Texas Instruments TPS3307-18DGNRG4

Overview

TPS3307-18DGNRG4 from Texas Instruments is a triple-voltage supervisor IC designed for DSP and microprocessor-based systems requiring simultaneous monitoring of 3.3V, 1.8V, and an adjustable supply (≥1.25V). It delivers fixed 200ms power-on reset delay, operates from 2V to 6V supply, draws ≤40µA, and features dual active-low/high RESET outputs with defined assertion down to VDD ≥1.1V. Used in industrial programmable controllers and automotive ECUs for reliable power sequencing.

For engineers reviewing the TPS3307-18DGNRG4 datasheet, TPS3307-18DGNRG4 pinout, TPS3307-18DGNRG4 application, or TPS3307-18DGNRG4 equivalent, key selection criteria include its triple-sense threshold accuracy (2.93V/1.68V/1.25V typ), MSOP-8 thermal performance, manual reset (MR) interface timing, and compatibility with TI's MSP430C325-based designs.

Technical Context

The TPS3307-18DGNRG4 integrates three independent voltage comparators with temperature-compensated 1.25V reference, enabling precise monitoring of nominal 3.3V (SENSE1), 1.8V (SENSE2), and user-defined (SENSE3) supplies. Each sense input exhibits hysteresis (30mV at 2.93V, 15mV at 1.68V) to prevent chatter during voltage transients.

Its internal 200ms reset timer initiates only after all three SENSE inputs exceed their respective VIT+ thresholds; RESET remains asserted if any SENSE drops below VIT−. The MR pin provides asynchronous reset control, while dual RESET outputs support both active-low and active-high logic families without external inversion.

Key Specifications

Pinout & Package

HVSSOP-8 (DGN) package: 3mm × 3mm, 0.65mm pitch, exposed thermal pad, 1.1mm max height. Optimized for high-density PCB layouts and improved thermal dissipation vs. SOIC-8.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-18DGNRG4, TPS3307-18DGNR offers identical functionality in tape-and-reel format for automated assembly, while MAX6832ASD+ trades dual-reset capability for sub-2µA quiescent current-making it suitable for energy-constrained edge sensors but less ideal for complex processor systems requiring both reset polarities.

Availability

TPS3307-18DGNRG4 is available at Aetrix Electronics and suitable for industrial programmable controls, automotive engine management systems, and portable medical instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for TPS3307-18DGNRG4 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 over 90 years of innovation history.

The TPS3307 family targets robust power sequencing in DSP and microprocessor-based systems, delivering triple-supervision with minimal external components and industrial-grade reliability.

FAQ

What is the function of the SENSE3 pin on the TPS3307-18DGNRG4?

The SENSE3 pin on the TPS3307-18DGNRG4 is an adjustable voltage monitor input referenced to an internal 1.25V precision bandgap. It allows supervision of any supply voltage >1.25V using an external resistor divider. Unlike SENSE1 and SENSE2, which have fixed thresholds (2.93V and 1.68V), SENSE3 provides design flexibility for custom rails such as 2.5V, 5V, or SoC-specific core voltages. Its threshold accuracy is ±1.5% over temperature.

Does the TPS3307-18DGNRG4 require an external capacitor for reset timing?

No, the TPS3307-18DGNRG4 does not require an external capacitor for reset timing. It incorporates an internal 200ms power-on reset delay generator that starts counting only after all three SENSE inputs exceed their respective VIT+ thresholds. This eliminates timing capacitor variability, aging, and PCB space-making the TPS3307-18DGNRG4 more reliable than capacitor-based supervisors in high-reliability applications.

How does the manual reset (MR) pin interact with the voltage monitoring function of the TPS3307-18DGNRG4?

The MR pin on the TPS3307-18DGNRG4 provides asynchronous, priority-level reset control: a low signal on MR forces both RESET outputs into their active states regardless of SENSE input conditions. The MR input is internally debounced and responds within 100ns (min pulse width). This allows system-level reset initiation via front-panel buttons, watchdog timeouts, or host processors-ensuring deterministic recovery even during supply instability.

What is the maximum supply voltage rating for the TPS3307-18DGNRG4, and what happens above that limit?

The absolute maximum supply voltage (VDD) for the TPS3307-18DGNRG4 is 7V, but continuous operation above 6V is not recommended. The device is rated for 2V to 6V under recommended operating conditions. Exceeding 6V may cause accelerated parametric drift or permanent damage; TI specifies that operation at 7V must be limited to <1000 hours total lifetime. Always use appropriate input filtering and clamping for transient-prone environments like automotive 12V systems.

Can the TPS3307-18DGNRG4 be used in designs requiring both active-low and active-high reset signals simultaneously?

Yes, the TPS3307-18DGNRG4 natively supports simultaneous active-low and active-high reset signaling via dedicated pins: pin 5 (RESET) is an open-drain active-low output requiring an external pull-up, and pin 6 (RESET) is a push-pull active-high output. Both outputs are synchronized and reflect identical reset state transitions. This eliminates the need for external inverters or logic gates-reducing component count and propagation delay in mixed-voltage systems such as those interfacing legacy 5V peripherals with modern 3.3V processors.