Texas Instruments TPS3307-25DGNRG4

Overview

TPS3307-25DGNRG4 from Texas Instruments is a triple-voltage supervisor IC designed for DSP, microcontroller, and microprocessor power sequencing and reset management. It monitors three independent supply rails-3.3V (SENSE1), 2.5V (SENSE2), and an adjustable voltage ≥1.25V (SENSE3)-with fixed 200ms reset delay, 40µA supply current, and operation from 2V to 6V VDD. It delivers active-low and active-high RESET outputs in an 8-pin HVSSOP package for industrial control and portable equipment.

For engineers reviewing the TPS3307-25DGNRG4 datasheet, TPS3307-25DGNRG4 pinout, TPS3307-25DGNRG4 application, or TPS3307-25DGNRG4 equivalent, key selection criteria include triple-supply threshold accuracy (±1.5% typical), manual reset (MR) support, guaranteed RESET assertion down to VDD ≥1.1V, and compatibility with -40°C to +85°C industrial temperature operation.

Technical Context

The TPS3307-25DGNRG4 implements three independent comparator-based sense channels with temperature-compensated 1.25V internal reference and resistor-divider-adjustable thresholds. Each SENSE input features hysteresis (20mV typical at 2.25V threshold) and precise negative-going trip points (VIT–) to prevent chatter during brownout recovery.

Its integrated 200ms power-on reset timer starts only after all three SENSE inputs exceed their respective VIT+ thresholds, ensuring coordinated system initialization. The dual RESET outputs (active-low and active-high) are synchronized and driven by robust CMOS buffers capable of ±2mA output current, supporting direct interface to processor reset inputs without external logic.

Key Specifications

Pinout & Package

HVSSOP-8 (DGN) package: 3 mm × 3 mm, 0.65 mm pitch, exposed thermal pad, 1.1 mm max height. Pin 1 index area marked; RoHS-compliant NiPdAu lead finish; MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-supply supervisory applications.

Compared with TPS3307-25DGNRG4, the TPS3307-25DGNR offers identical performance in a larger reel format for manufacturing scale, while the MAX6816EUT+T provides lower quiescent current but cannot replace triple-rail supervision without design-level duplication and layout rework.

Availability

TPS3307-25DGNRG4 is available at Aetrix Electronics and suitable for industrial programmable controllers, automotive body electronics, portable medical devices, and industrial IoT gateways requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3307-25DGNRG4 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 delivering analog, embedded processing, and connectivity solutions with over 50 years of innovation in power management and signal chain technologies.

The TPS3307 family was engineered specifically for robust, low-power reset supervision in multi-rail DSP and microprocessor systems-addressing the need for precise, coordinated power sequencing in space-constrained industrial and portable applications.

FAQ

What is the function of the SENSE3 pin on the TPS3307-25DGNRG4?

The SENSE3 pin on the TPS3307-25DGNRG4 provides an adjustable voltage monitoring input referenced to an internal 1.25V precision bandgap. When used with an external resistor divider, it enables supervision of any supply voltage ≥1.25V-such as 1.8V, 2.8V, or 5V rails-without requiring additional components beyond the divider network. This flexibility makes TPS3307-25DGNRG4 adaptable across diverse power architectures.

Does the TPS3307-25DGNRG4 require an external capacitor for its reset delay?

No, the TPS3307-25DGNRG4 does not require an external capacitor for its reset delay. It integrates a precision 200ms power-on reset timer that starts automatically after all three SENSE inputs exceed their threshold voltages. This eliminates the need for timing capacitors, reduces bill-of-materials count, improves timing accuracy across temperature and voltage, and enhances long-term reliability compared to RC-based solutions.

Can the TPS3307-25DGNRG4 be used in automotive applications?

Yes, the TPS3307-25DGNRG4 is rated for operation from –40°C to +85°C and meets industrial reliability standards. While not AEC-Q100 qualified, it is widely deployed in non-safety-critical automotive subsystems such as body control modules, infotainment power management, and telematics gateways. For ASIL-B/C applications, TI recommends the pin-compatible TPS3307-EP variant, which is enhanced for defense, aerospace, and medical use cases.

How does the manual reset (MR) pin interact with the SENSE inputs on the TPS3307-25DGNRG4?

The MR pin on the TPS3307-25DGNRG4 provides an asynchronous, active-low reset override. When MR is pulled low, both RESET outputs immediately assert regardless of SENSE input states. Once MR returns high, the device resumes normal supervision-only releasing RESET after all SENSE inputs exceed their VIT+ thresholds and the 200ms internal timer completes. This allows external microcontrollers or watchdog circuits to force a system reset independently of supply conditions.

What is the maximum output drive capability of the RESET pins on the TPS3307-25DGNRG4?

The active-low RESET pin on the TPS3307-25DGNRG4 can sink up to 5mA (IOL), while the active-high RESET pin can source up to 5mA (IOH). Both outputs are CMOS-compatible and support standard pull-up/pull-down configurations. For higher-current loads, external buffer transistors or logic gates may be required-but most modern MCUs and FPGAs accept these drive levels directly, eliminating need for additional interface circuitry.