Texas Instruments TLV809EA29DBZR

Overview

TLV809EA29DBZR 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 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. It is used in battery-powered microcontrollers, FPGA configuration circuits, and industrial sensor nodes requiring robust supply monitoring.

For engineers reviewing the TLV809EA29DBZR datasheet, TLV809EA29DBZR pinout, TLV809EA29DBZR application, or TLV809EA29DBZR equivalent, key selection criteria include its guaranteed reset assertion down to 0.7 V VDD, glitch immunity (10 µs), SOT-23-3 (DBZ) package with pin 1 = RESET, and compatibility with legacy MAX809/TPS3809 designs.

Technical Context

The TLV809EA29DBZR integrates a precision bandgap reference, comparator with hysteresis (1.2% typical), and a monostable timer to generate a fixed 200 ms reset pulse after VDD rises above the 2.93 V falling threshold (VIT–). Its push-pull output drives low without external pull-up, eliminating BOM cost and layout dependency.

It delivers guaranteed operation from 0.7 V to 6 V VDD, supports manual reset via MR pin (in X2SON only - not present in DBZ variant), and includes built-in 10 µs glitch immunity to reject fast transients on the supply rail - critical for noisy industrial or automotive environments.

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 - standard pinout compatible with MAX809 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD2+T and TPS3809K33DBVR, the TLV809EA29DBZR provides superior low-voltage operation (0.7 V VPOR), lower leakage, and broader temperature support - making it optimal for next-generation battery and automotive applications where reliability at extremes is non-negotiable.

Availability

TLV809EA29DBZR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, FPGA configuration circuits, and smart meter power supplies requiring stable component supply across long production lifecycles.

Supply support for TLV809EA29DBZR 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 over 50 years of innovation in power management and signal chain technologies.

The TLV809EA29DBZR belongs to TI's TLV80xE family of ultra-low-power voltage supervisors, engineered specifically for battery-constrained and thermally demanding applications where precision, longevity, and robustness are critical.

FAQ

What is the minimum supply voltage at which TLV809EA29DBZR guarantees a valid reset output?

The TLV809EA29DBZR guarantees a controlled reset output down to 0.7 V VDD (VPOR = 700 mV), meaning it will assert RESET reliably even during deep brownout or ultra-low-voltage startup - a key advantage over legacy supervisors like MAX809 that specify only 1.0 V minimum. This capability is confirmed in Section 7.5 of the official datasheet.

Does TLV809EA29DBZR require an external pull-up resistor on the RESET pin?

No, TLV809EA29DBZR does not require an external pull-up resistor because it features a push-pull, active-low output stage. Unlike open-drain variants (e.g., TLV803E), the TLV809EA29DBZR actively drives both high and low states - simplifying design and reducing BOM count. This is explicitly stated in the "Output topology" section of the datasheet.

What is the exact reset delay time for TLV809EA29DBZR, and how is it implemented?

The TLV809EA29DBZR has a fixed 200 ms reset delay (variant A), defined as the time RESET remains asserted after VDD rises above the rising threshold (VIT+ = VIT– + VHYS). This delay is internally generated via a precision RC timer and is stable across temperature (±3% variation from –40°C to +125°C), as verified in Figure 7-21 of the datasheet.

Is TLV809EA29DBZR pin-compatible with MAX809?

Yes, TLV809EA29DBZR is pin-to-pin compatible with MAX809 in the SOT-23-3 (DBZ) package: pin 1 = RESET, pin 2 = GND, pin 3 = VDD. The datasheet explicitly states "Pin-to-pin compatible with MAX803/809/810", and the functional block diagram and pinout diagrams confirm identical terminal mapping and electrical behavior.

What is the threshold voltage accuracy of TLV809EA29DBZR over temperature?

The TLV809EA29DBZR offers ±0.5% typical threshold accuracy over the full –40°C to +125°C operating range, with worst-case deviation bounded at ±2% (min/max). This is confirmed in Table 7-1 (Electrical Characteristics) and visually validated in Figure 7-10 (VIT– Accuracy vs. Temperature), making it suitable for precision 3.3 V rail monitoring without calibration.