Texas Instruments TLV809EA30DBZR

Overview

TLV809EA30DBZR from Texas Instruments is a push-pull, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in low-power systems. It features a 3.0 V ±0.5% threshold voltage, 200 ms fixed reset delay, 250 nA typical supply current, and operates across –40°C to +125°C. It is used in battery-powered microcontroller systems to ensure deterministic startup and fault recovery.

For engineers reviewing the TLV809EA30DBZR datasheet, TLV809EA30DBZR pinout, TLV809EA30DBZR application, or TLV809EA30DBZR equivalent, key selection criteria include its guaranteed reset assertion down to 0.7 V VDD, SOT-23-3 (DBZ) package with pin 1 = GND, push-pull output eliminating external pull-up requirements, and ±0.5% threshold accuracy over full temperature range.

Technical Context

The TLV809EA30DBZR implements a precision bandgap-referenced comparator with integrated hysteresis (±0.9–1.5%) to prevent chatter during threshold crossings. Its internal timer enforces a fixed 200 ms reset timeout after VDD rises above VIT+ (3.0 V + VHYS), ensuring sufficient system stabilization before release.

It delivers glitch immunity of 10 µs typical against fast transients on VDD, with propagation delay <50 µs from VDD falling below 3.0 V to RESET assertion. The device maintains defined logic state (active-low RESET) for supply voltages as low as 0.7 V, enabling robust operation during deep brownouts.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = GND (per Device Naming Nomenclature and Figure 6-1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3809K33DBVR and MAX809TRD3-T, TLV809EA30DBZR offers superior low-voltage operability (0.7 V VPOR), tighter threshold accuracy (±0.5%), and lower quiescent current (250 nA), making it optimal for battery longevity and harsh-environment reliability-without requiring PCB changes.

Availability

TLV809EA30DBZR is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered IoT sensor nodes, industrial PLC I/O modules, and set-top box power management requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for TLV809EA30DBZR 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 and embedded processing solutions, with decades of expertise in precision power management and signal chain ICs.

The TLV809E series belongs to TI's low-power voltage supervisor product line, engineered specifically for deterministic reset generation in space-constrained, energy-sensitive applications such as portable medical devices and automotive body electronics.

FAQ

What is the exact reset threshold voltage of TLV809EA30DBZR?

The TLV809EA30DBZR has a factory-programmed falling threshold voltage (V_IT–) of 3.0 V with ±0.5% typical accuracy across –40°C to +125°C. This value is laser-trimmed during production and does not require external components to set, ensuring consistent performance across units and temperature.

Does TLV809EA30DBZR require an external pull-up resistor on the RESET pin?

No, TLV809EA30DBZR uses a push-pull output stage and does not require an external pull-up resistor. Its active-low RESET pin drives high actively when deasserted, simplifying design and improving noise immunity compared to open-drain supervisors like TLV803E.

What is the minimum supply voltage at which TLV809EA30DBZR guarantees correct RESET output behavior?

TLV809EA30DBZR guarantees defined RESET output state down to 0.7 V VDD (VPOR = 700 mV). Below this voltage, the output becomes undefined - a critical feature for reliable operation during deep brownouts or slow power ramps in battery-backed systems.

How long does TLV809EA30DBZR hold RESET asserted after VDD recovers above the threshold?

TLV809EA30DBZR holds RESET asserted for a fixed 200 ms delay (variant A) after VDD rises above the rising threshold V_IT+ (≈3.015 V). This delay is factory-set, temperature-stable, and independent of external components, ensuring predictable system initialization timing.

Is TLV809EA30DBZR compatible with the pinout of legacy MAX809 devices?

Yes, TLV809EA30DBZR is pin-to-pin compatible with MAX809/803/810 in SOT-23-3 (DBZ) packages per TI documentation. It shares identical pin 1 = GND, pin 2 = RESET, pin 3 = VDD assignment, enabling drop-in replacement without PCB modification.