Texas Instruments TPS3702CX50DDCR

Overview

TPS3702CX50DDCR from Texas Instruments is a high-accuracy window voltage detector IC for overvoltage and undervoltage monitoring of low-voltage supply rails (1V–5V nominal), featuring ±0.25% typical threshold accuracy, 0.55% internal hysteresis, and dual open-drain outputs (UV/OV) in an SOT-6 package. It enables rail integrity supervision in FPGA power sequencing and safety-critical industrial controllers.

For engineers reviewing the TPS3702CX50DDCR datasheet, TPS3702CX50DDCR pinout, TPS3702CX50DDCR application, or TPS3702CX50DDCR equivalent, key selection considerations include its fixed ±5% window configuration, –40°C to 125°C industrial temperature range, 7µA quiescent current, SET-pin programmability between two accuracy bands, and independent UV/OV fault signaling with 10mA sink capability.

Technical Context

The TPS3702CX50DDCR integrates two precision comparators with a trimmed internal resistor divider and reference, eliminating external resistors and enabling guaranteed ±5% nominal window thresholds across temperature. Its architecture supports independent assertion of UV and OV outputs based on SENSE voltage crossing VIT–(UV) or VIT+(OV), with hysteresis preventing chatter near trip points.

It operates with VDD from 2V to 18V while monitoring SENSE up to 6.5V, allowing decoupled supply and monitored rail domains. The SET pin selects between ±5% (CX50 variant) and ±10% windows; for TPS3702CX50DDCR, SET ≥ 0.75V configures the tighter ±5% band, with worst-case total accuracy of ±4.9% including ±0.9% temp drift.

Key Specifications

Pinout & Package

SOT-6 package (2.90mm × 1.60mm body size) with gull-wing leads; moisture sensitivity level MSL-1, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6816EUK+T and TLV809EADBZR, the TPS3702CX50DDCR delivers true window supervision with matched UV/OV accuracy, configurable bands, and industrial-grade temperature performance - making it uniquely suited for safety-aware, multi-rail systems requiring single-chip fault discrimination.

Availability

TPS3702CX50DDCR is available at Aetrix Electronics and suitable for FPGA power sequencing, industrial PLC backplanes, and building automation controllers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3702CX50DDCR 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and communications markets.

The TPS3702 family is engineered for high-accuracy power-supply monitoring in safety-critical and high-reliability systems, with emphasis on rail integrity verification for FPGAs, ASICs, and real-time controllers operating across extended temperature ranges.

FAQ

What is the exact window threshold configuration for TPS3702CX50DDCR?

The TPS3702CX50DDCR is factory-configured for a nominal ±5% window around the monitored rail voltage (e.g., 3.3V ±5% = 3.135V to 3.465V). With ±0.9% accuracy over temperature, worst-case trip points are VIT–(UV) = 3.139V and VIT+(OV) = 3.463V at 3.3V nominal. The SET pin selects between this ±5% band and ±10% - for CX50, SET ≥ 0.75V activates the tighter band.

Does TPS3702CX50DDCR require external resistors to set thresholds?

No, the TPS3702CX50DDCR does not require external resistors. It integrates a precision trimmed resistor divider and reference, enabling fixed ±5% window thresholds directly. This eliminates resistor tolerance errors, reduces PCB area, and improves overall system accuracy compared to discrete resistor-based supervisors.

Can TPS3702CX50DDCR monitor a 5V rail while powered from a 3.3V supply?

Yes. The TPS3702CX50DDCR supports independent VDD (2V–18V) and SENSE (0V–6.5V) domains. When VDD = 3.3V and SENSE = 5V, the device accurately detects overvoltage (e.g., >5.25V) and undervoltage (e.g., <4.75V) on the 5V rail. Outputs remain compatible with 3.3V logic when pulled up to 3.3V.

How does the SET pin affect TPS3702CX50DDCR behavior?

The SET pin on TPS3702CX50DDCR selects between two accuracy bands: ≥0.75V configures the ±5% nominal window (CX50 function), while ≤0.25V configures ±10%. Internal 600nA pull-up holds SET high by default. This enables dynamic adjustment - e.g., widening the band during startup to avoid nuisance resets, then tightening post-stabilization.

What is the maximum sink current capability of TPS3702CX50DDCR outputs?

The UV and OV outputs of TPS3702CX50DDCR each support up to 10mA sink current at VOL ≤ 250mV (tested at VDD ≥ 2V, IOUT = 3–5mA). This allows direct driving of standard logic inputs, optocouplers, or small relays without external buffers, provided appropriate pull-up resistors are used per application voltage levels.