Texas Instruments TPS3707-25DG4

Overview

TPS3707-25DG4 from Texas Instruments is a precision 2.25 V supply-voltage supervisor IC with active-low and active-high reset outputs, power-fail comparator (PFI/PFO), manual reset input (MR), and fixed 200 ms power-on reset delay. It operates from 2 V to 6 V, draws ≤50 µA supply current, and is rated for –40°C to 85°C. It is used in microcontroller-based industrial control systems requiring reliable power sequencing and brownout detection.

For engineers reviewing the TPS3707-25DG4 datasheet, TPS3707-25DG4 pinout, TPS3707-25DG4 application, or TPS3707-25DG4 equivalent, key selection criteria include its dual-reset output configuration, 2.25 V threshold accuracy (±2.2% over temperature), PFI comparator hysteresis (10 mV), SOIC-8 package compatibility, and absence of watchdog functionality-distinguishing it from TPS3705 variants.

Technical Context

The TPS3707-25DG4 implements a precision bandgap reference (1.25 V) and dual comparators: one monitors VDD against a factory-trimmed 2.25 V threshold (VIT–) with 40 mV hysteresis, while the second compares PFI voltage against a fixed 1.25 V reference. Its reset logic asserts active-low RESET when VDD falls below VIT– or MR is pulled low, and simultaneously drives active-high RESET high-enabling direct interface with processors requiring complementary reset signals.

No external capacitor is needed for the 200 ms reset timeout; timing is internally generated. The PFI input accepts voltages up to VDD + 0.3 V and supports external resistor dividers for monitoring auxiliary rails (e.g., 12 V via 910 kΩ/120 kΩ divider). All outputs are CMOS-compatible with rail-to-rail swing and specified drive strength (1 mA sink, 500 µA source).

Key Specifications

Pinout & Package

TPS3707-25DG4 is supplied in an 8-pin SOIC (D) package, 3.90 mm × 4.90 mm body size, with standard lead pitch and gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3707-25DG4, TPS3707-25DR offers identical performance in tape-and-reel format for volume manufacturing, while MAX706TSA+ provides basic reset only-lacking PFI monitoring, dual outputs, and the precise 2.25 V threshold critical for 2.5 V rail supervision.

Availability

TPS3707-25DG4 is available at Aetrix Electronics and suitable for industrial programmable controllers, automotive body electronics, and medical handheld devices requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS3707-25DG4 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and personal electronics markets.

The TPS370x family was designed specifically for robust power-supply supervision in microprocessor and DSP systems, emphasizing precision threshold accuracy, low power consumption, and integrated features like power-fail detection and manual reset-without requiring external timing components.

FAQ

What is the exact supply voltage threshold for TPS3707-25DG4?

The TPS3707-25DG4 has a factory-trimmed negative-going input threshold voltage (V_IT–) of 2.25 V, with a tolerance of ±2.2% over the full operating temperature range (–40°C to 85°C). This value is specified in Section 7.5 of the datasheet and applies directly to the VDD monitoring function of the TPS3707-25DG4.

Does TPS3707-25DG4 include a watchdog timer?

No, the TPS3707-25DG4 does not include a watchdog timer. Watchdog functionality is exclusive to the TPS3705-xx series. The TPS3707-25DG4 instead provides complementary active-low and active-high RESET outputs, making it distinct in function and pinout from watchdog-equipped variants.

What package type is used for TPS3707-25DG4?

The TPS3707-25DG4 uses an 8-pin SOIC (Small Outline Integrated Circuit) package, designated as "D" in TI's ordering nomenclature. Its body dimensions are 3.90 mm × 4.90 mm, with standard gull-wing leads compatible with industry-standard reflow profiles.

How does the PFI input function on TPS3707-25DG4?

The PFI input on the TPS3707-25DG4 compares an external voltage against an internal 1.25 V reference. When the applied PFI voltage drops below 1.25 V, the PFO output goes low. This enables monitoring of auxiliary supplies (e.g., 12 V battery) using a simple resistor divider, as documented in the TPS3707-25DG4 typical application circuit.

What is the reset timeout duration for TPS3707-25DG4?

The TPS3707-25DG4 features a fixed 200 ms power-on reset timeout, generated entirely internally. No external capacitor is required-this timing is guaranteed across temperature and supply voltage (2 V to 6 V) and is confirmed in the device's Electrical Characteristics table (Section 7.5, parameter "td").