Texas Instruments TLV803EA30DBZR

Overview

TLV803EA30DBZR from Texas Instruments is an open-drain, active-low voltage supervisor IC designed for reliable power-on reset and brownout detection in ultra-low-power systems. It features a 3.0 V factory-programmed threshold (±0.5% typical accuracy), 200 ms fixed reset delay, 250 nA typical supply current, and operates across –40°C to +125°C. It ensures valid reset assertion down to 0.7 V VDD and is used in battery-powered microcontroller systems requiring precise, low-quiescent supervision.

For engineers reviewing the TLV803EA30DBZR datasheet, TLV803EA30DBZR pinout, TLV803EA30DBZR application, or TLV803EA30DBZR equivalent, key selection criteria include its open-drain output topology requiring external pull-up, guaranteed operation at 0.7 V VDD, ±0.5% threshold accuracy over temperature, 200 ms reset timeout, and SOT-23-3 (DBZ) package with pin 1 = RESET.

Technical Context

The TLV803EA30DBZR implements a precision bandgap-referenced comparator with built-in hysteresis (VHYS ≈ 1.2% of VIT–) to prevent chatter during slow-rising or noisy supply ramps. Its internal timer enforces a fixed 200 ms reset assertion window after VDD crosses above VIT+ (i.e., VIT– + VHYS), independent of external RC components.

Glitch immunity is achieved via a dedicated digital filter rejecting transients <10 µs duration on VDD - critical for noisy DC/DC outputs or shared rails. The device guarantees defined logic state (RESET low) for VDD ≥ 0.7 V and remains functional across full industrial temperature range without derating.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = RESET, pin 2 = GND, pin 3 = VDD - matches industry-standard footprint and soldering profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EA29DBZR, TLV803EA30DBZR offers a more robust 3.0 V trip point for standard 3.3 V rails, while TPS3809K33DBVR trades ultra-low power for push-pull convenience - making TLV803EA30DBZR optimal for long-life, space-constrained, open-drain-bus systems.

Availability

TLV803EA30DBZR is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered IoT sensor nodes, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.

Supply support for TLV803EA30DBZR 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 connectivity solutions with emphasis on reliability, efficiency, and design enablement.

The TLV803E series belongs to TI's precision low-power supervisor portfolio, engineered specifically for battery-critical and thermally demanding applications where sub-µA quiescent current, high accuracy, and wide temperature operation are mandatory.

FAQ

What is the exact reset threshold voltage of TLV803EA30DBZR?

The TLV803EA30DBZR has a factory-programmed falling threshold voltage (V_IT–) of 3.0 V with ±0.5% typical accuracy over –40°C to +125°C. This value is laser-trimmed during production and does not require external resistors. The rising threshold (V_IT+) is V_IT– plus hysteresis (~1.2% of V_IT–), ensuring noise immunity during supply recovery. TLV803EA30DBZR maintains this specification across its full operating voltage range (0.7 V to 6 V).

Does TLV803EA30DBZR require an external pull-up resistor?

Yes, TLV803EA30DBZR uses an open-drain active-low output and requires an external pull-up resistor to the desired logic voltage (e.g., 1.8 V, 3.3 V, or 5 V). Typical values range from 4.7 kΩ to 100 kΩ depending on rise time and bus loading requirements. Unlike push-pull variants (e.g., TLV809E), TLV803EA30DBZR cannot drive high actively - the pull-up defines the high-state voltage and current sourcing capability.

What is the reset delay time for TLV803EA30DBZR and how is it implemented?

The TLV803EA30DBZR provides a fixed 200 ms reset delay (t_D), specified as 130 ms (min) to 270 ms (max) over temperature. This delay is internally generated and does not rely on external RC networks. It begins timing after VDD rises above V_IT+ and holds RESET low for the full duration, ensuring reliable initialization of downstream logic. TLV803EA30DBZR's t_D is consistent across all operating conditions and requires no calibration.

Can TLV803EA30DBZR operate below 1.0 V VDD?

Yes, TLV803EA30DBZR is fully specified down to 0.7 V VDD and guarantees valid RESET assertion (low) when VDD falls below 3.0 V, even at 0.7 V. However, its power-on-reset voltage (V_POR) is 700 mV - below this, the output state is undefined. This capability enables TLV803EA30DBZR to supervise deeply discharged batteries or ultra-low-voltage subsystems where other supervisors fail to function.

Is TLV803EA30DBZR pin-compatible with legacy MAX803 devices?

Yes, TLV803EA30DBZR is explicitly designed as a pin-to-pin compatible upgrade for MAX803L, MAX803M, and APX803 series in SOT-23-3 (DBZ) packages. It retains identical pinout (pin 1 = RESET, pin 2 = GND, pin 3 = VDD), same footprint, and mechanical compatibility. TLV803EA30DBZR improves upon MAX803 with lower I_DD (250 nA vs. ~10 µA), tighter threshold accuracy (±0.5% vs. ±2.5%), and extended temperature range (–40°C to +125°C vs. –40°C to +85°C).