Texas Instruments TLV810RDBZR

Overview

TLV810RDBZR from Texas Instruments is a precision 3-pin voltage supervisor IC with active-high push-pull RESET output, 2.64 V threshold voltage, 200 ms fixed reset delay, and 9 µA typical supply current. It monitors VDD ≥ 1.1 V and asserts RESET until VDD exceeds VIT– (2.64 V), enabling reliable power-on initialization for microcontrollers in battery-powered industrial systems.

For engineers reviewing the TLV810RDBZR datasheet, TLV810RDBZR pinout, TLV810RDBZR application, or TLV810RDBZR equivalent, key selection criteria include its SOT-23-3 package compatibility, precise 2.64 V trip point, push-pull drive capability, thermal operation up to +125°C, and absence of external components.

Technical Context

The TLV810RDBZR implements an internal bandgap reference (1.137 V) and comparator architecture to detect VDD crossing the 2.64 V threshold. Its reset logic includes a built-in 200 ms timer that starts only after VDD rises above VIT–, ensuring stable deassertion timing independent of ramp rate.

It features hysteresis of 35 mV to prevent chatter during slow VDD transitions and supports bidirectional microcontroller reset pins via series resistor isolation. The device operates without external capacitors and rejects fast transients based on amplitude/duration thresholds defined in its timing diagram.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package: 1.12 mm max height, 2.80–3.04 mm length, 1.20–1.40 mm width, 0.95 mm pin pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV810RDBZR, TLV809RDBZR requires external biasing and offers lower noise immunity, while MAX810RUR+T lacks automotive-grade temperature support and draws more quiescent current-making TLV810RDBZR optimal for ruggedized, low-power embedded systems.

Availability

TLV810RDBZR is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and portable medical devices requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TLV810RDBZR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV810 family is part of TI's precision voltage supervisor product line, designed specifically for robust power-on reset and brownout protection in space-constrained, thermally demanding embedded systems.

FAQ

What is the exact reset threshold voltage of the TLV810RDBZR?

The TLV810RDBZR has a guaranteed negative-going input threshold voltage (VIT–) of 2.64 V, with a tolerance of ±0.06 V (2.58 V to 2.70 V) over the full –40°C to +125°C temperature range. This value is factory-trimmed and specified in the Electrical Characteristics table of the official datasheet. The TLV810RDBZR uses this precise threshold to assert RESET when VDD falls below 2.64 V and release it only after VDD rises above that point plus 35 mV hysteresis.

Does the TLV810RDBZR require an external capacitor for reset timing?

No, the TLV810RDBZR does not require any external capacitor for reset timing. Its 200 ms delay is generated by an internal oscillator-based timer that begins counting only after VDD exceeds the 2.64 V threshold. This eliminates timing component variation and PCB area usage. However, a 0.1 µF ceramic bypass capacitor is required between VDD and GND per the datasheet to stabilize the internal reference and ensure threshold accuracy-this is distinct from timing function.

Can the TLV810RDBZR be used with a microcontroller that has a bidirectional reset pin?

Yes, the TLV810RDBZR can interface with bidirectional reset pins, but a series current-limiting resistor (e.g., 47 kΩ as shown in TI's Figure 14-3) must be placed between the TLV810RDBZR RESET output and the MCU pin. This prevents contention if both the TLV810RDBZR and MCU attempt to drive the line simultaneously. The TLV810RDBZR's push-pull output provides strong drive capability, making it well-suited for this configuration when properly isolated.

What is the minimum supply voltage at which TLV810RDBZR output becomes valid?

The TLV810RDBZR output becomes valid when VDD reaches 1.1 V, as stated in the "Power-up reset voltage" parameter in Section 9 of the datasheet. Below 1.1 V, the RESET output state is undefined. This early validity enables brownout detection before the main supply reaches its nominal 2.64 V threshold, allowing the TLV810RDBZR to provide fail-safe reset signaling even during deep undervoltage conditions.

Is the TLV810RDBZR pin-compatible with other members of the TLV810 family?

Yes, all TLV810 variants-including TLV810M, TLV810R, TLV810S, and TLV810Z-are fully pin-compatible in the SOT-23-3 (DBZ) package. They share identical pinout (RESET, VDD, GND), electrical interface, timing behavior, and thermal specifications. The only difference is the factory-set threshold voltage (2.64 V for TLV810RDBZR), allowing direct substitution when the required trip point matches the application's supply rail.