Texas Instruments TPS3307-18DGNG4

Overview

TPS3307-18DGNG4 from Texas Instruments is a triple-voltage supervisor IC designed for DSP, microcontroller, and microprocessor power sequencing and reset management. It monitors three independent supply rails-3.3V (SENSE1), 1.8V (SENSE2), and an adjustable rail ≥1.25V (SENSE3)-with fixed 200ms reset delay, 40µA supply current, and operation from 2V to 6V VDD. It enables robust system initialization in battery-powered industrial controllers.

For engineers reviewing the TPS3307-18DGNG4 datasheet, TPS3307-18DGNG4 pinout, TPS3307-18DGNG4 application, or TPS3307-18DGNG4 equivalent, this page delivers verified specifications, terminal functions, real-world use cases, and validated alternative options-all aligned to TI's SLVS199C revision December 2006 production data.

Technical Context

The TPS3307-18DGNG4 integrates three independent voltage comparators with temperature-compensated 1.25V reference, enabling simultaneous monitoring of 3.3V, 1.8V, and user-defined supplies. Its internal 200ms reset timer initiates only after all SENSE inputs exceed their respective thresholds (2.93V, 1.68V, and 1.25V), eliminating external timing capacitors.

It features dual active-reset outputs (RESET low, RESET high), manual reset (MR) input with 0.3×VDD/0.7×VDD logic thresholds, and hysteresis (10–40mV) per sense input to prevent chatter near threshold. All terminals operate across –40°C to +85°C with defined reset assertion down to VDD ≥1.1V.

Key Specifications

Pinout & Package

HVSSOP-8 (DGN) package: 3mm × 3mm, 0.65mm pitch, exposed thermal pad, 1.1mm max height. Pin 1 index area marked; RoHS-compliant NiPdAu lead finish; MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3307-18DGNG4, the SOIC-8 TPS3307-18D offers identical supervision logic but sacrifices space efficiency and thermal performance, while the TPS3808G18 reduces integration density and increases system-level complexity for multi-rail systems.

Availability

TPS3307-18DGNG4 is available at Aetrix Electronics and suitable for industrial programmable controls, automotive body electronics, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3307-18DGNG4 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 connectivity technologies, with decades of expertise in power management and system supervision ICs.

The TPS3307 family was engineered specifically for DSP and microprocessor-based systems needing coordinated multi-rail power-up sequencing and fail-safe reset generation-targeting industrial automation, automotive control units, and portable computing platforms.

FAQ

What is the exact reset delay time of the TPS3307-18DGNG4, and is it adjustable?

The TPS3307-18DGNG4 features a factory-trimmed, fixed reset delay time of 200ms (typical), with guaranteed range of 140ms to 280ms across temperature and voltage. This delay starts only after all three SENSE inputs exceed their respective thresholds and cannot be adjusted externally-no capacitor or resistor is required or supported.

Does the TPS3307-18DGNG4 support monitoring a 2.5V supply on SENSE2?

No-the TPS3307-18DGNG4 is variant-specific: SENSE2 is hard-configured for 1.8V nominal supervision (1.68V threshold). To monitor 2.5V, use TPS3307-25DGNG4 instead, which has a 2.25V SENSE2 threshold. Using TPS3307-18DGNG4 for 2.5V would result in premature or missed reset assertion.

How does the manual reset (MR) pin interact with the power-on reset behavior of the TPS3307-18DGNG4?

The MR pin is asynchronous and dominant: pulling MR low forces immediate active RESET state regardless of VDD level or SENSE input conditions. During power-up, if MR is held low until after VDD exceeds 1.1V, RESET remains asserted until MR is released *and* all SENSE inputs exceed thresholds plus the 200ms timer expires.

Can the TPS3307-18DGNG4 supervise a 5V rail, and if so, how?

Yes-via SENSE3, which uses an internal 1.25V reference. A resistor divider (e.g., 3.01kΩ + 1.0kΩ) scales 5V down to 1.25V at the SENSE3 pin. The device then monitors that divided voltage; any drop below 1.25V (typ) triggers RESET. Divider ratio must maintain >1.25V input even at minimum 5V rail (e.g., 4.75V).

What is the maximum sink current capability of the active-low RESET output on the TPS3307-18DGNG4?

The active-low RESET output is open-drain and rated for a maximum sink current (IOL) of 5mA at VOL ≤0.4V (VDD = 3.3V). Exceeding this may cause excessive voltage drop or thermal stress. For higher loads, add an external N-channel MOSFET or buffer stage driven by the push-pull RESET output.