Texas Instruments TPS3707-30DG4

Overview

TPS3707-30DG4 from Texas Instruments is a precision 3.0 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 TPS3707-30DG4 datasheet, TPS3707-30DG4 pinout, TPS3707-30DG4 application, or TPS3707-30DG4 equivalent, key selection criteria include its dual-reset output configuration, 2.63 V threshold accuracy over temperature, PFI comparator hysteresis of 10 mV, SOIC-8 package compatibility, and absence of watchdog functionality compared to TPS3705 variants.

Technical Context

The TPS3707-30DG4 implements a precision voltage supervision architecture using an internal 1.25 V reference and resistor divider to set V_IT– = 2.63 V (±3% over –40°C to 85°C). Its dual RESET outputs (active-low and active-high) enable direct interface with processors requiring either polarity, eliminating external inverters.

Unlike the TPS3705 series, the TPS3707-30DG4 omits the watchdog timer (no WDI/WDO pins) but retains the PFI/PFO power-fail comparator for secondary rail monitoring. The MR input provides asynchronous reset assertion, and all timing-including 200 ms reset delay-is internally generated without external components.

Key Specifications

Pinout & Package

TPS3707-30DG4 is supplied in an 8-pin SOIC (D) package measuring 3.90 mm × 4.90 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance R_θJA = 118.2°C/W enables operation at full rating up to +85°C ambient with minimal PCB copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3707-30DG4, the DR variant offers identical performance in tape-and-reel form for production lines, while the MAX706RCSA+ provides pin-compatible legacy support at the cost of reduced feature set and higher current draw-making it suitable only for minimal reset-only implementations.

Availability

TPS3707-30DG4 is available at Aetrix Electronics and suitable for industrial programmable controllers, automotive body electronics, and medical device power management requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TPS3707-30DG4 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 for industrial, automotive, and communications markets.

The TPS370x family was designed specifically for robust, low-power microprocessor supervision in harsh environments-emphasizing precision threshold accuracy, dual-output flexibility, and integrated power-fail detection without external timing components.

FAQ

What is the exact reset threshold voltage of the TPS3707-30DG4?

The TPS3707-30DG4 has a guaranteed negative-going input threshold voltage (V_IT–) of 2.63 V ±3% over –40°C to 85°C. This value is factory-trimmed and applies to the primary VDD supervision function-not the PFI comparator, which has a separate 1.25 V threshold. The "30" suffix explicitly denotes the 3.0 V nominal supply monitoring point.

Does the TPS3707-30DG4 include a watchdog timer?

No, the TPS3707-30DG4 does not include a watchdog timer. Unlike the TPS3705-x series, the TPS3707-30DG4 omits WDI and WDO pins and associated timing circuitry. Its functional focus is dual-polarity reset generation and power-fail monitoring. For watchdog capability, engineers must select a TPS3705-xx variant or add external supervision logic.

Can the TPS3707-30DG4 monitor a 12 V supply?

Yes-the TPS3707-30DG4 can monitor a 12 V supply using its PFI input with an external resistor divider. The PFI pin accepts up to VDD + 0.3 V, so with VDD = 5 V, it tolerates up to 5.3 V directly. To monitor 12 V, use a precision divider (e.g., 910 kΩ + 120 kΩ) to scale 12 V down to ~1.25 V at PFI. The PFO output then asserts when the scaled voltage falls below threshold.

What is the purpose of the NC pin on the TPS3707-30DG4?

Pin 6 on the TPS3707-30DG4 is designated NC (No Connection) in the SOIC-8 package. It is internally unconnected and must remain unpopulated or tied to GND-never to VDD or signal nets. This pin exists due to package pinout alignment with the TPS3705 series (which uses pin 6 for WDI) but serves no function in the TPS3707-30DG4.

How does the TPS3707-30DG4 differ from the MAX706R?

The TPS3707-30DG4 is pin-for-pin compatible with the MAX706R but adds critical enhancements: dual active-low/active-high RESET outputs (eliminating external inverters), integrated PFI/PFO for secondary supply monitoring, lower 50 µA supply current versus 80 µA, and tighter 2.63 V threshold tolerance (±3% vs ±5%). These features make it a functional upgrade-not just a drop-in replacement-for legacy MAX706R designs.