Texas Instruments TLV809L30DBZR

Overview

TLV809L30DBZR from Texas Instruments is a 3-pin push-pull supply voltage supervisor IC designed for undervoltage monitoring and power-on reset generation in processor-based systems. It features a fixed 2.64 V detection threshold (V_IT–), 200 ms reset delay (t_d), 9 µA typical supply current, –40°C to +85°C operating temperature range, and SOT-23 (DBZ) package. It is used to ensure reliable startup and brownout protection for DSPs, microcontrollers, and FPGAs.

For engineers reviewing the TLV809L30DBZR datasheet, TLV809L30DBZR pinout, TLV809L30DBZR application, or TLV809L30DBZR equivalent, key selection considerations include its precise 2.64 V threshold, push-pull RESET output with no external pull-up required, 200 ms factory-fixed delay, low quiescent current, and compatibility with 2–6 V supply rails in space-constrained industrial and portable designs.

Technical Context

The TLV809L30DBZR implements a precision bandgap reference and comparator to monitor VDD against a fixed internal threshold of 2.64 V (min 2.58 V, max 2.70 V). Its push-pull RESET output actively drives high or low without external components, eliminating pull-up resistor dependencies.

It incorporates an internal oscillator-based timer that initiates a 200 ms (120–280 ms) delay after VDD rises above V_IT–, ensuring stable system initialization. The device asserts RESET when VDD falls below V_IT– or remains below 1.1 V during power-up, and enters high-impedance state only when VDD < 1.1 V.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body size, 3-pin surface-mount, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809L30DBVR, the TLV809L30DBZR offers tighter package width (1.30 mm) for ultra-compact layouts, while versus MAX809LUR+T it delivers lower system-level component count and guaranteed active-high drive capability-critical for modern low-voltage SoCs with weak internal pull-ups.

Availability

TLV809L30DBZR is available at Aetrix Electronics and suitable for industrial control, smart metering, portable medical devices, and building automation systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for TLV809L30DBZR 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 TLV809 family is part of TI's precision voltage supervisor product line, engineered specifically for reliable power sequencing and reset generation in resource-constrained, wide-temperature embedded systems.

FAQ

What is the exact reset threshold voltage of the TLV809L30DBZR?

The TLV809L30DBZR has a guaranteed negative-going input threshold voltage (V_IT–) of 2.58 V (min), 2.64 V (typ), and 2.70 V (max) over –40°C to +85°C. This 2.64 V nominal threshold is factory-trimmed and optimized for monitoring 3.0 V supply rails with ~10% dropout margin, as confirmed in Section 7.5 of the official TI datasheet SLVSA03F.

Does the TLV809L30DBZR require an external pull-up resistor on the RESET pin?

No, the TLV809L30DBZR does not require an external pull-up resistor because it features a push-pull RESET output stage. Pin 2 (RESET) actively drives high or low depending on VDD status, enabling direct connection to CMOS inputs without additional components-unlike open-drain alternatives such as the TLV803 series.

What is the reset delay time of the TLV809L30DBZR and is it adjustable?

The TLV809L30DBZR provides a fixed internal reset delay time (t_d) of 200 ms (typical), with a guaranteed range of 120–280 ms. This delay starts when VDD rises above the 2.64 V threshold and is non-adjustable-no external capacitors or resistors are needed, simplifying design and improving reliability compared to RC-timed supervisors.

Which package type does the TLV809L30DBZR use and what are its dimensions?

The TLV809L30DBZR uses the SOT-23 (DBZ) package: a 3-pin, surface-mount plastic case measuring 2.92 mm in length, 1.30 mm in width, and 1.02 mm in height (nominal). Its marking code is "BCMZ", and it is rated for moisture sensitivity level 1 with peak reflow at 260°C, per TI's PACKAGE OPTION ADDENDUM.

Can the TLV809L30DBZR monitor supply voltages outside the 3.0 V range?

Yes, the TLV809L30DBZR operates across a 2 V to 6 V supply range and is specified to supervise any rail within that span. While its 2.64 V threshold is optimized for 3.0 V systems, it can also reliably monitor 2.5 V (with margin), 3.3 V (as under-voltage guard), or 5.0 V supplies-as validated in TI's Recommended Operating Conditions (Section 7.3) and Absolute Maximum Ratings (Section 7.1).