Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Texas Instruments TLV863MDBZT

Name: TLV863MDBZT
Brand: Texas Instruments
SKU: TLV863MDBZT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TLV863MDBZT

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TLV863MDBZT.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:775

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TLV863MDBZT from Texas Instruments is a 3-pin voltage supervisor IC with active-low, open-drain RESET output, designed for power-on reset supervision in processor-based systems. It features a fixed 4.38 V threshold voltage (V_IT–), 200 ms reset delay time (t_d), 9 µA typical supply current, and operates across –40°C to +125°C - used in factory automation and electricity metering where reliable brownout detection is critical.

For engineers reviewing the TLV863MDBZT datasheet, TLV863MDBZT pinout, TLV863MDBZT application, or TLV863MDBZT equivalent, key selection factors include its precise 4.38 V monitoring threshold, SOT-23 (DBZ) 3-pin package compatibility, open-drain output flexibility for level shifting and wired-OR reset bus implementation, and guaranteed operation over extended industrial temperature range.

Technical Context

The TLV863MDBZT implements a precision bandgap reference and internal timer to generate a clean, glitch-free active-low RESET signal during power-up and brownout events. Its negative-going input threshold (V_IT– = 4.38 V) is fixed via internal resistor divider, with 60 mV hysteresis (V_hys) to prevent chatter near threshold.

It asserts RESET when V_DD falls below 4.38 V and holds it low for ≥120 ms (typ. 200 ms, max 280 ms) after V_DD rises above threshold. The device enters high-impedance state below 1.1 V V_DD, enabling safe power-down behavior and compatibility with bidirectional microcontroller reset pins.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage (V_IT–)	4.38 V - precisely monitors 5 V rail for undervoltage; triggers reset if supply drops below this value
Reset Delay Time (t_d)	200 ms (typical) - ensures stable system initialization by holding RESET low long enough for processors and peripherals to fully reset
Supply Current (I_DD)	9 µA (typical at 2 V) - enables ultra-low-power operation in battery-backed or energy-constrained applications
Output Type	Open-drain RESET - supports wired-OR configuration, level shifting up to 6 V, and external pull-up to any logic rail
Operating Temperature	–40°C to +125°C - qualified for harsh industrial environments including building automation and smart meters
Package	SOT-23 (DBZ), 3-pin - compact 2.92 mm × 1.30 mm footprint ideal for space-constrained PCBs
Power-Up Validity	RESET valid above 1.1 V V_DD - guarantees early assertion during ramp-up and graceful release on shutdown

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
VDD	Supply input	Accepts 1.1 V to 6 V; requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin
GND	Ground reference	System ground return path; must be low-impedance connection for accurate threshold sensing
RESET	Open-drain output	Active-low reset signal; requires external 10 kΩ–1 MΩ pull-up resistor; voltage not limited by VDD (supports level shift)

Key Features

Feature	Design Value
Fixed 4.38 V threshold	Accurately supervises 5 V rails without external components; eliminates need for resistor-divider calibration
200 ms reset delay	Guarantees sufficient hold time for full system reset - meets requirements of DSPs, FPGAs, and ASICs
9 µA supply current	Minimizes quiescent load on backup supplies and extends battery life in portable equipment
Open-drain RESET output	Enables multi-supervisor wired-OR reset buses and flexible logic-level interfacing (e.g., 3.3 V MCU monitoring 5 V rail)
–40°C to +125°C operation	Validated for use in uncontrolled ambient environments such as electricity meters and factory floor controllers

Applications

Factory Automation	Electricity Meters
Use Scenario: PLC I/O modules and motor drive controllers require deterministic reset during line voltage sags or grid disturbances. IC Role / Device Role / Timing Role: TLV863MDBZT acts as primary brownout detector, asserting RESET to halt unsafe actuation and initiate controlled recovery sequence. Use Value: 4.38 V threshold matches nominal 5 V auxiliary supply; 200 ms delay prevents nuisance resets from transient dips <100 ms.	Use Scenario: Smart electricity meters operate continuously on AC-derived 5 V rails subject to utility-side fluctuations and lightning-induced transients. IC Role / Device Role / Timing Role: TLV863MDBZT provides fail-safe power-on initialization and brownout protection for metrology SoC and secure bootloader execution. Use Value: 125°C rating ensures reliability inside sealed, thermally isolated meter enclosures; open-drain output interfaces directly to 3.3 V secure element reset pin.
Building Automation	Portable Equipment
Use Scenario: HVAC controllers and lighting gateways deploy in attics, basements, and outdoor junction boxes with wide ambient temperature swings. IC Role / Device Role / Timing Role: TLV863MDBZT supervises 5 V DC-DC output powering MCU and wireless SoC, ensuring robust boot under cold-start conditions. Use Value: –40°C start-up capability and 60 mV hysteresis prevent oscillation during slow VDD ramps in low-temperature environments.	Use Scenario: Handheld test instruments and portable data loggers rely on single-cell Li-ion or alkaline batteries with variable discharge profiles. IC Role / Device Role / Timing Role: TLV863MDBZT monitors regulated 5 V rail derived from boost converter, triggering graceful shutdown before critical brownout. Use Value: 9 µA quiescent current minimizes standby drain; open-drain output allows direct interface to 1.8 V/3.3 V MCU reset pin via pull-up to lower voltage rail.

