Texas Instruments TLV810SDBZR

Overview

TLV810SDBZR from Texas Instruments is a 3-pin voltage supervisor IC with active-high, push-pull RESET output, precision 2.93 V threshold voltage (V_IT–), 200 ms fixed reset delay time (t_d), and 9 µA typical supply current (I_DD). It monitors 3.3 V power rails in microcontroller-based systems to ensure reliable power-on initialization and brownout recovery.

For engineers reviewing the TLV810SDBZR datasheet, TLV810SDBZR pinout, TLV810SDBZR application, or TLV810SDBZR equivalent, key selection criteria include its SOT-23-3 package compatibility, –40°C to +125°C operating range, push-pull output drive capability, and precise 2.93 V trip point for 3.3 V LDO-supplied DSPs and MCUs.

Technical Context

The TLV810SDBZR integrates an internal 1.137 V reference, comparator, oscillator-based timer, and push-pull output stage. Its reset assertion begins at V_DD ≥ 1.1 V and remains active until V_DD exceeds 2.93 V with hysteresis of 40 mV, after which the 200 ms delay timer initiates before deasserting RESET.

It features built-in transient rejection on V_DD, supports bidirectional MCU reset pins via external series resistor, and requires no external components-only a 0.1 µF ceramic bypass capacitor near V_DD/GND for optimal threshold stability.

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 TLV810SDBZR, TLV809SDBZR adds board-level component count and reduces noise immunity on the reset line, while MAX810SUS+T sacrifices thermal robustness and quiescent current efficiency-making TLV810SDBZR the optimal choice for high-reliability 3.3 V systems demanding low power and wide temperature support.

Availability

TLV810SDBZR is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, notebook system management units, and microcontroller power sequencing applications requiring stable component supply across extended temperature ranges.

Supply support for TLV810SDBZR 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, engineered specifically for reliable power-on reset and brownout protection in space-constrained, low-power microcontroller and DSP systems.

FAQ

What is the exact threshold voltage of TLV810SDBZR and how tightly is it specified?

The TLV810SDBZR has a nominal threshold voltage (V_IT–) of 2.93 V, with a guaranteed range of 2.87 V to 2.99 V over temperature and process variation. This 2.93 V rating is factory-trimmed and applies specifically to the TLV810S variant-distinct from TLV810R (2.64 V), TLV810M (4.38 V), and TLV810Z (2.25 V). The 40 mV hysteresis further ensures stable switching behavior during supply fluctuations.

Does TLV810SDBZR require any external components to function correctly?

No, TLV810SDBZR operates autonomously with no external timing or bias components required. However, TI strongly recommends placing a 0.1 µF ceramic capacitor between VDD and GND, as close as possible to the device pins, to stabilize the internal reference and suppress high-frequency noise that could affect threshold accuracy. This capacitor is essential for meeting datasheet performance specifications.

Can TLV810SDBZR drive a bidirectional MCU reset pin directly?

TLV810SDBZR can interface with bidirectional reset pins, but TI recommends adding a 47 kΩ series resistor between its RESET output and the MCU reset pin to prevent contention current when both devices attempt to drive the line simultaneously. This configuration-shown in Figure 14-3 of the TLV810 datasheet-protects both the TLV810SDBZR output stage and the MCU I/O structure during reset assertion and release transitions.

What is the minimum valid VDD voltage for TLV810SDBZR to assert a defined RESET output?

TLV810SDBZR begins asserting a valid RESET signal when VDD rises above 1.1 V. Below this voltage, the output state is undefined. Once VDD exceeds 1.1 V, the device monitors for crossing the 2.93 V threshold and initiates the 200 ms delay timer only after VDD surpasses that level. This 1.1 V turn-on point enables early supervision during very slow power ramps, such as those seen in energy-harvesting systems.

How does TLV810SDBZR handle fast voltage transients on the VDD pin?

TLV810SDBZR incorporates built-in transient rejection logic that ignores short-duration, low-amplitude VDD glitches. As shown in Figure 14-1 and quantified in Figure 13-5 of the datasheet, it only triggers reset for transients whose amplitude and duration jointly exceed the curve-defined boundary-preventing spurious resets from ESD or switching noise while maintaining responsiveness to genuine brownout events.