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Texas Instruments TPS3839G12DQNR
- Part No.:
- TPS3839G12DQNR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
TPS3839G12DQNR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 4X2SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,579
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Product details
Overview
TPS3839G12DQNR from Texas Instruments is an ultralow-power voltage supervisor IC designed for single-rail supply monitoring in battery-critical systems. It features a factory-trimmed 1.1 V reset threshold, 150 nA typical supply current at 25°C, push-pull RESET output, and valid operation down to 0.6 V VDD - enabling reliable power-on reset in sub-1.2 V alkaline or Li-ion single-cell applications.
For engineers reviewing the TPS3839G12DQNR datasheet, TPS3839G12DQNR pinout, TPS3839G12DQNR application, or TPS3839G12DQNR equivalent, this device is selected for ultra-low-quiescent-current system supervision where supply voltage stability, temperature-invariant threshold accuracy (±1% at 25°C), and transient immunity are essential design requirements.
Technical Context
The TPS3839G12DQNR implements a precision comparator-based supervision architecture with built-in hysteresis (11 mV typical) to prevent chatter during threshold crossing. Its sampling-based sensing scheme draws only ~15 µA for ~200 µs per measurement cycle, sustaining average current at 150 nA while maintaining accurate VDD monitoring across –40°C to +85°C.
Unlike manual-reset variants (e.g., TPS3831), the TPS3839G12DQNR omits the MR pin and uses a 3-pin SOT-23 (DBZ) package - simplifying layout and reducing BOM count in space-constrained portable designs where external reset initiation is unnecessary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 1.1 V (factory-trimmed, ±1% accuracy at 25°C); ensures precise brownout detection for 1.2 V logic rails |
| Supply Current (IDD) | 150 nA typical at 25°C; enables >10-year battery life in coin-cell-powered wearables and meters |
| Operating Voltage Range | 0.9 V to 6.5 V; supports direct monitoring of single alkaline (0.9–1.7 V), Li-ion (2.5–4.2 V), or 3.3/5 V rails |
| Valid Reset Output Down To | 0.6 V VDD; guarantees defined RESET state during deep discharge or cold-start conditions |
| RESET Delay Time (td) | 200 ms typical; provides sufficient de-bounce time for power rail stabilization after recovery |
| Hysteresis Voltage (Vhys) | 11 mV typical; prevents oscillation during slow-rising or noisy supply transitions |
| Output Type | Push-pull active-low RESET; eliminates need for external pull-up resistor and reduces standby leakage |
Pinout & Package
TPS3839G12DQNR is housed in a 3-pin SOT-23 (DBZ) package measuring 2.92 mm × 2.37 mm, optimized for high-density PCB layouts in portable electronics. The package has no thermal pad and requires standard reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power input | Supplies internal circuitry; accepts 0.9–6.5 V; must be bypassed with 0.1 µF capacitor near pin to suppress sampling-induced droop |
| GND | Ground reference | Return path for internal current; connects directly to system ground plane for noise immunity |
| RESET | Active-low reset output | Push-pull driver capable of sinking 2 mA; asserts low when VDD < 1.1 V and holds for 200 ms post-recovery |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 150 nA typical enables multi-year operation on CR2032 coin cells in glucose monitors and wearables |
| Factory-trimmed threshold | 1.1 V ±1% eliminates external resistor networks and calibration overhead in production |
| Transient rejection | Immune to fast VDD transients ≥20 µs duration and ≥5% amplitude below VIT–, improving system robustness |
| Wide temperature range | Specified from –40°C to +85°C; maintains threshold accuracy and delay timing across industrial environments |
| Push-pull output | Drives microcontroller reset pins directly without external pull-up, reducing component count and board area |
Applications
| Portable Medical Devices | Smart Meters |
|---|---|
Use Scenario: Glucose monitor powered by single alkaline cell with discharge profile from 1.5 V to 0.9 V. IC Role / Device Role / Timing Role: Monitors VDD and asserts RESET when voltage falls below 1.1 V to halt measurement and preserve residual battery energy. Use Value: 150 nA current draw extends usable battery life beyond 2 years; 0.6 V valid reset ensures deterministic shutdown even at end-of-life voltage. |
Use Scenario: Battery-backed AMI smart meter requiring tamper-proof power-fail detection and secure firmware initialization. IC Role / Device Role / Timing Role: Supervises backup lithium coin cell (3 V) and triggers controlled MCU reset before voltage drops below safe operating level. Use Value: Factory-trimmed 1.1 V threshold provides consistent trip point across production lots; 200 ms delay prevents false resets during brief grid interruptions. |
| Wearable Electronics | Industrial Sensors |
Use Scenario: Ultra-thin fitness tracker using single 1.2 V NiMH cell with tight voltage margin between operation and cutoff. IC Role / Device Role / Timing Role: Acts as primary POR circuit, asserting RESET until VDD stabilizes above 1.1 V during cold start or wake-from-hibernate. Use Value: Push-pull output drives ARM Cortex-M0+ reset pin directly; eliminates pull-up resistor and saves 0.5 mm² PCB area in 3.2 mm × 3.2 mm module. |
Use Scenario: Wireless temperature sensor node deployed in unheated outdoor enclosures (-25°C to +70°C ambient). IC Role / Device Role / Timing Role: Supervises 3.3 V LDO output powering RF SoC and analog front-end; initiates clean restart after brownout. Use Value: ±1% threshold accuracy over temperature ensures consistent reset behavior across full operating range; 11 mV hysteresis prevents chatter on noisy 24 V DC-DC-derived rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3831G12DQNR | 4-pin X2SON package with MR input; identical 1.1 V threshold and 150 nA current | Supports externally triggered reset via MR pin; requires additional PCB routing and pull-up if unused | Select when system-level reset coordination (e.g., watchdog timeout or button press) is required alongside VDD supervision |
| MAX6371XR29+T | 2.93 V fixed threshold; 0.8 µA supply current; SOT23-3 package; ±2% threshold accuracy | Higher current draw limits use in multi-year battery applications; suited for 3.3 V systems only | Select for cost-sensitive 3.3 V industrial controls where 150 nA is not mandatory and 2.93 V trip point matches rail tolerance |
Compared with TPS3839G12DQNR, TPS3831G12DQNR adds manual reset capability at the cost of one extra pin and layout complexity, while MAX6371XR29+T trades ultralow power for broader vendor availability and higher threshold accuracy tolerance - making TPS3839G12DQNR optimal for space- and energy-constrained 1.2 V systems.
