Texas Instruments TLV809L30DBVT

Overview

TLV809L30DBVT from Texas Instruments is a 3-pin push-pull supply voltage supervisor IC designed for undervoltage monitoring and power-on reset generation in microcontroller, DSP, and FPGA systems. It features a fixed 2.64 V detection threshold (V_IT–), 200 ms reset delay (t_d), 9 µA typical supply current, and operates across –40°C to +85°C. It is used in battery-powered equipment and industrial control systems requiring reliable power sequencing.

For engineers reviewing the TLV809L30DBVT datasheet, TLV809L30DBVT pinout, TLV809L30DBVT application, or TLV809L30DBVT equivalent, key selection considerations include its precise 2.64 V threshold, push-pull RESET output, SOT-23 (DBV) package compatibility, low quiescent current, and immunity to fast VDD transients per t_w = 10 µs specification.

Technical Context

The TLV809L30DBVT implements a precision bandgap-based voltage reference and comparator to monitor VDD against a fixed 2.64 V threshold with 35 mV hysteresis. Its internal oscillator-driven timer ensures a guaranteed 120–280 ms reset assertion delay after VDD rises above V_IT–, meeting system-level power-up timing requirements without external components.

It operates in two functional modes: normal operation (VDD = 2–6 V), where it actively monitors for undervoltage, and shutdown mode (VDD < 1.1 V), where RESET is forced active and the output enters high-impedance state. The push-pull output drives RESET directly without pull-up resistors, supporting both CMOS and TTL logic interfaces.

Key Specifications

Pinout & Package

SOT-23 (DBV) 3-pin plastic package, 2.90 mm × 1.60 mm body size, tape-and-reel (250 pcs), RoHS-compliant, NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809L30DBVT, TLV809K33DBVT shifts detection upward to match 3.3 V systems, while MAX809TRD2T offers a second-source option with tighter current spec but identical functional envelope-neither is pin-to-pin or drop-in without threshold validation.

Availability

TLV809L30DBVT is available at Aetrix Electronics and suitable for factory automation, portable equipment, and building automation applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for TLV809L30DBVT 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 personal electronics markets.

The TLV809 family belongs to TI's precision voltage supervisor product line, engineered specifically for robust, low-power power-on reset and undervoltage protection in resource-constrained embedded systems.

FAQ

What is the exact reset threshold voltage of the TLV809L30DBVT?

The TLV809L30DBVT has a guaranteed negative-going input threshold voltage (V_IT–) of 2.64 V, with a min/max range of 2.58 V to 2.70 V over –40°C to +85°C. This value is factory-trimmed and specified in Section 7.5 of the datasheet; it corresponds to ~88% of a nominal 3.0 V supply, enabling reliable brownout detection before critical logic fails.

Does the TLV809L30DBVT require an external pull-up resistor on the RESET pin?

No, the TLV809L30DBVT features a push-pull RESET output stage, meaning it actively drives both high and low states without requiring an external pull-up resistor. This simplifies layout, reduces component count, and ensures fast, deterministic reset signaling-unlike open-drain alternatives such as the TLV803 series.

Can the TLV809L30DBVT be used to supervise a 5 V supply rail?

Yes, the TLV809L30DBVT supports VDD inputs from 2 V to 6 V, making it compatible with 5 V rails-but its 2.64 V threshold is optimized for 3.0 V systems. For 5 V supervision, TI recommends the TLV809I50DBVT (4.55 V threshold); using TLV809L30DBVT on 5 V would assert reset only during severe undervoltage (<53% of nominal), which may not meet system safety requirements.

What is the purpose of the 0.1 µF capacitor recommended on the VDD pin of the TLV809L30DBVT?

The 0.1 µF ceramic capacitor placed between VDD and GND stabilizes the internal voltage reference and improves noise immunity, especially against fast transients. Per Section 7.3 and Figure 9-1, this capacitor is essential to maintain accurate threshold detection and ensure reliable rejection of VDD spikes ≥10 µs in duration-omitting it risks false resets or delayed assertion.

How does the TLV809L30DBVT behave when VDD falls below 1.1 V?

When VDD drops below 1.1 V, the TLV809L30DBVT enters shutdown mode: the RESET output turns off and becomes high-impedance, allowing an external pull-up (if present) to define the voltage level. This behavior is defined in Section 9.1.2 and ensures predictable reset signaling during deep brownout or complete power loss, preventing undefined logic states on the reset line.