Texas Instruments TLV810MDBZR

Overview

TLV810MDBZR from Texas Instruments is a 3-pin SOT-23 voltage supervisor IC with active-high push-pull RESET output, 4.38 V threshold voltage (V_IT–), 200 ms fixed reset delay time, and 9 µA typical supply current. It monitors 5 V supply rails in microcontroller-based systems and ensures reliable power-on reset for automotive and industrial embedded applications.

For engineers reviewing the TLV810MDBZR datasheet, TLV810MDBZR pinout, TLV810MDBZR application, or TLV810MDBZR equivalent, this device serves as a precision supply-voltage monitor for DSP/microcontroller initialization, offering temperature-stable threshold behavior (–40°C to +125°C), low-power operation, and no external component requirements.

Technical Context

The TLV810MDBZR integrates an internal 1.137 V reference, comparator, oscillator-based timer, and push-pull output driver. Its reset assertion begins when V_DD exceeds 1.1 V, and it holds RESET active until V_DD rises above 4.38 V and remains stable for 200 ms.

Voltage hysteresis of 60 mV prevents chatter during brownout recovery, and transient rejection is built-in for fast V_DD glitches. The device operates across 1.1 V to 6 V supply range and delivers valid output only when V_DD ≥ 1.1 V.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package, 1.12 mm max height, JEDEC TO-236 compliant, with gull-wing leads and pin 1 index area marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV810MDBZR, TLV809MDBZR adds design flexibility for shared reset buses but increases component count, while MAX810MUR+T offers legacy compatibility at the expense of thermal robustness and quiescent power efficiency.

Availability

TLV810MDBZR is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical patient monitor mainboards requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV810MDBZR 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 communications markets.

The TLV810 family is part of TI's precision voltage supervisor product line, engineered specifically for reliable power-on reset and supply monitoring in processor-centric systems where timing accuracy and low-power operation are critical.

FAQ

What is the exact threshold voltage of TLV810MDBZR and how is it trimmed?

The TLV810MDBZR has a factory-trimmed negative-going input threshold voltage (V_IT–) of 4.38 V (min 4.28 V, max 4.48 V) at +25°C. This value is set by an internal precision voltage divider and reference circuit, with no external adjustment possible. The 60 mV hysteresis ensures stable transition behavior during supply recovery, and threshold drift over temperature is characterized to ±1% across –40°C to +125°C per TI SBVS158A data sheet Figure 13-4.

Does TLV810MDBZR require any external components for basic operation?

No, TLV810MDBZR requires zero external components for core supervision functionality. Its internal oscillator, reference, comparator, and push-pull driver enable standalone operation. However, TI recommends placing a 0.1 µF ceramic bypass capacitor near the VDD and GND pins to minimize noise coupling and ensure threshold stability, especially in electrically noisy environments like automotive or industrial settings.

Can TLV810MDBZR drive a microcontroller's bidirectional RESET pin directly?

TLV810MDBZR can drive a bidirectional RESET pin, but TI recommends adding a series current-limiting resistor (e.g., 47 Ω) between its RESET output and the MCU pin to prevent contention if both devices attempt to drive the line simultaneously. This protects against excessive current flow and potential latch-up, as documented in Section 14.3 of the SBVS158A datasheet.

What is the minimum supply voltage at which TLV810MDBZR asserts a valid RESET signal?

TLV810MDBZR begins asserting RESET when V_DD rises above 1.1 V, and the RESET output becomes fully valid (VOH ≥ V_DD – 0.2 V) at that point. Below 1.1 V, the output state is undefined. This early activation supports robust reset generation even during slow-ramping or low-headroom power supplies, as confirmed in Section 9 Electrical Characteristics and Figure 14-2 of the datasheet.

How does TLV810MDBZR handle fast voltage transients on the VDD pin?

TLV810MDBZR incorporates built-in transient rejection logic that ignores short-duration, low-amplitude V_DD glitches. As shown in Figure 13-5 and described in Section 14.1, only transients exceeding both amplitude and duration thresholds-specifically those lying above the curve defined by V_DD – V_IT– versus pulse width-will trigger a reset. This prevents spurious resets from switching noise or EMI without compromising response to genuine brownouts.