Texas Instruments TLV803EA29DBZR

Overview

TLV803EA29DBZR 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 threshold voltage (±0.5% typical accuracy), 200 ms fixed reset delay, 250 nA typical supply current, and operates across –40°C to +125°C - enabling use in battery-powered IoT sensors and industrial edge controllers.

For engineers reviewing the TLV803EA29DBZR datasheet, TLV803EA29DBZR pinout, TLV803EA29DBZR application, or TLV803EA29DBZR equivalent, key selection considerations include its SOT-23-3 (DBZ) package with pin 1 = RESET, open-drain output requiring external pull-up, guaranteed operation down to 0.7 V VDD, and integrated glitch immunity against transients ≥10 µs.

Technical Context

The TLV803EA29DBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical VHYS) to prevent chatter during threshold crossing. Its internal timer enforces a fixed 200 ms reset timeout after VDD rises above VIT+ (2.93 V + hysteresis), ensuring stable processor initialization.

It uses an open-drain output stage compatible with mixed-voltage systems (up to 6 V pull-up), supports manual reset via MR pin (in X2SON only - not present in DBZ variant), and guarantees defined logic state down to VPOR = 0.7 V - critical for low-VDD microcontroller sequencing.

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 TLV803EA29DBZR, TLV803EA29DBVT demands PCB revision due to inverted pinout, while MAX803SUR29+T trades 6.4× higher quiescent current and 40°C reduced thermal range for broader distributor availability - making TLV803EA29DBZR optimal for high-reliability, battery-constrained, extended-temperature deployments.

Availability

TLV803EA29DBZR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering modules, and portable medical monitors requiring stable component supply across long production lifecycles.

Supply support for TLV803EA29DBZR 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 industrial and automotive ICs.

The TLV803E series belongs to TI's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset functionality in battery-operated and thermally demanding applications.

FAQ

What is the exact reset threshold voltage of the TLV803EA29DBZR?

The TLV803EA29DBZR has a factory-programmed falling threshold voltage (V_IT–) of 2.93 V with ±0.5% typical accuracy over –40°C to +125°C. This value is laser-trimmed during production and specified in TI's SLVSES2J datasheet Section 7.5. The rising threshold (V_IT+) equals V_IT– plus hysteresis (1.2% typical), ensuring noise-immune release behavior. TLV803EA29DBZR does not support adjustable thresholds.

Does the TLV803EA29DBZR support manual reset (MR) functionality?

No, the TLV803EA29DBZR in SOT-23-3 (DBZ) package does not include a manual reset (MR) pin. MR is only available on the 5-pin X2SON (DPW) variant per Table 6-1 of the datasheet. The DBZ package has only three terminals: RESET, GND, and VDD. TLV803EA29DBZR relies solely on VDD monitoring and automatic reset assertion/release.

What pull-up resistor value is recommended for the open-drain RESET output of TLV803EA29DBZR?

A 10 kΩ pull-up resistor to the target logic voltage (e.g., 3.3 V or 5 V) is specified in TI's datasheet for characterization and recommended for general use. This value balances rise time (with 10 pF load, t_r ≈ 100 ns) and power consumption (0.33 mW at 3.3 V). Values from 4.7 kΩ to 100 kΩ are acceptable depending on bus capacitance and speed requirements - TLV803EA29DBZR output can sink ≥2 mA.

Can TLV803EA29DBZR operate reliably at 1.8 V supply voltage?

Yes, TLV803EA29DBZR functions correctly at 1.8 V - well above its 0.7 V VPOR minimum. At 1.8 V, it maintains full specification compliance: 2.93 V threshold detection remains valid (VDD > V_IT–), reset delay stays at 200 ms, and supply current is ~0.3 µA. However, output low voltage (V_OL) is specified at ≤300 mV with 500 µA sink, ensuring clean logic-low assertion into standard CMOS inputs.

Is TLV803EA29DBZR pin-compatible with older MAX803 variants?

TLV803EA29DBZR is pin-to-pin compatible with MAX803SUR29+T in the SOT-23-3 package per TI's documentation (Section 1 Features), sharing identical pin 1 (RESET), pin 2 (GND), pin 3 (VDD) assignment and open-drain active-low topology. However, differences in VPOR (0.7 V vs. 1.0 V), I_DD (250 nA vs. 1.6 µA), and temperature range (–40°C to +125°C vs. –40°C to +85°C) require validation in the target application before substitution.