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Texas Instruments TPS3702AX33DDCT
- Part No.:
- TPS3702AX33DDCT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS3702AX33DDCT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:635
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Product details
Overview
TPS3702AX33DDCT from Texas Instruments is a high-accuracy window voltage detector IC designed for precision overvoltage and undervoltage monitoring of 3.3V nominal supply rails. It features ±0.25% typical threshold accuracy, 0.55% internal hysteresis, open-drain UV/OV outputs, and operates across 2V–18V VDD with –40°C to 125°C industrial temperature range. Used in FPGA power sequencing and safety-critical rail supervision.
For engineers reviewing the TPS3702AX33DDCT datasheet, TPS3702AX33DDCT pinout, TPS3702AX33DDCT application, or TPS3702AX33DDCT equivalent, this page delivers verified functional identity, confirmed SOT-6 package mapping, validated 6-pin terminal roles, exact threshold behavior at 3.3V, real-world timing specs (300µs startup delay, 19µs OV/UV propagation), and two rigorously confirmed alternative parts with documented differences.
Technical Context
The TPS3702AX33DDCT integrates dual precision comparators with an internal trimmed resistor divider and reference to form a fixed-window detector optimized for 3.3V rails. Its SET pin selects between two factory-trimmed accuracy bands-±4% nominal (tight) or ±9% nominal (wide)-with worst-case total accuracy of ±4.9% over temperature.
It uses separate SENSE and VDD pins to enable redundancy in safety-critical systems, supports independent pull-up voltages up to 18V on UV/OV outputs, and asserts active-low signals only when monitored voltage exits the hysteresis-bounded window. Internal glitch immunity and 7µA quiescent current support low-power industrial and embedded applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V to 18V on VDD; SENSE accepts up to 6.5V independent of VDD - enables flexible rail monitoring without level-shifting. |
| Threshold Accuracy | ±0.25% typical, ±0.9% over –40°C to 125°C - ensures reliable fault detection within tight 3.3V ±4.9% window under full industrial temp range. |
| Hysteresis | 0.55% of nominal trip point - prevents false resets during normal supply ripple or noise near threshold boundaries. |
| Quiescent Current | 7µA typical at VDD ≥ 5V - minimizes standby power impact in battery-backed or always-on systems. |
| Startup Delay | 300µs after VDD ≥ 2V - guarantees stable internal biasing before output assertion, critical for deterministic power-on reset timing. |
| Output Type | Open-drain UV and OV - allows wired-OR logic, independent pull-up to 18V, and interface compatibility with diverse logic families. |
| SET Pin Function | Configures ±4% (VSET ≥ 750mV) or ±9% (VSET ≤ 250mV) nominal window - enables dynamic accuracy adjustment during system startup or mode transitions. |
Pinout & Package
SOT-6 (DDC) package, 2.90mm × 1.60mm body size, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - UV | Active-low open-drain undervoltage output | Drives low when SENSE falls below VIT–(UV); requires external pull-up; sinks up to 10mA. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and output current; must be low-impedance connection. |
| 3 - SENSE | Monitored supply input | High-impedance analog input (1.5µA max leakage); accepts 0–6.5V; no external resistors needed for threshold setting. |
| 4 - SET | Accuracy band selection input | Digital control pin: VIH ≥ 750mV selects ±4% window; VIL ≤ 250mV selects ±9% window. |
| 5 - VDD | Device supply input | Power source for internal circuitry (2–18V); decoupling capacitor (0.1µF) required close to pin. |
| 6 - OV | Active-low open-drain overvoltage output | Drives low when SENSE exceeds VIT+(OV); electrically identical to UV; supports wired-OR with UV. |
Key Features
| Feature | Design Value |
|---|---|
| No external resistors required | Internal trimmed resistor divider eliminates component count, layout area, and resistor tolerance errors - improves overall system accuracy by removing external error sources. |
| Independent SENSE and VDD pins | Enables monitoring of one rail (e.g., 3.3V) while powering device from another (e.g., 5V or 12V) - supports redundant supervision architectures in functional safety designs. |
| Programmable accuracy band via SET pin | Allows runtime switching between ±4% and ±9% nominal windows - supports relaxed startup margins followed by tight operational monitoring without hardware change. |
| Glitch-immune comparator architecture | Rejects transients < 100ns duration - prevents spurious resets from ESD or switching noise on sensitive power rails. |
| Wide output pull-up voltage range | UV/OV outputs support pull-up to 18V regardless of VDD - simplifies interfacing to higher-voltage logic or legacy reset controllers. |
Applications
| FPGA Power Sequencing | DSP Core Voltage Supervision |
|---|---|
Use Scenario: Monitoring 3.3V I/O bank supply in Xilinx or Intel FPGAs during power-up, steady-state, and brownout conditions. IC Role / Device Role / Timing Role: Window voltage detector asserting active-low UV/OV signals to FPGA's PROGRAM_B or INIT_B pins for controlled reconfiguration. Use Value: ±0.9% threshold accuracy over temperature ensures reliable detection within 3.3V ±4.9% window, preventing premature or missed configuration resets. |
Use Scenario: Supervising 3.3V core supply in TI C6000 or Analog Devices SHARC DSPs where voltage excursions cause instruction corruption. IC Role / Device Role / Timing Role: Independent UV and OV outputs feed into DSP's nRST and nEN lines to halt execution before invalid data processing occurs. Use Value: 19µs OV propagation delay and 300µs startup delay guarantee sub-millisecond fault response aligned with DSP boot timing requirements. |
| Industrial PLC I/O Module Rail Monitoring | Motor Drive Gate Driver Bias Supply Watchdog |
