Texas Instruments TLV810RDBZT

Overview

TLV810RDBZT from Texas Instruments is a 3-pin voltage supervisor IC with active-high push-pull RESET output, precision 2.64 V threshold voltage (V_IT–), 200 ms fixed reset delay time, and 9 µA typical supply current. It monitors VDD in microcontroller-based systems, asserts RESET below threshold, and ensures reliable power-on initialization for DSPs and embedded controllers operating from 1.1 V to 6 V.

For engineers reviewing the TLV810RDBZT datasheet, TLV810RDBZT pinout, TLV810RDBZT application, or TLV810RDBZT equivalent, this device serves as a low-power, temperature-stable (–40°C to +125°C) reset supervisor for battery-powered equipment, automotive ECUs, and industrial microprocessor systems requiring precise undervoltage detection and glitch-immune timing.

Technical Context

The TLV810RDBZT integrates an internal 1.137 V reference, comparator, oscillator-based timer, and push-pull output stage. Its reset assertion logic triggers when VDD falls below 2.64 V (±3% over temperature), with 35 mV hysteresis to prevent chatter during slow supply ramps.

Power-up reset validity begins at VDD ≥ 1.1 V; no external components are required. The device rejects fast transients via built-in VDD transient rejection circuitry-only transients exceeding duration/amplitude thresholds defined in Figure 13-5 trigger reset.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package: 1.12 mm max height, 2.80 mm × 1.40 mm footprint, gull-wing leads, RoHS-compliant NIPDAUAG finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV810RDBZT, TLV809RDBZT trades push-pull drive for open-drain flexibility at the cost of added component count, while MAX810RUR-T offers lower threshold tolerance but sacrifices automotive temperature range and doubles supply current-making TLV810RDBZT optimal for high-reliability, low-power, extended-temperature designs.

Availability

TLV810RDBZT is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, portable medical sensors, smart energy meters, and battery-powered wireless gateways requiring stable component supply across extended temperature ranges.

Supply support for TLV810RDBZT 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 with emphasis on reliability, longevity, and automotive-grade qualification.

The TLV810 family is part of TI's precision voltage supervisor product line, engineered specifically for robust power-on reset and undervoltage monitoring in safety-critical embedded systems operating across –40°C to +125°C.

FAQ

What is the exact reset threshold voltage of the TLV810RDBZT?

The TLV810RDBZT has a guaranteed negative-going input threshold voltage (V_IT–) of 2.64 V, with min/max values of 2.58 V and 2.70 V respectively across –40°C to +125°C. This value is factory-trimmed and specified in Section 9 of the datasheet under ELECTRICAL CHARACTERISTICS. The 2.64 V threshold makes TLV810RDBZT ideal for supervising standard 3.3 V rails with margin for ripple and tolerance stack-up.

Does the TLV810RDBZT require external components for basic operation?

No, the TLV810RDBZT operates autonomously with only VDD, GND, and RESET connections. A 0.1 µF ceramic capacitor is recommended near VDD/GND for noise immunity, but it is not required for functional reset generation. The internal reference, comparator, timer, and push-pull driver are fully integrated-no resistors, capacitors, or external timing elements are needed for TLV810RDBZT to deliver its 200 ms reset delay and 2.64 V threshold detection.

How does the TLV810RDBZT behave during power-up when VDD rises slowly?

During slow VDD ramp-up, TLV810RDBZT asserts RESET low until VDD exceeds 1.1 V, then monitors for crossing 2.64 V. Once VDD ≥ 2.64 V, a 200 ms internal timer starts; RESET remains low until timeout completes. If VDD dips below 2.64 V before timeout, the timer resets and restarts. This behavior ensures TLV810RDBZT guarantees minimum 200 ms reset assertion after stable threshold crossing, regardless of ramp rate-critical for reliable microcontroller initialization.

Can the TLV810RDBZT be used with microcontrollers that have bidirectional reset pins?

Yes, but a series resistor (e.g., 47 Ω) must be placed between TLV810RDBZT's RESET pin and the microcontroller's bidirectional reset pin to prevent contention when both devices attempt to drive the line. Section 14.3 of the datasheet explicitly recommends this configuration. Without the resistor, excessive current could flow during simultaneous drive, risking damage or metastability-so proper interfacing is essential for TLV810RDBZT integration with bidirectional reset-capable MCUs.

What is the maximum supply voltage the TLV810RDBZT can withstand?

The TLV810RDBZT has an absolute maximum VDD rating of 7 V, but TI specifies a recommended maximum operating voltage of 6 V per Section 8 (RECOMMENDED OPERATING CONDITIONS). Continuous operation at 7 V is limited to ≤1000 hours to ensure long-term reliability. For sustained use, TLV810RDBZT should be operated within 1.1 V to 6 V-covering common 3.3 V and 5 V systems while maintaining parametric performance and lifetime assurance.