Texas Instruments TLV809I50DBVT

Overview

TLV809I50DBVT 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 4.55 V detection threshold (V_IT–), 200 ms reset delay (t_d), 9 µA typical supply current, and operates across –40°C to +85°C. It is used in servers and industrial control systems to ensure reliable DSP/FPGA initialization.

For engineers reviewing the TLV809I50DBVT datasheet, TLV809I50DBVT pinout, TLV809I50DBVT application, or TLV809I50DBVT equivalent, this page delivers verified specifications, SOT-23 package details, functional pin roles, real-world use cases, and two validated alternative parts with technical and application-level distinctions.

Technical Context

The TLV809I50DBVT implements a precision bandgap reference and comparator circuit to monitor VDD against a fixed 4.45–4.65 V negative-going threshold (V_IT–) with 60 mV hysteresis. Its internal oscillator-driven timer initiates a 120–280 ms delay after VDD crosses V_IT–, ensuring stable deassertion of the active-low RESET output.

RESET is a push-pull output capable of sinking 5 mA and sourcing –5 mA, with VOL ≤ 0.3 V at 500 µA and VOH ≥ VDD – 0.2 V at –500 µA. The device asserts RESET when VDD falls below V_IT– or remains below 1.1 V, and enters high-impedance state only during deep under-voltage conditions.

Key Specifications

Pinout & Package

SOT-23 (DBV) package: 3-pin surface-mount, 2.90 mm × 1.60 mm body size, tape-and-reel (250 pcs), RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809K33DBVT and MAX809TRD3+T, the TLV809I50DBVT provides the precise 4.55 V trip point needed for robust 5 V system supervision, lower quiescent current than the MAXIM part, and tighter hysteresis-making it optimal for new industrial and server designs where supply margin and power efficiency are critical.

Availability

TLV809I50DBVT is available at Aetrix Electronics and suitable for servers, industrial PLCs, and smart electricity meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TLV809I50DBVT 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 specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability industrial and computing solutions.

The TLV809 family is part of TI's precision voltage supervisor product line, engineered specifically for reliable power-on reset and undervoltage protection in DSP, FPGA, and microcontroller-based systems operating from 2 V to 6 V rails.

FAQ

What is the exact reset threshold voltage of the TLV809I50DBVT?

The TLV809I50DBVT has a nominal negative-going threshold voltage (V_IT–) of 4.55 V, with guaranteed minimum and maximum values of 4.45 V and 4.65 V across –40°C to +85°C. This threshold is factory-trimmed and does not require external components, making it ideal for 5 V system supervision without resistor networks.

Does the TLV809I50DBVT require an external pull-up resistor on the RESET pin?

No, the TLV809I50DBVT features a push-pull RESET output stage, eliminating the need for an external pull-up resistor. It actively drives high (VOH ≥ VDD – 0.2 V) and low (VOL ≤ 0.3 V at 500 µA), enabling direct connection to CMOS reset inputs without additional components or signal degradation.

What is the reset delay time specification for the TLV809I50DBVT?

The TLV809I50DBVT provides a fixed reset delay time (t_d) of 200 ms (typical), with a guaranteed range of 120–280 ms over temperature and supply voltage. This delay starts after VDD rises above the 4.55 V threshold and ensures sufficient time for power supplies, clocks, and memory to stabilize before releasing the processor from reset.

Can the TLV809I50DBVT be used to monitor a 3.3 V supply?

No-the TLV809I50DBVT is optimized for 5 V systems with a 4.55 V threshold. For 3.3 V supervision, TI specifies the TLV809K33DBVT (2.93 V threshold). Using TLV809I50DBVT on a 3.3 V rail would cause continuous RESET assertion, as the supply never reaches its 4.45 V minimum trip point.

What package and marking does the TLV809I50DBVT use?

The TLV809I50DBVT is supplied in a 3-pin SOT-23 (DBV) package with dimensions 2.90 mm × 1.60 mm and carries the top-side marking "VTBI". It ships in small tape-and-reel format (250 units per reel), RoHS-compliant, with NIPDAU lead finish and MSL Level-1 rating for unlimited floor life at <30°C/60% RH.