Texas Instruments TLV810EA29DBZR

Overview

TLV810EA29DBZR from Texas Instruments is a push-pull, active-high voltage supervisor IC designed for reliable power-on reset and brownout detection in low-power embedded systems. It features a 2.93 V factory-programmed threshold (±0.5% typical accuracy), 200 ms fixed reset delay, 250 nA typical supply current, and guaranteed operation down to 0.7 V VDD - enabling robust supervision in battery-powered microcontrollers and FPGA power rails.

For engineers reviewing the TLV810EA29DBZR datasheet, TLV810EA29DBZR pinout, TLV810EA29DBZR application, or TLV810EA29DBZR equivalent, key selection criteria include its active-high output logic, SOT-23-3 (DBZ) package with pin 1 = GND, VPOR of 900 mV, ±0.5% threshold accuracy over –40°C to +125°C, and immunity to sub-10 µs VDD transients.

Technical Context

The TLV810EA29DBZR implements a precision bandgap-referenced comparator with built-in hysteresis (1.2% typical) to prevent chatter during slow-rising or noisy supply ramps. Its internal timer enforces a precise 200 ms reset assertion window after VDD crosses above the rising threshold (VIT+ = VIT– + VHYS), ensuring sufficient hold time for system initialization.

Unlike open-drain variants, this device uses push-pull output topology - eliminating external pull-up requirements and delivering rail-to-rail VOH (≥0.8×VDD) and VOL (≤300 mV at 500 µA sink) across its full 1.7–6 V operating range, making it suitable for direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 2.90 mm × 1.30 mm body size, with pin 1 = GND (confirmed per Figure 6-1 and Device Nomenclature).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV810EA29DBZR, TLV809EA29DBZR provides identical supervision accuracy and timing but inverted logic polarity, while MAX809TRD29+T trades nanoamp IQ and extended temperature for broader legacy compatibility and lower unit cost in non-harsh environments.

Availability

TLV810EA29DBZR is available at Aetrix Electronics and suitable for electricity meters, factory automation controllers, and portable medical sensors requiring stable component supply, long-term lifecycle support, and guaranteed nanoamp-level quiescent current performance.

Supply support for TLV810EA29DBZR 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 over 50 years of innovation in high-reliability IC design.

The TLV810EA29DBZR belongs to TI's TLV80xE/81xE voltage supervisor family, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-constrained and thermally demanding applications - emphasizing nanoscale IQ, factory-trimmed thresholds, and robust glitch immunity.

FAQ

What is the exact reset threshold voltage of TLV810EA29DBZR and how accurate is it?

The TLV810EA29DBZR 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. Measured data (Figure 7-9) confirms threshold drift remains within ±0.5% across temperature, making TLV810EA29DBZR suitable for precision brownout detection in mission-critical systems where supply tolerance margins are tight.

Does TLV810EA29DBZR require an external pull-up resistor on the RESET pin?

No, TLV810EA29DBZR does not require an external pull-up resistor because it uses a push-pull active-high output topology. The internal driver sources current to assert RESET high when VDD falls below 2.93 V and sinks current to drive RESET low after the 200 ms delay expires. This eliminates board space, BOM cost, and potential noise coupling associated with external resistors - a key differentiator from open-drain variants like TLV803E.

What is the minimum supply voltage at which TLV810EA29DBZR guarantees correct reset behavior?

TLV810EA29DBZR guarantees a defined active-high RESET output state down to a power-on reset voltage (VPOR) of 900 mV. Below this voltage, the output state is undefined. This 0.9 V VPOR - combined with operation down to 0.7 V VDD - ensures deterministic reset assertion during ultra-low-voltage brownout events, such as those occurring in deeply discharged lithium coin cells or energy-harvesting storage capacitors.

How does the 200 ms reset delay of TLV810EA29DBZR get implemented and is it temperature-stable?

The 200 ms reset delay (variant A) in TLV810EA29DBZR is generated by an internal RC-based timer with process- and temperature-compensated design. Figure 7-20 shows measured tD variation of only ±1.5 ms across –40°C to +125°C, confirming high stability. This eliminates need for external timing components and ensures consistent boot hold time regardless of ambient conditions - critical for reliable firmware initialization in automotive and industrial deployments.

Is TLV810EA29DBZR pin-compatible with legacy MAX809 or APX809 devices?

Yes, TLV810EA29DBZR is pin-to-pin compatible with MAX809TRD29+T and APX809-29SA-7 in the SOT-23-3 (DBZ) package, sharing identical pin 1 = GND, pin 2 = RESET, pin 3 = VDD layout. However, note that TLV810EA29DBZR provides active-high output versus the active-low output of those legacy parts - requiring verification of host system reset polarity logic before drop-in replacement.