Texas Instruments TPS3702CX10DDCR

Overview

TPS3702CX10DDCR from Texas Instruments is a high-accuracy window voltage detector IC designed for precision overvoltage and undervoltage monitoring of low-voltage supply rails (1V–5V nominal). 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, DSP reset supervision, and industrial safety-critical rail monitoring where narrow tolerance detection is required.

For engineers reviewing the TPS3702CX10DDCR datasheet, TPS3702CX10DDCR pinout, TPS3702CX10DDCR application, or TPS3702CX10DDCR equivalent, key selection considerations include its dual open-drain OV/UV outputs, SET-pin configurable accuracy bands (±4% or ±9% nominal), SOT-6 package footprint, 2V–18V VDD range, and independent SENSE input capable of monitoring up to 6.5V regardless of supply voltage.

Technical Context

The TPS3702CX10DDCR integrates two precision comparators with a trimmed internal resistor divider and reference, eliminating external resistors and enabling fixed ±4% / ±9% nominal window thresholds. Its architecture supports independent OV and UV assertion with active-low open-drain outputs that sink up to 10mA and tolerate pull-up voltages up to 18V - decoupled from VDD.

It features internal glitch immunity, 300µs startup delay (tSD), 19µs OV/UV high-to-low propagation delay, and undervoltage lockout (UVLO) at 1.3V–1.7V. The SET pin selects between two pretrimmed accuracy bands, while the SENSE–VDD separation enables redundant monitoring architectures required in functional safety designs.

Key Specifications

Pinout & Package

SOT-6 (DDC) package, 2.90mm × 1.60mm body size, surface-mount, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3702CX10DDCR, the CX12 variant removes configurability but offers identical performance in fixed-band use cases, while the MAX6373 provides lower-cost supervision at the expense of thermal accuracy, voltage range, and architectural flexibility - making it unsuitable for industrial or safety-critical deployment.

Availability

TPS3702CX10DDCR is available at Aetrix Electronics and suitable for FPGA power sequencing, DSP-based system reset supervision, and industrial control safety monitoring requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TPS3702CX10DDCR 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-reliability window monitoring in systems with narrow supply tolerances and functional safety requirements.

FAQ

What is the function of the SET pin on the TPS3702CX10DDCR?

The SET pin on the TPS3702CX10DDCR selects between two pretrimmed accuracy bands: applying ≥750 mV configures ±4% nominal thresholds, while ≤250 mV configures ±9% nominal thresholds. This enables dynamic adjustment of detection sensitivity - for example, widening the band during system startup to avoid false resets, then tightening it during steady-state operation. The TPS3702CX10DDCR uses internal pull-up current (600 nA) to simplify interface.

Can the TPS3702CX10DDCR monitor a 5V rail while powered from a 3.3V supply?

Yes. The TPS3702CX10DDCR supports independent SENSE and VDD pins: SENSE accepts up to 6.5V regardless of VDD, which can be as low as 2V. So it can monitor a 5V rail while powered from 3.3V, with OV/UV outputs pulled to 5V. This decoupling is essential for mixed-voltage systems and safety redundancy - a key feature distinguishing the TPS3702CX10DDCR from single-rail supervisors.

What is the maximum pull-up voltage allowed on the UV and OV pins of the TPS3702CX10DDCR?

The UV and OV pins of the TPS3702CX10DDCR support pull-up voltages up to 18V, independent of the VDD supply voltage. This allows direct interfacing with higher-voltage logic families or legacy reset controllers without level shifters. The outputs are open-drain and rated to sink up to 10mA, with VOL ≤ 250mV at IOUT = 5mA and VDD ≥ 5V - confirmed in the TPS3702CX10DDCR electrical characteristics table.

Does the TPS3702CX10DDCR provide hysteresis, and how is it implemented?

Yes, the TPS3702CX10DDCR provides internal hysteresis of 0.55% (typical) of the nominal trip point, with a maximum of 0.8%. This hysteresis is fixed and built into the comparator design - no external components are needed. It prevents output oscillation when the monitored voltage lingers near threshold due to noise or slow transients, ensuring clean, chatter-free UV and OV assertions. This value is specified in the TPS3702CX10DDCR datasheet Section 5.5.

How does the TPS3702CX10DDCR handle power-on reset behavior?

The TPS3702CX10DDCR incorporates a 300µs startup delay (tSD) after VDD rises above UVLO (1.3V–1.7V), during which outputs remain undefined. Once tSD elapses and VDD ≥ 2V, UV and OV respond to SENSE voltage per the truth table. Below V(POR) = 0.8V, outputs are fully undefined. This controlled initialization sequence ensures reliable reset assertion only after internal circuitry stabilizes - a defined behavior documented in the TPS3702CX10DDCR timing specifications.