Texas Instruments TPS3702CX12QDDCRQ1

Overview

TPS3702CX12QDDCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive window voltage detector with ±4% nominal threshold accuracy (SET high), 0.9% total threshold accuracy over –40°C to 125°C, 7µA typical quiescent current, and dual open-drain UV/OV outputs. It monitors supply rails from 1V to 5V nominal in safety-critical systems such as front/rear-view cameras and radar ECUs.

For engineers reviewing the TPS3702CX12QDDCRQ1 datasheet, TPS3702CX12QDDCRQ1 pinout, TPS3702CX12QDDCRQ1 application, or TPS3702CX12QDDCRQ1 equivalent, key selection factors include its internal resistor-divider architecture eliminating external components, SET-pin configurable accuracy bands, SENSE/VDD voltage independence, and automotive-grade glitch immunity for reliable reset assertion in noisy environments.

Technical Context

The TPS3702CX12QDDCRQ1 integrates two precision comparators and a trimmed internal resistor divider to form a window detector without external resistors. Its dual open-drain outputs (UV and OV) operate independently, each sinking up to 10mA with VOL ≤ 250mV at 5mA load, and support pull-up voltages up to 18V regardless of VDD.

Threshold hysteresis is fixed at 0.55% of the nominal trip point, and the SET pin selects between ±4% (VIH applied) or ±9% (VIL applied) nominal windows. Startup delay is 300µs, propagation delays are 19µs (HL) and 35µs (LH), and internal glitch immunity rejects transients below defined overdrive thresholds.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3702CX12QDDCRQ1, the TPS3702CX18QDDCRQ1 offers identical automotive qualification and pinout but removes SET flexibility for lower system complexity, while TLV809EYZTR reduces integration at the cost of losing overvoltage detection, internal resistor accuracy, and AEC-Q100 Grade 1 thermal range.

Availability

TPS3702CX12QDDCRQ1 is available at Aetrix Electronics and suitable for automotive radar systems, front/rear-view camera modules, and infotainment domain controllers requiring stable component supply across extended temperature and long production lifecycles.

Supply support for TPS3702CX12QDDCRQ1 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 designing analog ICs, embedded processors, and automotive electronics with emphasis on reliability, precision, and functional safety.

The TPS3702-Q1 product line delivers AEC-Q100 qualified window voltage detectors for ASIL-B capable systems, targeting power rail supervision in ADAS, body electronics, and powertrain control units where deterministic fault detection is mandatory.

FAQ

What is the nominal voltage window configured for TPS3702CX12QDDCRQ1?

The TPS3702CX12QDDCRQ1 is factory-configured for a ±4% nominal window (e.g., 3.3V rail monitored from 3.168V to 3.432V). This is selected by applying VIH (≥750mV) to the SET pin. The worst-case window including ±0.9% accuracy is ±4.9%, meaning the TPS3702CX12QDDCRQ1 asserts UV below 3.139V and OV above 3.463V for a 3.3V rail.

Can TPS3702CX12QDDCRQ1 monitor a 5V rail directly?

Yes, the TPS3702CX12QDDCRQ1 supports SENSE input up to 6.5V, making it suitable for direct monitoring of 5V nominal rails. Its internal resistor divider is optimized for 1V–5V rails, and with ±4% nominal accuracy, it detects excursions outside 4.8V–5.2V (±4%) or 4.55V–5.45V (±4.9% worst-case) without external components.

How does the SET pin affect TPS3702CX12QDDCRQ1 behavior?

The SET pin on TPS3702CX12QDDCRQ1 selects between two accuracy bands: VIH (≥750mV) configures ±4% nominal thresholds, while VIL (≤250mV) configures ±9%. This allows dynamic adjustment - e.g., widening the window during startup to avoid false resets, then tightening it during normal operation. The TPS3702CX12QDDCRQ1 retains its ±0.9% accuracy specification across both modes.

What is the maximum pull-up voltage allowed on UV and OV pins of TPS3702CX12QDDCRQ1?

The UV and OV pins of TPS3702CX12QDDCRQ1 support pull-up voltages up to 18V, independent of the VDD supply voltage. This enables direct interfacing with higher-voltage logic domains (e.g., 12V microcontroller resets) without level shifters. The outputs sink up to 10mA with VOL ≤ 250mV at 5mA load, ensuring robust signal integrity.

Does TPS3702CX12QDDCRQ1 require external resistors for threshold setting?

No, the TPS3702CX12QDDCRQ1 integrates precision-trimmed resistors for both overvoltage and undervoltage thresholds, eliminating all external resistors. This removes resistor tolerance errors, reduces PCB area, lowers BOM cost, and improves overall accuracy - a key differentiator versus discrete comparator-based solutions that require two matched resistors per threshold.