Texas Instruments TPS3702CX12DDCR

Overview

TPS3702CX12DDCR from Texas Instruments is a high-accuracy window voltage detector IC designed for monitoring low-voltage supply rails (1V–5V nominal) in safety-critical power supervision 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/ASIC power sequencing to assert independent open-drain UV and OV reset signals when monitored voltage exits the precision window.

For engineers reviewing the TPS3702CX12DDCR datasheet, TPS3702CX12DDCR pinout, TPS3702CX12DDCR application, or TPS3702CX12DDCR equivalent, key selection considerations include its dual open-drain outputs, SET-pin configurable accuracy bands (±4% or ±9% nominal), SOT-6 package footprint, internal resistor divider eliminating external components, and guaranteed operation with VDD from 2V to 18V while monitoring up to 6.5V on SENSE.

Technical Context

The TPS3702CX12DDCR integrates two precision comparators with a trimmed internal resistor divider and reference to implement a fully self-contained window detector. Its architecture eliminates external resistors, ensuring threshold accuracy is not degraded by component tolerances or layout parasitics.

It supports dynamic accuracy reconfiguration via the SET pin: logic-high sets ±4% nominal thresholds (±4.9% worst-case over temperature), logic-low sets ±9% (±9.9% worst-case). Both UV and OV outputs are active-low, open-drain, independently controllable, and rated for 10mA sink current with pull-up voltages up to 18V - decoupled from VDD.

Key Specifications

Pinout & Package

SOT-6 (DDC) package: 2.90mm × 1.60mm body, 0.95mm height, gull-wing leads. RoHS-compliant, moisture sensitivity level 1 (MSL-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809E33DBVR and MAX6816EUT+T, the TPS3702CX12DDCR uniquely delivers true window supervision with factory-trimmed thresholds, dual independent outputs, and user-selectable accuracy bands - enabling both robust fault coverage and adaptive system-level power management strategies.

Availability

TPS3702CX12DDCR is available at Aetrix Electronics and suitable for FPGA power sequencing, DSP core monitoring, industrial PLC power integrity, and motor drive DC-link supervision requiring stable component supply and long-term production continuity.

Supply support for TPS3702CX12DDCR 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 personal electronics markets.

The TPS3702 family is part of TI's precision power-supply supervisors product line, engineered specifically for high-reliability systems demanding accurate, low-power, and configurable voltage monitoring across wide temperature ranges.

FAQ

What is the exact threshold voltage window for TPS3702CX12DDCR when the SET pin is high?

The TPS3702CX12DDCR is configured for ±4% nominal thresholds when SET ≥ 750 mV. For a 1.2V nominal rail, this yields VIT–(UV) = 1.152V and VIT+(OV) = 1.248V at 25°C. Including ±0.9% accuracy over –40°C to 125°C, worst-case window is 1.142V to 1.259V - verified in Section 7.2.1 of the SBVS251A datasheet. The TPS3702CX12DDCR maintains this specification without external components.

Can TPS3702CX12DDCR monitor a 5V rail directly on the SENSE pin?

Yes, the TPS3702CX12DDCR supports SENSE input voltages up to 6.5V, so a 5V rail can be connected directly without attenuation. The device's internal resistor divider is optimized for 1V–5V nominal rails, and the ±4% or ±9% accuracy bands apply directly. No external divider is needed, preserving accuracy and reducing BOM count. This capability is confirmed in Section 5.3 (Recommended Operating Conditions) and Figure 7-2 of the TPS3702CX12DDCR datasheet.

How does the TPS3702CX12DDCR handle power supply brownouts during system operation?

During a brownout, the TPS3702CX12DDCR asserts the UV output low when SENSE falls below VIT–(UV), and holds OV in high-impedance. If VDD drops below 1.3V (UVLO threshold), the UV output remains asserted while OV goes high-impedance - ensuring fail-safe reset behavior. Startup delay (tSD = 300µs) guarantees valid output states only after VDD stabilizes above 2V. These behaviors are defined in Sections 6.4.1–6.4.3 and Table 6-1 of the TPS3702CX12DDCR technical documentation.

Is the TPS3702CX12DDCR pin-compatible with other devices in the TPS3702 family?

Yes, all TPS3702 variants (e.g., TPS3702CX18DDCR, TPS3702CX33DDCR) share identical SOT-6 (DDC) pinout, electrical characteristics, and functional behavior - differing only in factory-programmed nominal threshold voltages. The TPS3702CX12DDCR uses the same UV, GND, SENSE, SET, VDD, and OV pin assignments and timing, enabling drop-in replacement across rail voltages without PCB changes.

What is the maximum sink current supported by the UV and OV outputs of TPS3702CX12DDCR?

The UV and OV outputs of the TPS3702CX12DDCR each support a maximum sink current of 10mA, as specified in Section 5.3 (Recommended Operating Conditions) of the datasheet. This allows direct driving of standard CMOS reset inputs, optocouplers, or LED indicators without external buffers. VOL remains ≤250mV at 10mA load when VDD ≥ 5V, ensuring clean logic-low signaling across temperature and supply variations.