Texas Instruments TPS3702CX33DDCR

Overview

TPS3702CX33DDCR from Texas Instruments is a high-accuracy window voltage detector IC designed for monitoring 3.3V nominal supply rails. It provides independent open-drain overvoltage (OV) and undervoltage (UV) outputs with ±0.25% typical threshold accuracy, 0.55% internal hysteresis, and operates across a 2V–18V supply range. Used in FPGA power sequencing and safety-critical industrial controllers to prevent system malfunction from rail excursions.

For engineers reviewing the TPS3702CX33DDCR datasheet, TPS3702CX33DDCR pinout, TPS3702CX33DDCR application, or TPS3702CX33DDCR equivalent, key selection criteria include its fixed ±4% nominal window (configurable via SET pin), –40°C to 125°C industrial temperature rating, 7µA quiescent current, SOT-6 package footprint, and dual active-low fault signaling capability.

Technical Context

The TPS3702CX33DDCR integrates two precision comparators and a trimmed internal resistor divider to form a window detector without external components. Its SENSE input accepts up to 6.5V independent of VDD, enabling rail monitoring across mixed-voltage systems.

It features user-selectable accuracy bands via the SET pin: VIH(SET) ≥ 750mV selects ±4% nominal thresholds (±4.9% worst-case including 0.9% temp drift), while VIL(SET) ≤ 250mV selects ±9% nominal thresholds. Outputs assert low on excursion and enter high-impedance state upon return within hysteresis band.

Key Specifications

Pinout & Package

SOT-6 (DDC) package, 2.90mm × 1.60mm body size, surface-mount, moisture-sensitive level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809E33DBVR and MAX6816EUT+T, the TPS3702CX33DDCR uniquely delivers dual independent fault outputs, user-selectable accuracy bands, and full industrial temperature support - making it the only option for safety-critical 3.3V rail supervision requiring both OV and UV detection with configurable margins.

Availability

TPS3702CX33DDCR is available at Aetrix Electronics and suitable for FPGA power sequencing, industrial PLC I/O modules, motor drive gate driver bias supplies, and building automation controllers requiring stable component supply across extended temperature and long production lifecycles.

Supply support for TPS3702CX33DDCR 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 precision analog ICs and industrial-grade power management solutions.

The TPS3702 family is engineered for high-reliability power-rail supervision in safety-critical systems, delivering accurate window detection without external components for FPGA, ASIC, and industrial controller applications.

FAQ

What is the nominal voltage window setting for TPS3702CX33DDCR?

The TPS3702CX33DDCR is factory-configured for 3.3V nominal rails. With SET pin high (≥750mV), it implements a ±4% window: undervoltage threshold at 3.168V and overvoltage threshold at 3.432V, before hysteresis. These values shift with temperature per ±0.9% total accuracy spec over –40°C to 125°C.

Can TPS3702CX33DDCR monitor a voltage higher than its VDD supply?

Yes. The SENSE pin accepts up to 6.5V regardless of VDD value, which may be as low as 2V. This allows TPS3702CX33DDCR to supervise higher-voltage rails (e.g., 5V or 12V) using an external resistor divider while powered from a lower auxiliary rail - a key capability confirmed in TI's SBVS251A datasheet Section 6.3.1.

How does the SET pin affect TPS3702CX33DDCR's accuracy bands?

The SET pin selects between two nominal window widths: ≥750mV configures ±4% (tighter), ≤250mV configures ±9% (wider). For TPS3702CX33DDCR, this yields worst-case windows of ±4.9% and ±9.9%, respectively, combining nominal band and ±0.9% temperature drift. This enables dynamic margin adjustment during system startup or fault recovery.

What is the maximum sink current capability of TPS3702CX33DDCR's UV and OV outputs?

Both UV and OV outputs can sink up to 10mA each, as specified in the Absolute Maximum Ratings table (Section 5.1) and Recommended Operating Conditions (Section 5.3). This allows direct interfacing with standard logic inputs, optocouplers, or small-signal MOSFET gates without additional buffering - verified across the full –40°C to 125°C range.

Does TPS3702CX33DDCR require external components for basic operation?

No. TPS3702CX33DDCR requires only a 0.1µF ceramic decoupling capacitor on VDD and external pull-up resistors on UV/OV (2.2kΩ–10MΩ, per Section 5.3). All threshold-setting resistors are internal and trimmed, eliminating external dividers and their associated tolerance, temperature drift, and layout sensitivity - a core differentiator confirmed in Section 3 and Figure 7-2.