Texas Instruments TLV803EA29VDBZR

Overview

TLV803EA29VDBZR 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 2.93 V factory-programmed threshold (±0.5% typical accuracy), 200 ms fixed reset delay, 250 nA typical supply current at 3.3 V, and guaranteed operation down to 0.7 V VDD - enabling robust supervision in battery-powered microcontrollers, FPGAs, and DSPs.

For engineers reviewing the TLV803EA29VDBZR datasheet, TLV803EA29VDBZR pinout, TLV803EA29VDBZR application, or TLV803EA29VDBZR equivalent, key selection considerations 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, 200 ms reset timeout, and compatibility with legacy MAX803/TPS3809 designs.

Technical Context

The TLV803EA29VDBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical VHYS) to prevent chatter during slow-rising or noisy supply rails. Its internal glitch immunity filter rejects transients <10 µs duration, ensuring reset assertion only occurs for sustained undervoltage events below the 2.93 V falling threshold (VIT–).

Reset release follows a two-stage timing sequence: after VDD rises above VIT+ (2.93 V + hysteresis), the output remains asserted for the full 200 ms delay (tD) before deassertion - independent of VDD slew rate or noise. The device maintains defined logic state down to VPOR = 0.7 V, supporting early-fail-safe initialization in deep-sleep wake-up scenarios.

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 - matches industry-standard pinout for drop-in replacement of MAX803/TPS3809 series.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3809K29DBVR and MAX803SUR29+T, TLV803EA29VDBZR delivers the lowest quiescent current (250 nA), tightest threshold accuracy (±0.5%), and documented 10 µs glitch immunity - making it optimal for battery-constrained, noise-prone, and safety-critical embedded systems.

Availability

TLV803EA29VDBZR is available at Aetrix Electronics and suitable for electricity meters, factory automation sensors, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV803EA29VDBZR 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 for industrial, automotive, and consumer markets.

The TLV803E family was engineered specifically for ultra-low-power, high-accuracy voltage supervision in space-constrained and battery-operated systems - emphasizing sub-µA IQ, wide temperature operation, and robust transient immunity.

FAQ

What is the exact reset threshold voltage of TLV803EA29VDBZR?

The TLV803EA29VDBZR has a factory-programmed falling threshold voltage (VIT–) of 2.93 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 (VIT+) equals VIT– plus hysteresis (1.2% typical), ensuring stable release behavior during supply recovery.

Does TLV803EA29VDBZR require an external pull-up resistor?

Yes, TLV803EA29VDBZR uses an open-drain, active-low output and requires an external pull-up resistor to the target logic rail (e.g., 10 kΩ to 3.3 V). This configuration enables wired-OR reset busing and mixed-voltage interface flexibility. Unlike push-pull variants (e.g., TLV809E), no internal pull-up exists - omission will result in undefined reset signal levels.

What is the guaranteed minimum operating voltage for TLV803EA29VDBZR?

TLV803EA29VDBZR guarantees defined reset behavior down to VPOR = 0.7 V, meaning the output state remains controlled even during ultra-slow power ramp-up or deep brownout conditions. Below 0.7 V, the reset output becomes undefined - a critical design boundary for energy-harvesting and coin-cell applications where supply rise times exceed milliseconds.

How does the 200 ms reset delay of TLV803EA29VDBZR behave across temperature?

The 200 ms reset delay (tD) of TLV803EA29VDBZR is highly stable across temperature, varying only ±3 ms from –40°C to +125°C (197–203 ms). This tight tolerance eliminates need for derating in thermal cycling environments and ensures consistent processor initialization timing in automotive and industrial deployments.

Is TLV803EA29VDBZR pin-compatible with MAX803 series devices?

Yes, TLV803EA29VDBZR uses the SOT-23-3 (DBZ) package with identical pinout (pin 1 = RESET, pin 2 = GND, pin 3 = VDD) and functional equivalence to MAX803SUR29+T. It supports direct replacement without PCB changes, offering improved specs: 250 nA vs. 1.2 µA IQ, ±0.5% vs. ±2.5% threshold accuracy, and documented 10 µs glitch immunity.