Texas Instruments TLV809J25DBVT

Overview

TLV809J25DBVT from Texas Instruments is a 3-pin push-pull supply voltage supervisor IC designed for undervoltage monitoring and power-on reset generation in microcontroller, DSP, and FPGA systems. It features a precise 2.25 V threshold voltage (±0.05 V), 200 ms fixed reset delay, 9 µA typical supply current, and operates across –40°C to +85°C. It is used in battery-powered equipment and industrial control systems requiring reliable power sequencing.

For engineers reviewing the TLV809J25DBVT datasheet, TLV809J25DBVT pinout, TLV809J25DBVT application, or TLV809J25DBVT equivalent, key selection considerations include its fixed 2.25 V detection threshold, push-pull RESET output, SOT-23 (DBV) package compatibility, and absence of external timing components.

Technical Context

The TLV809J25DBVT integrates an internal 1.137 V reference, comparator, oscillator-based timer, and push-pull output stage. Its reset assertion occurs when VDD falls below 2.25 V (VIT–), with 30 mV hysteresis to prevent chatter during slow supply ramps.

During power-up, RESET remains active until VDD exceeds 2.25 V and sustains a 200 ms (typical) delay before deassertion - ensuring stable core initialization. The device enters high-impedance state only below 1.1 V VDD; above that, it actively monitors and asserts RESET low on undervoltage events.

Key Specifications

Pinout & Package

SOT-23 (DBV) package: 2.90 mm × 1.60 mm body, 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 supervision applications.

Compared with MAX809TRD25+T, TLV809J25DBVT delivers lower power and wider delay tolerance; versus TLV809K33DBVT, it provides accurate 2.25 V detection essential for 2.5 V domain integrity - neither offers drop-in replacement without electrical or layout review.

Availability

TLV809J25DBVT is available at Aetrix Electronics and suitable for factory automation, portable equipment, and electricity metering applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for TLV809J25DBVT 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 expertise in precision analog ICs and industrial-grade reliability.

The TLV809 family was engineered specifically for cost-sensitive, space-constrained embedded systems needing dependable power-on reset and brownout protection - emphasizing low quiescent current, fixed timing, and SOT-23 simplicity.

FAQ

What is the exact threshold voltage of the TLV809J25DBVT?

The TLV809J25DBVT has a guaranteed negative-going input threshold voltage (VIT–) of 2.25 V, with a tolerance of ±0.05 V over the full operating temperature range (–40°C to +85°C). This value is laser-trimmed during production and confirmed per Section 7.5 of the official datasheet. The 2.25 V threshold is optimized for monitoring 2.5 V supplies with ~10% headroom.

Does the TLV809J25DBVT require an external pull-up resistor on the RESET pin?

No, the TLV809J25DBVT uses a push-pull output stage for the RESET pin, meaning it actively drives both high and low states. Unlike open-drain supervisors, it does not require an external pull-up resistor - simplifying design and improving noise immunity. This is explicitly stated in the Pin Functions table (Pin 2 description) and Section 8.3.2 of the datasheet.

What is the reset delay time of the TLV809J25DBVT, and is it adjustable?

The TLV809J25DBVT has a fixed internal reset delay time (t_d) of 200 ms (typical), with a guaranteed range of 120 ms to 280 ms over temperature and voltage. This delay starts after VDD rises above the 2.25 V threshold and is fully integrated - no external components or configuration pins allow adjustment. The fixed timing eliminates variability from capacitor tolerances or PCB parasitics.

Can the TLV809J25DBVT be used with a 3.3 V supply rail?

Yes, the TLV809J25DBVT supports supply voltages from 2 V to 6 V per Section 7.3, so it operates reliably with a 3.3 V VDD. However, its 2.25 V threshold is intended for monitoring 2.5 V rails - using it on 3.3 V would detect only severe undervoltage (≥32% drop), which may be insufficient for system safety. For 3.3 V supervision, TI recommends TLV809K33DBVT (2.93 V threshold).

What package type and marking does the TLV809J25DBVT use?

The TLV809J25DBVT uses the SOT-23 (DBV) package: 3-pin, 2.90 mm × 1.60 mm body size, with lead finish NIPDAU and moisture sensitivity level 1. Its top-side marking is "VTCI", as confirmed in the Package Option Addendum (page ADD-1). The DBV variant is distinct from DBZ (2.92 mm × 1.30 mm) and is not interchangeable without footprint verification.