Texas Instruments TPS3707-33DGNRG4

Overview

TPS3707-33DGNRG4 from Texas Instruments is a precision 3.3 V supply-voltage supervisor IC with active-low and active-high reset outputs, fixed 200 ms power-on reset delay, 2.93 V negative-going threshold (V_IT–), ≤50 µA supply current, and integrated power-fail comparator for low-battery warning in microprocessor-based systems.

For engineers reviewing the TPS3707-33DGNRG4 datasheet, TPS3707-33DGNRG4 pinout, TPS3707-33DGNRG4 application, or TPS3707-33DGNRG4 equivalent, key selection criteria include dual-reset output polarity, absence of watchdog timer, MSOP-PowerPAD™ 8-pin package compatibility, and –40°C to 85°C industrial temperature operation.

Technical Context

The TPS3707-33DGNRG4 implements a precision bandgap reference and comparator architecture to monitor V_DD against a factory-trimmed 2.93 V threshold with 50 mV hysteresis. It asserts active-low RESET when V_DD falls below V_IT– and releases it after a fixed 200 ms delay upon recovery above V_IT+.

Unlike the TPS3705-xx series, this device omits the watchdog timer but provides complementary RESET outputs (active-low and active-high) and a dedicated PFI/PFO pair for independent power-fail monitoring of auxiliary rails-enabling robust brownout detection and battery health signaling without external logic.

Key Specifications

Pinout & Package

TPS3707-33DGNRG4 uses an 8-pin MSOP-PowerPAD™ package (3.00 mm × 3.00 mm) with exposed thermal pad for enhanced heat dissipation. Pin 1 is RESET (active-low), Pin 2 is RESET (active-high), Pin 3 is MR (manual reset input), Pin 4 is V_DD, Pin 5 is GND, Pin 6 is PFI, Pin 7 is PFO, and Pin 8 is NC (no internal connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3707-33DR and MAX706RCSA+T, the TPS3707-33DGNRG4 delivers superior thermal performance in a 30% smaller footprint and uniquely integrates both complementary reset outputs and a dedicated power-fail comparator-reducing system-level component count and enabling predictive power management.

Availability

TPS3707-33DGNRG4 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, portable medical devices, and network infrastructure requiring stable component supply with guaranteed long-term availability.

Supply support for TPS3707-33DGNRG4 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 for industrial, automotive, and communications markets.

The TPS370x family was designed specifically for reliable power-supply monitoring in microprocessor-based systems-emphasizing precision threshold accuracy, low power consumption, and integration of complementary reset and power-fail functions.

FAQ

What is the exact reset threshold voltage for TPS3707-33DGNRG4?

The TPS3707-33DGNRG4 has a guaranteed negative-going input threshold voltage (V_IT–) of 2.93 V with ±70 mV tolerance over –40°C to 85°C. This is factory-trimmed to supervise 3.3 V supplies, ensuring RESET deassertion only when V_DD rises above ~3.0 V and remains stable for 200 ms.

Does TPS3707-33DGNRG4 include a watchdog timer function?

No, the TPS3707-33DGNRG4 does not include a watchdog timer. That feature is exclusive to the TPS3705-xx series. The TPS3707-33DGNRG4 instead provides complementary active-low and active-high RESET outputs and retains the PFI/PFO power-fail comparator for auxiliary rail monitoring.

What package type and thermal characteristics does TPS3707-33DGNRG4 use?

TPS3707-33DGNRG4 uses an 8-pin MSOP-PowerPAD™ package (3.00 mm × 3.00 mm) with exposed thermal pad. Its junction-to-ambient thermal resistance is 66.1°C/W, enabling full-rated operation at 85°C ambient without derating-unlike the SOIC version (TPS3707-33DR) which has 118.2°C/W.

Can TPS3707-33DGNRG4 monitor a 5 V or 12 V auxiliary supply?

Yes, the PFI input accepts voltages up to V_DD + 0.3 V and compares them against an internal 1.25 V reference. By adding a resistor divider (e.g., 910 kΩ/120 kΩ for 12 V), TPS3707-33DGNRG4 can accurately detect collapse of 5 V or 12 V rails and assert PFO to trigger system-level interrupts or shutdown sequences.

Is TPS3707-33DGNRG4 pin-compatible with MAX706-series supervisors?

Yes, TPS3707-33DGNRG4 is explicitly stated as pin-for-pin compatible with the MAX705 through MAX708 series in its official documentation. However, unlike MAX706, it adds complementary RESET outputs and PFI/PFO functionality-requiring verification of signal routing and load drive capability in legacy designs.