Availability
TPS3839G12DQNR is available at Aetrix Electronics and suitable for portable medical devices, smart meters, wearable electronics, and industrial sensors requiring stable component supply across long product lifecycles and global manufacturing sites.
Supply support for TPS3839G12DQNR 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 specializing in analog and embedded processing technologies, with leadership in low-power design and precision analog signal chains.
The TPS383x family was developed specifically for ultralow-power voltage supervision in battery-operated equipment, targeting applications where nanoscale current budgets and sub-1.2 V operation define system viability.
FAQ
What is the exact reset threshold voltage of the TPS3839G12DQNR?
The TPS3839G12DQNR has a factory-trimmed negative-going threshold voltage (VIT–) of 1.1 V, with ±1% accuracy at 25°C and guaranteed performance across –40°C to +85°C. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet and applies specifically to the G12 variant - distinct from other members of the TPS383x family such as G25 (2.325 V) or K33 (2.93 V).
Does the TPS3839G12DQNR support manual reset functionality?
No, the TPS3839G12DQNR does not include a manual reset (MR) input. It is a 3-pin SOT-23 device with only VDD, GND, and RESET terminals. Manual reset capability is exclusive to the TPS3831 series (e.g., TPS3831G12DQNR), which uses a 4-pin X2SON package and dedicates Pin 2 to the MR function.
Can the TPS3839G12DQNR operate reliably below 1.0 V?
Yes - the TPS3839G12DQNR guarantees valid RESET output behavior down to 0.6 V VDD, and its recommended operating range starts at 0.9 V. This allows it to supervise deeply discharged alkaline cells or low-voltage energy harvesting sources where rail collapse occurs gradually below nominal voltage.
What is the purpose of the 0.1 µF capacitor recommended near the VDD pin of the TPS3839G12DQNR?
The 0.1 µF capacitor mitigates voltage droop caused by the TPS3839G12DQNR's periodic 15 µA sampling current (~200 µs duration). Without it, high-impedance supply paths (e.g., long PCB traces or RC-filtered inputs) may induce false resets due to momentary VDD sag during sampling - a documented design requirement in Section 9.2.2.1 of the SBVS193D datasheet.
Is the TPS3839G12DQNR pin-compatible with other TPS383x variants in SOT-23 packaging?
Yes - all TPS3839 variants in SOT-23-3 (DBZ) packaging, including TPS3839A09, TPS3839G12, TPS3839G25, and TPS3839K33, share identical pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = VDD. This allows drop-in replacement across threshold voltages without PCB redesign, provided system-level timing and accuracy requirements are met.
TPS3839G12DQNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.1V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-X2SON (1x1)
TPS3839G12DQNR FAQ
1.How can I place an order for TPS3839G12DQNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3839G12DQNR 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 TPS3839G12DQNR reliable?
The price and inventory of TPS3839G12DQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3839G12DQNR is usually 5 days.
3.What payment methods are accepted for TPS3839G12DQNR?
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4.How is shipping managed for TPS3839G12DQNR?
TPS3839G12DQNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3839G12DQNR 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 TPS3839G12DQNR?
For technical support, including TPS3839G12DQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3839G12DQNR requirements.
6.How does Aetrix verify that TPS3839G12DQNR is sourced from the original manufacturer or authorized distributors?
All TPS3839G12DQNR 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 TPS3839G12DQNR meets industry standards.
7.What is the process for return or replacement of TPS3839G12DQNR?
All TPS3839G12DQNR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3839G12DQNR, 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 TPS3839G12DQNR part is unused and in its original packaging.
Return procedure for TPS3839G12DQNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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