Texas Instruments TPS3702CX18DDCR

Overview

TPS3702CX18DDCR from Texas Instruments is a high-accuracy window voltage detector IC designed for monitoring 1.8V nominal supply rails in safety-critical systems. It delivers ±0.25% typical threshold accuracy, 0.55% internal hysteresis, and operates across 2V–18V VDD with –40°C to 125°C industrial temperature range. Its dual open-drain UV/OV outputs support wired-OR reset signaling in FPGA power sequencing.

For engineers reviewing the TPS3702CX18DDCR datasheet, TPS3702CX18DDCR pinout, TPS3702CX18DDCR application, or TPS3702CX18DDCR equivalent, this page provides verified functional context, validated pin-level design meaning, confirmed rail-specific threshold behavior for 1.8V systems, and real-world alternative selection guidance based on TI's documented family variants.

Technical Context

The TPS3702CX18DDCR integrates two precision comparators with an internal trimmed resistor divider and reference to form a fixed-window detector optimized for 1.8V nominal rails. Its SET pin selects between ±4% and ±9% nominal threshold bands, enabling programmable fault sensitivity during startup versus steady-state operation.

It features independent active-low open-drain UV and OV outputs with 10mA sink capability, glitch immunity circuitry, and internal hysteresis (0.55% or 1.0%) to prevent chatter near trip points. The SENSE input accepts up to 6.5V regardless of VDD, supporting rail monitoring independent of supply voltage.

Key Specifications

Pinout & Package

SOT-6 (DDC) package: 2.90mm × 1.60mm body size, 0.95mm max height, gull-wing leads, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3702CX12DDCR and TPS3702CX33DDCR, the TPS3702CX18DDCR provides exact 1.8V threshold alignment without external scaling - delivering worst-case ±4.9% window accuracy where alternatives would require recalibration or fail specification compliance.

Availability

TPS3702CX18DDCR is available at Aetrix Electronics and suitable for FPGA power sequencing, DSP core supervision, and industrial PLC I/O modules requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS3702CX18DDCR 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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in precision voltage monitoring ICs.

The TPS3702 family was engineered specifically for high-reliability power rail supervision in safety-critical systems, featuring redundant sensing paths, programmable windows, and automotive-grade qualification across –40°C to 125°C.

FAQ

What is the nominal monitored voltage for TPS3702CX18DDCR?

The TPS3702CX18DDCR is factory-trimmed for a 1.8V nominal supply rail. Its internal resistor divider and reference are calibrated to detect undervoltage and overvoltage conditions relative to 1.8V, enabling ±4% or ±9% window configurations via the SET pin without external components. This fixed 1.8V alignment ensures optimal accuracy for applications like FPGA I/O banks and DSP core supplies.

How does the SET pin affect TPS3702CX18DDCR threshold behavior?

The SET pin on the TPS3702CX18DDCR selects between two nominal window widths: VIH ≥750mV configures ±4% (i.e., 1.728V–1.872V at 25°C), while VIL ≤250mV configures ±9% (i.e., 1.638V–1.962V). This allows dynamic adjustment - e.g., wider window during startup to avoid false resets, then tightening to ±4% during normal operation. The TPS3702CX18DDCR maintains ±0.9% total accuracy across –40°C to 125°C in either mode.

Can TPS3702CX18DDCR monitor voltages higher than its VDD supply?

Yes - the SENSE pin on the TPS3702CX18DDCR accepts inputs up to 6.5V independently of VDD (which ranges from 2V to 18V). This enables monitoring of higher-voltage rails (e.g., 3.3V or 5V) while powering the TPS3702CX18DDCR from a lower 2.5V or 3.3V supply. No level-shifting circuitry is needed, and input bias current remains ≤1.5µA to preserve accuracy.

What is the purpose of separate UV and OV outputs on TPS3702CX18DDCR?

The TPS3702CX18DDCR provides independent open-drain UV and OV outputs to enable differentiated fault reporting - e.g., logging undervoltage versus overvoltage events separately in a microcontroller. They can also be wired-OR'd together to generate a single reset signal. This dual-output architecture supports functional safety requirements (e.g., ISO 26262 ASIL-B) by allowing distinct diagnostic coverage paths, unlike single-output supervisors.

Does TPS3702CX18DDCR require external components for basic operation?

No - the TPS3702CX18DDCR requires no external resistors to set thresholds, as its internal trimmed divider is calibrated for 1.8V. Only two external components are recommended: a 0.1µF ceramic capacitor on VDD and pull-up resistors (2.2kΩ–10kΩ) on UV/OV outputs. This minimal BOM reduces cost, board space, and design validation effort compared to resistor-based window detectors.