Texas Instruments TPS3809L30MDBVREP

Overview

TPS3809L30MDBVREP from Texas Instruments is a precision 3-pin supply voltage supervisor IC designed for power-on reset generation and supply monitoring in DSP, microcontroller, and processor-based systems. It features a fixed 2.64 V threshold voltage, 200 ms reset delay time, 9 µA typical supply current, and operates across –55°C to 125°C for aerospace, defense, and industrial applications.

For engineers reviewing the TPS3809L30MDBVREP datasheet, TPS3809L30MDBVREP pinout, TPS3809L30MDBVREP application, or TPS3809L30MDBVREP equivalent, this page delivers verified electrical parameters, thermal performance data, SOT-23 package layout, and drop-in alternatives for high-reliability embedded system design.

Technical Context

The TPS3809L30MDBVREP implements a precision bandgap reference (1.137 V) with internal resistor divider to set its 2.64 V threshold, enabling stable detection of VDD dips below nominal 3.0 V supply rails. Its reset logic asserts low-active RESET when VDD falls below VIT or rises above 1.1 V during power-up.

An integrated 200 ms timer ensures reliable system initialization after VDD exceeds VIT, with propagation delay under 1 ms and hysteresis of 35 mV to prevent chatter near threshold. No external components are required-functionality is fully self-contained within the 3-pin SOT-23 (DBV) package.

Key Specifications

Pinout & Package

SOT-23 (DBV) 3-pin plastic package, 1.45 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1, tape-and-reel (3000 pcs).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3809L30MDBVREP, MAX809LTR offers lower cost but sacrifices military-grade temperature range and long-term DMS continuity, while TPS3809K33MDBVREP provides identical reliability and form factor but targets higher supply voltages-making it a direct functional alternative only when threshold matching is re-evaluated.

Availability

TPS3809L30MDBVREP is available at Aetrix Electronics and suitable for avionics power sequencing, industrial PLC controllers, military radio baseband, and downhole oilfield sensors requiring stable component supply under extended temperature and long-lifecycle conditions.

Supply support for TPS3809L30MDBVREP 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 high-reliability components for industrial, automotive, aerospace, and communications markets.

The TPS3809-EP product line delivers radiation-tolerant, extended-temperature supervisors for mission-critical systems where supply integrity directly impacts safety and operational continuity.

FAQ

What is the exact reset threshold voltage of TPS3809L30MDBVREP?

The TPS3809L30MDBVREP has a guaranteed threshold voltage of 2.64 V, with min/max values of 2.58 V and 2.70 V across –55°C to 125°C. This value is factory-trimmed using an internal resistor divider and referenced to a 1.137 V bandgap, ensuring stable detection of 3.0 V supply deviations without external calibration. The TPS3809L30MDBVREP datasheet specifies this parameter under Electrical Characteristics with test conditions including VDD = 2.5 V to 6 V and IOL = 50 µA.

Does TPS3809L30MDBVREP require external components to function?

No, the TPS3809L30MDBVREP operates autonomously with no external components required. Its internal precision reference, resistor divider, timer, and open-drain output eliminate the need for capacitors, resistors, or additional ICs. A pull-up resistor on the RESET pin is recommended for logic-level compatibility but is not part of the core supervision function. The TPS3809L30MDBVREP achieves full functionality in a 3-pin SOT-23 footprint, reducing BOM count and board space.

Is TPS3809L30MDBVREP pin-compatible with MAX809 series devices?

Yes, the TPS3809L30MDBVREP is explicitly documented as pin-for-pin compatible with MAX809L, sharing identical SOT-23 (DBV) pinout: Pin 1 = RESET, Pin 2 = VDD, Pin 3 = GND. TI confirms this compatibility in the official datasheet's FEATURES section. While electrical parameters such as threshold voltage (2.64 V vs. 2.63 V) and delay time (200 ms vs. 240 ms) differ slightly, the TPS3809L30MDBVREP can replace MAX809L in existing layouts without PCB modification-subject to validation of timing and voltage margin in the target application.

What is the maximum supply voltage rating for TPS3809L30MDBVREP?

The absolute maximum supply voltage for TPS3809L30MDBVREP is 7 V, but the recommended operating range is 2 V to 6 V. Operation at 7 V is limited to ≤1000 hours continuous duty to ensure long-term reliability. Within the 2–6 V range, the TPS3809L30MDBVREP maintains specified threshold accuracy, delay time, and output drive capability. Exceeding 6 V risks accelerated parametric shift and reduced lifetime, especially at elevated temperatures.

How does the hysteresis of TPS3809L30MDBVREP improve system robustness?

The TPS3809L30MDBVREP incorporates 35 mV of built-in hysteresis (V_hys) between rising and falling threshold points, preventing output oscillation during slow or noisy supply transitions near the 2.64 V trip point. This ensures clean, chatter-free reset assertion and deassertion-critical for deterministic boot sequences in DSP and microcontroller systems. Unlike discrete solutions requiring external hysteresis networks, the TPS3809L30MDBVREP delivers this feature inherently, simplifying design and improving long-term stability across temperature and voltage variation.