Texas Instruments TPS3307-25DGNG4

Overview

TPS3307-25DGNG4 from Texas Instruments is a triple voltage supervisor IC designed for DSP, microcontroller, and microprocessor systems requiring independent monitoring of 3.3V, 2.5V, and adjustable supply rails. It delivers fixed 200ms power-on reset delay, operates from 2V to 6V supply, draws ≤40µA quiescent current, and features dual active-low/high RESET outputs. It is deployed in industrial programmable controls and automotive ECUs where multi-rail integrity is critical.

For engineers reviewing the TPS3307-25DGNG4 datasheet, TPS3307-25DGNG4 pinout, TPS3307-25DGNG4 application, or TPS3307-25DGNG4 equivalent, key selection criteria include SENSE1/SENSE2 threshold accuracy (2.93V / 2.25V), manual reset (MR) timing compatibility, dual RESET polarity support, and HVSSOP-8 thermal performance in space-constrained embedded designs.

Technical Context

The TPS3307-25DGNG4 integrates three independent voltage comparators with temperature-compensated 1.25V reference, enabling precise monitoring of nominal 3.3V (SENSE1), 2.5V (SENSE2), and user-defined >1.25V (SENSE3) supplies. Each input exhibits 20–40mV hysteresis depending on threshold level to prevent noise-induced false resets.

Its internal 200ms reset timer initiates only after all three SENSE inputs exceed their respective VIT+ thresholds, ensuring coordinated system initialization. The MR input provides asynchronous reset assertion, while dual complementary RESET outputs simplify interface with both active-low and active-high logic domains without external inverters.

Key Specifications

Pinout & Package

HVSSOP-8 (DGN) package: 3mm × 3mm, 0.65mm pitch, exposed thermal pad, 1.1mm max height - optimized for high-density PCB layouts and thermal dissipation in compact modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-25DGNG4, the SOIC-8 TPS3307-25DR trades thermal performance for ease of hand-soldering, while the MAX6816TPA+ sacrifices design flexibility (no adjustable sense) for tighter delay tolerance - neither offers the same combination of adjustable rail monitoring, dual RESET polarity, and HVSSOP thermal efficiency.

Availability

TPS3307-25DGNG4 is available at Aetrix Electronics and suitable for industrial programmable controls, automotive engine management systems, and portable medical diagnostics requiring stable component supply and long-term production continuity.

Supply support for TPS3307-25DGNG4 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 specializing in analog, embedded processing, and power management technologies, with decades of automotive and industrial qualification expertise.

The TPS3307 family was engineered specifically for multi-rail DSP and microprocessor systems needing coordinated, low-power supply supervision - addressing reliability gaps in early-generation single-supervisor solutions.

FAQ

What is the exact SENSE1 and SENSE2 threshold voltage for TPS3307-25DGNG4?

The TPS3307-25DGNG4 has a typical SENSE1 threshold (VIT+) of 2.93V and SENSE2 threshold (VIT+) of 2.25V, with guaranteed min/max bounds of 2.86V–3.02V and 2.20V–2.32V respectively across –40°C to +85°C. These values are factory-trimmed and do not require external calibration. The TPS3307-25DGNG4 uses an internal temperature-compensated reference to maintain stability across operating conditions.

Does TPS3307-25DGNG4 require an external capacitor for the reset delay function?

No, the TPS3307-25DGNG4 integrates a fixed 200ms reset delay timer that requires no external capacitor. This eliminates component count, placement uncertainty, and aging-related drift associated with RC networks. The delay starts only after all three SENSE inputs exceed their VIT+ thresholds, ensuring robust power sequencing. The TPS3307-25DGNG4 achieves this with on-chip oscillator and counter circuitry.

Can TPS3307-25DGNG4 monitor a 1.8V supply rail?

Yes - the TPS3307-25DGNG4 can monitor a 1.8V rail using the adjustable SENSE3 input. Since SENSE3's base threshold is 1.25V, a simple two-resistor divider (e.g., 110kΩ top, 220kΩ bottom) scales 1.8V down to ~0.6V at the input, which is then compared against the internal 1.25V reference. The TPS3307-25DGNG4 datasheet provides design equations and examples for configuring SENSE3 for any rail >1.25V.

What is the maximum supply voltage rating for TPS3307-25DGNG4?

The absolute maximum supply voltage (VDD) for TPS3307-25DGNG4 is 7V, but the recommended operating range is 2V to 6V. Operation at 7V is limited to ≤1000 hours continuous duty per TI's reliability guidelines. Exceeding 6V risks accelerated parametric shift or latch-up. The TPS3307-25DGNG4's internal protection diodes clamp inputs to VDD +0.3V, so external clamping is unnecessary within spec.

How does the MR (manual reset) input behave on TPS3307-25DGNG4?

The MR input on TPS3307-25DGNG4 is active-low and features built-in Schmitt-trigger hysteresis (≈0.1×VDD), eliminating need for external debounce components. Pulling MR below 0.3×VDD asserts both RESET outputs immediately, overriding all SENSE inputs. Release of MR initiates the full 200ms delay before deassertion - identical to power-on behavior. The TPS3307-25DGNG4 specifies MR input current as –600µA max at 0V, supporting direct connection to open-drain microcontroller GPIO.