Texas Instruments TPS3707-25DR

Overview

TPS3707-25DR from Texas Instruments is a precision 2.25 V supply-voltage supervisor IC with active-low and active-high reset outputs, fixed 200 ms power-on reset delay, 50 µA max supply current, and integrated power-fail comparator for low-battery warning - used in microcontroller-based industrial control systems requiring reliable brownout detection and dual-reset signaling.

For engineers reviewing the TPS3707-25DR datasheet, TPS3707-25DR pinout, TPS3707-25DR application, or TPS3707-25DR equivalent, key selection considerations include its dual-reset output architecture (RESET and RESET), 2.25 V threshold accuracy over –40°C to 85°C, PFI/PFO power-fail monitoring capability, SOIC-8 package compatibility, and absence of watchdog timer functionality compared to TPS3705 variants.

Technical Context

The TPS3707-25DR implements a precision bandgap reference and comparator-based supervision architecture that asserts RESET when VDD falls below 2.25 V (VIT–) with 40 mV hysteresis, while simultaneously enabling PFO assertion when PFI drops below 1.25 V. It operates across 2 V–6 V supply range and requires no external timing capacitor.

Unlike the TPS3705 series, this device omits watchdog logic and WDI/WDO pins, instead providing complementary reset outputs (active-low RESET and active-high RESET) on dedicated pins - enabling direct interface with processors requiring either polarity without external inverters.

Key Specifications

Pinout & Package

TPS3707-25DR is available in 8-pin SOIC (D) package (3.90 mm × 4.90 mm) with standard JEDEC outline and thermal pad not present. Pin functions are validated per TI SLVS184F Rev F datasheet Figures 6-2 and 6-4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3707-25DR, TPS3707-30DR offers identical functionality at a higher threshold for 3.0 V systems, while MAX706RCSA+ provides lower power but sacrifices PFI monitoring and complementary reset - making TPS3707-25DR uniquely suited for 2.5 V dual-output supervision with power-fail alerting.

Availability

TPS3707-25DR is available at Aetrix Electronics and suitable for industrial PLCs, automotive BCMs, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS3707-25DR 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 reliability validation in industrial and automotive markets.

The TPS370x family was designed specifically for robust microprocessor supervision in harsh environments - delivering precision voltage monitoring, deterministic reset timing, and auxiliary power-fail detection without external components.

FAQ

What is the exact reset threshold voltage for TPS3707-25DR?

The TPS3707-25DR has a guaranteed negative-going input threshold voltage (VIT–) of 2.25 V, with a tolerance of ±0.05 V over the full –40°C to +85°C operating temperature range. This value is factory-trimmed and specified in Section 7.5 of the SLVS184F datasheet under "VIT– Negative-going input threshold voltage" for TPS3707-25.

Does TPS3707-25DR include a watchdog timer function?

No, the TPS3707-25DR does not include a watchdog timer. Unlike the TPS3705-x series, it omits WDI and WDO pins entirely and instead provides complementary reset outputs (RESET and RESET). Watchdog functionality is exclusive to TPS3705 variants per the functional block diagram and feature description in Section 8.3.3 of the datasheet.

Can TPS3707-25DR be used to monitor a 12 V supply?

Yes - the TPS3707-25DR's PFI pin accepts input voltages up to VDD + 0.3 V, and its internal power-fail comparator has a fixed 1.25 V threshold. To monitor a 12 V rail, use a resistor divider (e.g., 910 kΩ + 120 kΩ) to scale 12 V down to ~1.25 V at PFI, as demonstrated in Figure 9-1 of the datasheet for the TPS3705-50 application.

What is the purpose of the NC pin on TPS3707-25DR?

Pin 6 on the TPS3707-25DR SOIC package is designated NC (No Connect) and is internally unconnected. Per Section 6.1 of the datasheet, it must remain unconnected or tied to GND - never to VDD - to avoid undefined behavior. This pin exists for package compatibility with the TPS3705 series, which uses it for WDI.

How does the dual-reset output architecture benefit system design?

The TPS3707-25DR's simultaneous active-low RESET and active-high RESET outputs allow direct interfacing with mixed-logic microcontrollers - for example, driving an ARM Cortex-M's active-low /RESET while also feeding an FPGA's active-high PROG_B. This eliminates external inverters, reduces PCB area, improves signal integrity, and avoids timing skew between reset domains.