Texas Instruments TPS3702CX12DDCT

Overview

TPS3702CX12DDCT from Texas Instruments is a high-accuracy window voltage detector IC designed for monitoring 1.2V nominal supply rails in safety-critical systems. It delivers ±0.25% typical threshold accuracy, 0.55% internal hysteresis, 7µA typical quiescent current, and operates across –40°C to 125°C. It is used in FPGA power sequencing to assert independent open-drain UV/OV reset signals when rail voltage deviates beyond ±4.94% (worst-case).

For engineers reviewing the TPS3702CX12DDCT datasheet, TPS3702CX12DDCT pinout, TPS3702CX12DDCT application, or TPS3702CX12DDCT equivalent, this page provides verified functional context, validated pin roles, confirmed temperature-stable accuracy data, and real-world implementation constraints - including SET-pin-configurable ±4%/±9% nominal windows, SENSE input up to 6.5V, and VDD operation from 2V to 18V.

Technical Context

The TPS3702CX12DDCT integrates two precision comparators with an internal trimmed resistor divider and reference to form a fixed-window detector optimized for 1.2V rails. Its dual open-drain outputs (UV/OV) operate independently and support wired-OR logic, enabling fault isolation without external components.

It features user-selectable accuracy bands via the SET pin: high-level input configures ±4% nominal thresholds (±4.94% worst-case over temperature), while low-level input selects ±9% (±9.9% worst-case). Internal glitch immunity and 300µs startup delay ensure robustness against transient noise during power-up sequences.

Key Specifications

Pinout & Package

SOT-6 (DDC) package, 2.90mm × 1.60mm body size, surface-mount, thermally enhanced for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3702CX12DDCT, TPS3702CX18DDCT offers identical architecture and accuracy but targets 1.8V rails, while TLV809E12DBZR sacrifices window detection and precision for lower cost and simpler integration - making it unsuitable for applications requiring coordinated UV/OV fault reporting.

Availability

TPS3702CX12DDCT is available at Aetrix Electronics and suitable for FPGA power sequencing, DSP core supervision, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and guaranteed traceability.

Supply support for TPS3702CX12DDCT 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 reliability.

The TPS3702 family is designed for high-reliability power-supply monitoring in safety-critical systems - delivering accurate, configurable window detection without external resistors for FPGA, ASIC, and motor control applications.

FAQ

What is the exact nominal voltage range monitored by the TPS3702CX12DDCT?

The TPS3702CX12DDCT is specifically optimized for 1.2V nominal supply rails. Its internal thresholds are trimmed to deliver ±4% nominal window (±4.94% worst-case over temperature) centered at 1.2V - resulting in VIT–(UV) ≈ 1.142V and VIT+(OV) ≈ 1.259V under worst-case conditions. It does not support adjustable thresholds outside this factory-set 1.2V configuration.

How does the SET pin affect the TPS3702CX12DDCT's detection window?

The SET pin on the TPS3702CX12DDCT selects between two fixed accuracy bands: applying ≥750mV configures a ±4% nominal window (±4.94% worst-case), while ≤250mV selects ±9% (±9.9% worst-case). This changes the absolute trip points - e.g., at 1.2V nominal, ±4% yields ~1.152V/1.248V thresholds, whereas ±9% yields ~1.092V/1.308V - enabling adaptive sensitivity during startup or fault recovery.

Can the TPS3702CX12DDCT monitor supply voltages higher than 1.2V?

Yes - the SENSE pin accepts up to 6.5V regardless of nominal rail, but the TPS3702CX12DDCT's internal thresholds are fixed for 1.2V. To monitor higher rails (e.g., 3.3V or 5V), an external resistor divider is required, with design attention to SENSE input current (1.5µA max) to avoid accuracy degradation. The TPS3702CX33DDCT or TPS3702CX50DDCT variants are factory-trimmed for those rails instead.

What is the maximum sink current capability of the TPS3702CX12DDCT's UV and OV outputs?

Each open-drain output (UV and OV) of the TPS3702CX12DDCT can sink up to 10mA while maintaining VOL ≤ 250mV - verified across VDD = 1.3V to 5V and load currents up to 5mA. This allows direct driving of optocouplers, microcontroller reset inputs, or logic gates without additional buffering, supporting robust interface design in industrial environments.

Does the TPS3702CX12DDCT require external capacitors for stable operation?

Yes - a 0.1µF ceramic capacitor is required between VDD and GND, placed as close as possible to the TPS3702CX12DDCT's VDD and GND pins per TI layout guidelines. While the SENSE pin does not mandate a capacitor, adding a 1nF–10nF bypass is recommended in noisy environments (e.g., motor drives) to suppress transients that could affect detection timing or cause false trips.