPS3125L30DBVT operate from a 0.8 V supply?
Yes, the TPS3125L30DBVT can operate from as low as 0.75 V supply voltage (VDD), per absolute maximum and recommended operating conditions. At 0.8 V, it maintains valid reset assertion when VDD falls below 2.64 V, and its internal timer and MR input remain functional - enabling supervision in ultra-low-voltage subsystems such as energy-harvesting nodes.
What is the purpose of the MR pin on the TPS3125L30DBVT?
The MR (Manual Reset) pin (pin 4) on the TPS3125L30DBVT is an active-low input that forces the RESET output low regardless of VDD level or threshold condition. When pulled below 0.3×VDD, it immediately asserts reset - enabling hardware-initiated system reset via pushbutton, FPGA control, or system-level fault signal. An internal 27 kΩ pull-up resistor holds MR high when unconnected.
TPS3125L30DBVT 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:
- 2.64V
- 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
TPS3125L30DBVT FAQ
1.How can I place an order for TPS3125L30DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3125L30DBVT 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 TPS3125L30DBVT reliable?
The price and inventory of TPS3125L30DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3125L30DBVT is usually 5 days.
3.What payment methods are accepted for TPS3125L30DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3125L30DBVT transactions.
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4.How is shipping managed for TPS3125L30DBVT?
TPS3125L30DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3125L30DBVT 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 TPS3125L30DBVT?
For technical support, including TPS3125L30DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3125L30DBVT requirements.
6.How does Aetrix verify that TPS3125L30DBVT is sourced from the original manufacturer or authorized distributors?
All TPS3125L30DBVT 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 TPS3125L30DBVT meets industry standards.
7.What is the process for return or replacement of TPS3125L30DBVT?
All TPS3125L30DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3125L30DBVT, 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 TPS3125L30DBVT part is unused and in its original packaging.
Return procedure for TPS3125L30DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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