Texas Instruments TPS3702CX10DDCT

Overview

TPS3702CX10DDCT from Texas Instruments is a high-accuracy window voltage detector IC designed for precision overvoltage and undervoltage monitoring of low-voltage 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 supervision to prevent system malfunction during supply excursions.

For engineers reviewing the TPS3702CX10DDCT datasheet, TPS3702CX10DDCT pinout, TPS3702CX10DDCT application, or TPS3702CX10DDCT equivalent, this page provides verified functional context, validated pin roles, confirmed rail-specific accuracy behavior, real-world timing performance (35µs max low-to-high propagation), and direct alternative part comparisons with documented threshold and hysteresis differences.

Technical Context

The TPS3702CX10DDCT integrates two matched comparators and a precision trimmed resistor divider to form a fully self-contained window detector - eliminating external resistors and their tolerance-induced errors. Its SET pin selects between two fixed accuracy bands (±4% or ±9% nominal), enabling dynamic adjustment of detection sensitivity during startup or fault recovery.

It uses independent open-drain UV and OV outputs with 10mA sink capability and 18V pull-up compatibility, allowing wired-OR logic merging into single reset signals. Internal glitch immunity and built-in hysteresis suppress false triggers from noise or transient spikes on the SENSE input, which accepts up to 6.5V regardless of VDD (2V–18V).

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 TPS3702CX10DDCT, TPS3702CX12DDCT offers identical performance but removes configurability, while MAX6816EUT+T sacrifices overvoltage detection and accuracy to achieve lower quiescent current - making neither a drop-in replacement, but both viable for narrower functional scopes.

Availability

TPS3702CX10DDCT is available at Aetrix Electronics and suitable for FPGA power supervision, DSP core voltage monitoring, and industrial PLC I/O module supply monitoring requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.

Supply support for TPS3702CX10DDCT 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-accuracy window monitoring in safety-critical and low-margin power systems where external resistor networks are undesirable.

FAQ

What is the nominal voltage window configured by the SET pin on the TPS3702CX10DDCT?

The TPS3702CX10DDCT uses the SET pin to select between two fixed nominal window widths: applying ≤250 mV selects a ±9% window, while applying ≥750 mV selects a ±4% window. This selection directly determines the base threshold deviation from the monitored rail's nominal value - for example, on a 3.3V rail, SET high yields ~±0.132V bounds. The TPS3702CX10DDCT's ±0.9% total accuracy over temperature applies to both configurations.

Does the TPS3702CX10DDCT require external resistors to set its overvoltage and undervoltage thresholds?

No, the TPS3702CX10DDCT does not require external resistors. It integrates a precision trimmed resistor divider and reference circuit internally, enabling accurate window detection without external components. This eliminates resistor tolerance errors and reduces PCB area and BOM cost. All threshold accuracy specifications - including ±0.25% typical and ±0.9% over temperature - are guaranteed with this internal architecture, as confirmed in the TPS3702CX10DDCT datasheet Section 5.5.

What is the maximum sink current capability of the UV and OV outputs on the TPS3702CX10DDCT?

The UV and OV outputs of the TPS3702CX10DDCT each support up to 10 mA of sink current, as specified in the Absolute Maximum Ratings table (Section 5.1) and confirmed in Recommended Operating Conditions (Section 5.3). This allows direct interfacing with standard logic inputs or driving small-signal optocouplers without additional buffering. The TPS3702CX10DDCT maintains VOL ≤ 250 mV at 5 mA sink with VDD ≥ 5V, ensuring robust low-state signaling.

Can the TPS3702CX10DDCT monitor a supply voltage higher than its own VDD?

Yes, the TPS3702CX10DDCT can monitor a supply voltage higher than its VDD. The SENSE pin accepts up to 6.5 V regardless of VDD (which operates from 2 V to 18 V), enabling rail monitoring independent of device supply. For example, a 5 V rail can be monitored while powering the TPS3702CX10DDCT from a separate 3.3 V supply. This isolation is explicitly supported in the datasheet's Typical Application Circuit (Figure 7-5) and Section 7.1.2.

What is the startup delay and power-on reset behavior of the TPS3702CX10DDCT?

The TPS3702CX10DDCT has a 300 µs startup delay (tSD) after VDD rises above UVLO (1.3–1.7 V); outputs are undefined until this period elapses. Below the power-on reset voltage V(POR) = 0.8 V, both UV and OV states are indeterminate. Between V(POR) and UVLO, UV is asserted low while OV is high-impedance - a defined fail-safe state. This behavior is fully characterized in Section 6.4 and Figure 5-1 of the TPS3702CX10DDCT datasheet.