Texas Instruments TPS3307-25DG4

Overview

TPS3307-25DG4 from Texas Instruments is a triple voltage supervisor IC for DSP and microprocessor-based systems, monitoring 3.3V, 2.5V, and adjustable supply rails with fixed 200ms reset delay, 40µA supply current, and operation from –40°C to +85°C. It delivers active-low and active-high RESET outputs for robust system initialization in industrial controllers and portable equipment.

For engineers reviewing the TPS3307-25DG4 datasheet, TPS3307-25DG4 pinout, TPS3307-25DG4 application, or TPS3307-25DG4 equivalent, key selection criteria include triple-supply threshold accuracy (2.93V/2.25V/1.25V), manual reset input compatibility, SOIC-8 package footprint, and guaranteed RESET assertion down to VDD ≥1.1V.

Technical Context

The TPS3307-25DG4 integrates three independent voltage comparators with temperature-compensated 1.25V reference, enabling precise monitoring of 3.3V (VIT+ = 2.93V), 2.5V (VIT+ = 2.25V), and user-defined supplies (>1.25V) via external resistor dividers. Each SENSE input features 20–40mV hysteresis depending on threshold level.

Its internal power-on reset generator asserts RESET when VDD exceeds 1.1V and holds it active until all SENSE inputs rise above their respective VIT+ thresholds, then applies a 200ms (typ) delay before deassertion. The MR input provides asynchronous reset control, while dual RESET outputs support both active-low and active-high logic families.

Key Specifications

Pinout & Package

TPS3307-25DG4 is packaged in an 8-pin SOIC (D) package with 1.27mm pitch, 3.9mm width, and 1.75mm max height - compatible with standard surface-mount assembly processes and IPC-7351 land patterns.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-25D, the TPS3307-25DG4 offers identical functionality in the same SOIC-8 package, while MAX6832ASD+ trades lower power and dual outputs for reduced delay and single-output architecture - making TPS3307-25DG4 optimal for new designs demanding micropower and interface flexibility.

Availability

TPS3307-25DG4 is available at Aetrix Electronics and suitable for industrial programmable controls, automotive body electronics, and portable medical devices requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TPS3307-25DG4 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 and embedded processing technologies, with decades of expertise in power management and system supervision ICs.

The TPS3307 family was designed specifically for DSP and microprocessor-based systems needing simultaneous multi-rail monitoring, delivering integrated reset timing, manual reset capability, and industrial temperature reliability in compact packages.

FAQ

What is the exact function of the SENSE3 pin on the TPS3307-25DG4?

The SENSE3 pin on the TPS3307-25DG4 is an adjustable voltage monitor input referenced to an internal 1.25V precision bandgap. It allows supervision of any supply voltage greater than 1.25V using an external resistor divider - for example, configuring it to monitor a 1.8V rail by setting the divider ratio to produce 1.25V at SENSE3 when the rail is at nominal voltage. This flexibility makes the TPS3307-25DG4 adaptable across diverse power architectures without redesigning the supervisor circuit.

Does the TPS3307-25DG4 require an external capacitor for its reset delay function?

No, the TPS3307-25DG4 does not require an external capacitor for its reset delay function. It incorporates an internal timer that provides a fixed 200ms (typical) delay after all monitored supply voltages exceed their respective threshold levels. This eliminates the need for external timing components, simplifying layout, improving reliability, and reducing bill-of-materials cost - a key differentiator versus discrete RC-based reset circuits or older supervisor ICs requiring capacitor-based timing.

Can the TPS3307-25DG4 operate reliably with a 2.0V supply voltage?

Yes, the TPS3307-25DG4 is fully specified to operate with a minimum supply voltage of 2.0V, as confirmed in its Recommended Operating Conditions table. At VDD = 2.0V, it maintains functional RESET assertion down to 1.1V, sustains accurate SENSE threshold detection (2.93V/2.25V/1.25V), and delivers guaranteed 200ms reset delay. Its 40µA maximum supply current remains valid across the full 2V–6V range, making it suitable for low-voltage systems such as energy-harvesting nodes or partial-power-down states.

How does the manual reset (MR) input interact with the automatic reset behavior of the TPS3307-25DG4?

The MR input on the TPS3307-25DG4 provides asynchronous override of the automatic supervision logic: pulling MR low immediately forces both RESET outputs into their active states (RESET low, RESET high), regardless of SENSE input conditions or VDD level. When MR returns high, the device resumes normal operation - meaning RESET deasserts only after all SENSE inputs exceed their VIT+ thresholds and the 200ms internal timer expires. This behavior enables pushbutton-initiated resets, watchdog-triggered recovery, or system-level fault escalation without interfering with autonomous voltage monitoring.

What package type and markings identify the TPS3307-25DG4?

The TPS3307-25DG4 is supplied in an 8-pin SOIC (D) package per JEDEC MS-012, with standard 3.9mm body width and 1.27mm lead pitch. Its top-side marking is "30725", as documented in TI's Package Option Addendum. The "G4" suffix denotes TI's green (lead-free, RoHS-compliant) packaging standard with NiPdAu lead finish and Level-1 moisture sensitivity rating - confirming suitability for standard reflow assembly without special handling requirements.