Texas Instruments TLV810ZDBZR

Overview

TLV810ZDBZR from Texas Instruments is a 3-pin SOT-23 voltage supervisor IC with active-high push-pull RESET output, 2.25 V threshold voltage, 200 ms fixed reset delay, and 9 µA typical supply current. It monitors VDD ≥ 1.1 V for valid reset assertion and operates across –40°C to +125°C, serving as a precision power-on reset generator in microcontroller-based embedded systems.

For engineers reviewing the TLV810ZDBZR datasheet, TLV810ZDBZR pinout, TLV810ZDBZR application, or TLV810ZDBZR equivalent, key selection criteria include threshold accuracy (±2.2% over temperature), push-pull drive capability (–4 mA high / 4 mA low), SOT-23-3 package compatibility, and immunity to fast VDD transients per Figure 14-1.

Technical Context

The TLV810ZDBZR integrates an internal 1.137 V reference, comparator, oscillator-based timer, and reset logic to generate a clean, glitch-free active-high RESET signal. Its hysteresis (30 mV) prevents chatter near the 2.25 V threshold, and the 200 ms delay starts only after VDD exceeds VIT– by ≥0.2 V.

No external components are required: the device asserts RESET when VDD falls below 2.25 V or rises above it during power-up, and maintains RESET until the 200 ms timer expires - ensuring reliable initialization of DSPs, MCUs, and FPGAs before firmware execution begins.

Key Specifications

Pinout & Package

SOT-23-3 (DBZ) package: 1.12 mm max height, 2.95 mm × 1.3 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 TLV810ZDBZR, TLV809ZDBZR offers identical electrical behavior and timing, making it a seamless alternative, while MAX810ZTR trades delay consistency and lower quiescent current for reduced timing margin and higher power draw - requiring revalidation in timing-critical systems.

Availability

TLV810ZDBZR is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC modules, portable medical devices, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.

Supply support for TLV810ZDBZR 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, low-power power-on reset generation in space-constrained, thermally demanding embedded systems.

FAQ

What is the exact threshold voltage of the TLV810ZDBZR and how tightly is it specified?

The TLV810ZDBZR has a nominal threshold voltage (VIT–) of 2.25 V, with a guaranteed range of 2.20 V to 2.30 V over the full –40°C to +125°C operating temperature range. This ±2.2% tolerance ensures reliable supervision of 2.5 V supply rails without requiring external calibration or trimming. The device achieves this accuracy using an internal precision voltage divider referenced to a stable 1.137 V bandgap source, as confirmed in Section 9 of the SBVS158A datasheet.

Does the TLV810ZDBZR require any external components to operate correctly?

No, the TLV810ZDBZR requires no external components for basic operation. However, TI strongly recommends placing a 0.1 µF ceramic bypass capacitor between VDD and GND, as stated in Section 9 footnote (2), to stabilize the internal reference and improve noise immunity. This capacitor must be placed close to the DBZ package pins to minimize inductance. All timing, threshold, and output functions are fully integrated - including the 200 ms delay timer and push-pull driver - eliminating the need for resistors, capacitors, or additional ICs.

How does the TLV810ZDBZR behave during power-up and power-down sequences?

During power-up, TLV810ZDBZR asserts RESET when VDD exceeds 1.1 V and holds it active until VDD rises above 2.25 V, then initiates the 200 ms delay before deasserting RESET. During power-down, RESET reasserts immediately when VDD falls below 2.25 V. The output remains undefined only when VDD < 1.1 V. This behavior is explicitly defined in Section 3 (Description) and illustrated in Figure 14-2 (Power-Up Response), ensuring predictable initialization and safe shutdown in microprocessor systems.

Can the TLV810ZDBZR drive a microcontroller's bidirectional reset pin directly?

The TLV810ZDBZR can drive a bidirectional reset pin, but TI recommends adding a series resistor (e.g., 47 kΩ as shown in Figure 14-3) between its RESET output and the MCU's RST pin. This protects against contention current if both the TLV810ZDBZR and MCU attempt to drive the line simultaneously. The push-pull output supports ±4 mA drive strength, but direct connection risks latch-up or excessive current flow in bidirectional configurations - a requirement explicitly addressed in Section 14.3 "Bidirectional Reset Pins" of the datasheet.

Is the TLV810ZDBZR pin-compatible with other members of the TLV810 family?

Yes, all TLV810 variants - including TLV810RDBZR (2.64 V), TLV810SDBZR (2.93 V), TLV810MDBZR (4.38 V), and TLV810ZDBZR (2.25 V) - share identical SOT-23-3 (DBZ) packaging, pinout (RESET/VDD/GND), and electrical interface. They differ only in factory-trimmed threshold voltage and marking code (VOVQ for TLV810Z). This allows drop-in replacement across voltage rails without PCB changes, as confirmed in the "DEVICE FAMILY COMPARISON" table and Package/Ordering Information section of SBVS158A.