Use Scenario: Continuous monitoring of isolated 3.3V logic supply in programmable logic controller backplane modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Dual open-drain outputs tied together via wired-OR to drive a single system-level fault latch that disables all I/O channels on violation. Use Value: 125°C qualification and 0.55% hysteresis prevent nuisance trips from thermal drift or load-induced ripple on long PCB traces. |
Use Scenario: Supervising auxiliary 3.3V bias rail feeding isolated gate drivers in servo motor inverters, where undervoltage causes shoot-through risk. IC Role / Device Role / Timing Role: UV output directly connected to gate driver enable pin to force safe shutdown within 19µs of rail collapse. Use Value: 7µA quiescent current avoids loading the low-current bias rail, and SENSE/VDD separation allows monitoring rail independent of driver supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar window voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBZR | Single-channel (UV-only), ±1% accuracy over temperature, no SET pin, SOT-23-3 package | Lacks overvoltage detection and programmable hysteresis; suitable only for basic undervoltage-only use cases | Select only if system requires UV-only supervision and board space is constrained - not a functional replacement for TPS3702AX33DDCT's dual-window capability. |
| MAX6816EUT+T | Single-supply window detector, ±1.5% accuracy, fixed 3.3V thresholds, no SET pin, SOT-23-6 package | Fixed thresholds only; no accuracy band selection; lower accuracy and no independent SENSE/VDD architecture | Choose when cost sensitivity outweighs need for programmability and precision - acceptable for non-safety-critical consumer applications where ±1.5% is sufficient. |
Compared with TLV809E33DBZR and MAX6816EUT+T, the TPS3702AX33DDCT uniquely delivers dual-window detection, ±0.9% accuracy over full industrial temperature, SET-pin programmability, and SENSE/VDD separation - making it the only option qualified for safety-redundant and high-precision 3.3V rail supervision.
Availability
TPS3702AX33DDCT is available at Aetrix Electronics and suitable for FPGA power sequencing, DSP core voltage supervision, and industrial PLC I/O module rail monitoring requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS3702AX33DDCT 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 communications markets.
The TPS3702 family is part of TI's precision voltage supervisor product line, engineered specifically for high-accuracy window monitoring in safety-critical and low-power embedded systems where supply rail integrity directly impacts system reliability.
FAQ
What is the exact overvoltage and undervoltage threshold for TPS3702AX33DDCT at 3.3V nominal rail?
The TPS3702AX33DDCT is factory-trimmed for 3.3V nominal operation. With SET pin high (≥750mV), its nominal overvoltage threshold is +4% (3.432V) and undervoltage threshold is –4% (3.168V), with ±0.9% accuracy over –40°C to 125°C resulting in worst-case bounds of 3.463V and 3.139V. These values are specified in the Electrical Characteristics table of the official TPS3702 datasheet (SBVS251A).
Does TPS3702AX33DDCT require external resistors to set its thresholds?
No, the TPS3702AX33DDCT does not require external resistors. It integrates a precision trimmed resistor divider and reference internally, eliminating external components and associated tolerance errors. This design reduces solution size, improves accuracy, and simplifies layout - confirmed in Section 3 (Description) and Figure 7-2 of the TPS3702 datasheet.
Can TPS3702AX33DDCT monitor a 3.3V rail while powered from a different supply voltage?
Yes. The TPS3702AX33DDCT has independent SENSE and VDD pins. SENSE accepts 0–6.5V (covering 3.3V rails), while VDD operates from 2V–18V. This allows monitoring a 3.3V rail using a separate 5V or 12V supply - a key feature for redundant supervision in safety-critical systems, explicitly described in Section 3 and Figure 7-4 of the datasheet.
What is the function of the SET pin on TPS3702AX33DDCT?
The SET pin configures the TPS3702AX33DDCT's accuracy band: applying ≥750mV selects a ±4% nominal window (tight), while ≤250mV selects ±9% (wide). This enables dynamic adjustment - e.g., relaxed startup margin followed by precise operational monitoring. Threshold accuracy remains ±0.9% over temperature in both modes, per Section 6.3.3 and Table 10-1 of the datasheet.
Is TPS3702AX33DDCT qualified for industrial temperature range operation?
Yes, the TPS3702AX33DDCT is fully qualified for operation from –40°C to +125°C ambient temperature. Its electrical characteristics, including ±0.9% threshold accuracy and 7µA quiescent current, are guaranteed across this range, as verified in Sections 5.3 (Recommended Operating Conditions) and 5.5 (Electrical Characteristics) of the SBVS251A datasheet.
TPS3702AX33DDCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS3702AX33DDCT FAQ
1.How can I place an order for TPS3702AX33DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3702AX33DDCT 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 TPS3702AX33DDCT reliable?
The price and inventory of TPS3702AX33DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3702AX33DDCT is usually 5 days.
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TPS3702AX33DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3702AX33DDCT 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 TPS3702AX33DDCT?
For technical support, including TPS3702AX33DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3702AX33DDCT requirements.
6.How does Aetrix verify that TPS3702AX33DDCT is sourced from the original manufacturer or authorized distributors?
All TPS3702AX33DDCT 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 TPS3702AX33DDCT meets industry standards.
7.What is the process for return or replacement of TPS3702AX33DDCT?
All TPS3702AX33DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3702AX33DDCT, 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 TPS3702AX33DDCT part is unused and in its original packaging.
Return procedure for TPS3702AX33DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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