Texas Instruments TPS3700DSER

Overview

TPS3700DSER from Texas Instruments is a high-voltage window voltage detector IC designed for overvoltage and undervoltage monitoring in power-rail supervision circuits. It operates from 1.8 V to 18 V, features dual open-drain outputs (OUTA/OUTB), internal 400 mV reference with ±1.0% threshold accuracy over temperature, and built-in 5.5 mV hysteresis. It is used in industrial control systems to monitor 12-V or 5-V rails before enabling microcontrollers or FPGAs.

For engineers reviewing the TPS3700DSER datasheet, TPS3700DSER pinout, TPS3700DSER application, or TPS3700DSER equivalent, key selection criteria include its 18-V output rating independent of VDD, adjustable thresholds via external resistor dividers, low 5.5 µA quiescent current, –40°C to 125°C operation, and SOT-6 package compatibility with space-constrained embedded designs.

Technical Context

The TPS3700DSER integrates two precision comparators sharing a trimmed 400 mV internal reference: INA+ drives OUTA for undervoltage detection (low when input falls below VIT+ – Vhys), while INB– drives OUTB for overvoltage detection (low when input rises above VIT+). Both inputs accept 0–6.5 V regardless of VDD, enabling monitoring of rails higher than the supply.

Its open-drain outputs support pull-up to voltages up to 18 V-decoupled from VDD-allowing direct interface with reset inputs of diverse logic families. Internal hysteresis rejects noise-induced false triggering, and propagation delays are specified at 18 µs (tPHL) and 29 µs (tPLH) under 10-mV overdrive.

Key Specifications

Pinout & Package

TPS3700DSER is packaged in a 2.90 mm × 1.60 mm SOT-6 (DDC) package with gull-wing leads, optimized for automated assembly and thermal performance in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809EADBZR and MAX6816EUT+T, the TPS3700DSER uniquely delivers dual-channel window detection with 18-V output capability, adjustable thresholds down to 400 mV, and full –40°C to 125°C qualification-making it the only choice for high-voltage, wide-temperature, and flexible-rail supervision.

Availability

TPS3700DSER is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and embedded computing modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3700DSER 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 TPS3700 family was designed specifically for high-reliability power-rail supervision in harsh environments, emphasizing wide supply range, precision thresholding, and robust output drive capability for reset and enable signaling.

FAQ

What is the maximum input voltage allowed on INA+ and INB– pins of the TPS3700DSER?

The TPS3700DSER specifies a maximum input voltage of 6.5 V on both INA+ and INB– pins, regardless of VDD level. This allows safe monitoring of rails higher than VDD when used with an external resistor divider. Exceeding 6.5 V risks damage, as absolute maximum ratings limit these pins to 7 V transiently but recommend 6.5 V continuous operation per Recommended Operating Conditions.

Can the TPS3700DSER be used to monitor a 24-V rail?

Yes, the TPS3700DSER can monitor a 24-V rail by using an external resistor divider to scale the voltage down to ≤6.5 V at INA+ or INB–. Its 18-V output rating also permits pull-up to 24-V logic levels if interfacing with high-voltage reset inputs. The internal 400-mV reference and ±1.0% accuracy ensure precise threshold setting across temperature for such scaled applications.

Does the TPS3700DSER require external hysteresis components?

No, the TPS3700DSER includes built-in hysteresis of 5.5 mV typical (up to 12 mV max), eliminating the need for external hysteresis resistors. This internal hysteresis is applied automatically to both comparators and ensures stable output transitions without oscillation on noisy supply lines-reducing design complexity and component count.

What is the minimum VDD required for the TPS3700DSER to assert valid outputs?

The TPS3700DSER requires VDD ≥ 1.8 V for normal operation with valid outputs. Below this, undervoltage lockout (UVLO) activates at 1.3–1.7 V, driving OUTA low and OUTB high-impedance. At VDD < 0.8 V (V(POR)), both outputs enter high-impedance state. Valid output behavior is guaranteed only when VDD remains ≥1.8 V for ≥450 µs after power-on.

How does the TPS3700DSER differ from standard reset ICs like the TPS3839?

The TPS3700DSER differs fundamentally from single-threshold reset ICs like the TPS3839 by providing dual independent comparators with configurable polarity (INA+ noninverting, INB– inverting), enabling true window detection. It also offers 18-V output rating, wider 1.8–18 V supply range, and adjustable thresholds down to 400 mV-whereas TPS3839 is a fixed-threshold, single-output supervisor with 0.9–6 V supply and 3.3/5 V fixed options.