Texas Instruments TLV803EA26DBZR

Overview

TLV803EA26DBZR 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 2.64 V factory-programmed threshold (±0.5% typical accuracy), 250 nA typical supply current, 40 µs fixed reset delay, and guaranteed operation down to 0.7 V VDD - making it ideal for battery-backed microcontrollers and energy-harvesting sensors.

For engineers reviewing the TLV803EA26DBZR datasheet, TLV803EA26DBZR pinout, TLV803EA26DBZR application, or TLV803EA26DBZR equivalent, key selection criteria include its SOT-23-3 (DBZ) package with pin 1 = RESET, open-drain output requiring external pull-up, ±0.5% threshold accuracy over –40°C to +125°C, and glitch immunity against transients ≥10 µs.

Technical Context

The TLV803EA26DBZR implements a precision bandgap-referenced comparator with built-in hysteresis (VHYS ≈ 1.2% of VIT–) to prevent chatter during slow-rising or noisy supply rails. Its internal timer ensures a fixed 40 µs reset assertion window after VDD recovers above VIT+ (2.64 V + VHYS), independent of external RC components.

As a member of the TLV80xE family, it integrates glitch immunity filtering (tGI = 10 µs typical) that rejects fast VDD excursions - critical for automotive body electronics and industrial sensor nodes exposed to load-dump or ESD-induced supply noise.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = RESET (active-low open-drain), pin 2 = GND, pin 3 = VDD - confirmed per TI SLVSES2J Rev J Figure 6-3 (R-pinout variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB26DBZR and MAX803SUR26+T, the TLV803EA26DBZR delivers optimal trade-off for fast-boot, battery-sensitive designs: lowest I_DD, shortest deterministic delay, and open-drain topology enabling voltage-level translation - without sacrificing accuracy or temperature range.

Availability

TLV803EA26DBZR is available at Aetrix Electronics and suitable for electricity meters, portable medical sensors, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to +125°C.

Supply support for TLV803EA26DBZR 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 power management technologies, with decades of expertise in high-reliability supervisory circuits.

The TLV803EA26DBZR belongs to TI's TLV80xE low-power voltage supervisor family, engineered for ultra-low-I_Q operation in battery-constrained and thermally demanding applications such as smart meters, wearables, and automotive body electronics.

FAQ

What is the exact reset threshold voltage of the TLV803EA26DBZR?

The TLV803EA26DBZR has a factory-programmed falling threshold voltage (V_IT–) of 2.64 V with ±0.5% typical accuracy over –40°C to +125°C. This value is laser-trimmed during production and does not require external calibration. The rising threshold (V_IT+) equals V_IT– plus hysteresis (≈1.2% of V_IT–), ensuring stable release without oscillation.

Does the TLV803EA26DBZR require an external pull-up resistor?

Yes, the TLV803EA26DBZR uses an open-drain active-low output and requires an external pull-up resistor on the RESET pin. Typical values range from 10 kΩ to 100 kΩ, selected based on rise-time requirements and bus capacitance. No pull-up is needed for push-pull variants like TLV809E, but it is mandatory for TLV803EA26DBZR to establish a valid high state.

What is the minimum supply voltage at which TLV803EA26DBZR guarantees correct reset behavior?

The TLV803EA26DBZR guarantees defined reset output behavior down to 0.7 V VDD (VPOR). Below this voltage, the output state is undefined. This enables reliable reset assertion during deep brownout conditions - critical for preserving data integrity in microcontrollers powered by depleted batteries or supercapacitors.

Can TLV803EA26DBZR replace MAX803 in existing designs?

TLV803EA26DBZR is pin-to-pin compatible with MAX803 in SOT-23-3 packages and shares identical pin 1 = RESET, pin 2 = GND, pin 3 = VDD assignment. However, it offers superior specs: 250 nA vs. 1.6 µA I_DD, ±0.5% vs. ±2.5% threshold accuracy, and 40 µs vs. 140 ms delay. Layout reuse is possible, but verify pull-up value and timing margins for fast-reset use cases.

Is the TLV803EA26DBZR qualified for automotive applications?

Yes, the TLV803EA26DBZR is specified for operation from –40°C to +125°C and meets AEC-Q100 stress test requirements for Grade 1 temperature range. Its 2.64 V threshold, 40 µs delay, and 10 µs glitch immunity make it suitable for body control units, door modules, and infotainment power sequencing where robustness against cranking transients is essential.