Factory Automation

Electricity Meters

Use Scenario: PLC I/O modules and motor drive controllers require deterministic reset during line voltage sags or grid disturbances.

IC Role / Device Role / Timing Role: TLV863MDBZT acts as primary brownout detector, asserting RESET to halt unsafe actuation and initiate controlled recovery sequence.

Use Value: 4.38 V threshold matches nominal 5 V auxiliary supply; 200 ms delay prevents nuisance resets from transient dips <100 ms.

Use Scenario: Smart electricity meters operate continuously on AC-derived 5 V rails subject to utility-side fluctuations and lightning-induced transients.

IC Role / Device Role / Timing Role: TLV863MDBZT provides fail-safe power-on initialization and brownout protection for metrology SoC and secure bootloader execution.

Use Value: 125°C rating ensures reliability inside sealed, thermally isolated meter enclosures; open-drain output interfaces directly to 3.3 V secure element reset pin.

Building Automation

Portable Equipment

Use Scenario: HVAC controllers and lighting gateways deploy in attics, basements, and outdoor junction boxes with wide ambient temperature swings.

IC Role / Device Role / Timing Role: TLV863MDBZT supervises 5 V DC-DC output powering MCU and wireless SoC, ensuring robust boot under cold-start conditions.

Use Value: –40°C start-up capability and 60 mV hysteresis prevent oscillation during slow VDD ramps in low-temperature environments.

Use Scenario: Handheld test instruments and portable data loggers rely on single-cell Li-ion or alkaline batteries with variable discharge profiles.

IC Role / Device Role / Timing Role: TLV863MDBZT monitors regulated 5 V rail derived from boost converter, triggering graceful shutdown before critical brownout.

Use Value: 9 µA quiescent current minimizes standby drain; open-drain output allows direct interface to 1.8 V/3.3 V MCU reset pin via pull-up to lower voltage rail.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803MDBZT	Different pinout (VDD/GND/RESET vs. TLV863's VDD/RESET/GND); identical 4.38 V threshold and 200 ms delay	Requires PCB layout change; same functional behavior and thermal specs	Select TLV803MDBZT only if legacy board uses TLV803 pin assignment
TLV853MDBZT	Same pinout as TLV863MDBZT (VDD/RESET/GND); identical electrical specs and package	No layout change required; functionally interchangeable with TLV863MDBZT	TLV853MDBZT is a direct pin-compatible alternative with identical marking and ordering logistics

Compared with TLV803MDBZT, TLV863MDBZT offers matching threshold and timing but different pin order - requiring layout revision. TLV853MDBZT shares identical pinout and specifications, making it a seamless drop-in replacement without design modification.

Availability

TLV863MDBZT is available at Aetrix Electronics and suitable for factory automation, electricity metering, and building automation applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for TLV863MDBZT 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 TLV8x3 family - including TLV863MDBZT - was engineered specifically for high-reliability power supervision in processor-based systems, emphasizing precision threshold accuracy, ultra-low quiescent current, and extended temperature operation.

FAQ

What is the exact threshold voltage of the TLV863MDBZT?

The TLV863MDBZT has a fixed negative-going input threshold voltage (V_IT–) of 4.38 V, with ±0.10 V tolerance over temperature. This value is factory-trimmed and specified in the Electrical Characteristics table of the official TI datasheet SBVS157E. It is designed to supervise nominal 5 V power rails and remains stable across the full –40°C to +125°C operating range.

Does the TLV863MDBZT support level shifting on its RESET output?

Yes, the TLV863MDBZT features an open-drain RESET output that supports level shifting. Its RESET pin can be pulled up to any voltage between 1.8 V and 6 V - independent of V_DD. This allows the TLV863MDBZT to monitor a 5 V rail while driving a 3.3 V or 1.8 V microcontroller reset input using a single external pull-up resistor.

What is the recommended pull-up resistor value for the TLV863MDBZT RESET pin?

Texas Instruments recommends a pull-up resistor between 10 kΩ and 1 MΩ on the TLV863MDBZT RESET pin. A 10 kΩ resistor ensures fast rise time and strong drive into capacitive loads, while a 100 kΩ–470 kΩ value balances speed, power, and noise immunity. The choice depends on bus capacitance and required rise time - values outside this range may compromise timing or increase susceptibility to noise.

Is the TLV863MDBZT pin-compatible with the MAX803?

Yes, the TLV863MDBZT is explicitly stated in TI documentation as pin-for-pin compatible with the MAX803 series. However, note that TLV863MDBZT uses the VDD/RESET/GND pinout (pin 1 = VDD, pin 2 = RESET, pin 3 = GND), whereas standard MAX803 variants use VDD/GND/RESET. Always verify pin mapping against the specific MAX803 variant and consult TI's Device Comparison table before substitution.

How does the TLV863MDBZT behave during power-up below 1.1 V?

Below 1.1 V V_DD, the TLV863MDBZT output stage is disabled and the RESET pin enters a high-impedance state. In this condition, the external pull-up resistor determines the logic level on RESET - typically pulling it high. This behavior prevents undefined states during initial power ramp and ensures safe, predictable startup sequencing for downstream logic.

TLV863MDBZT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.38V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 120ms Minimum

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TLV863MDBZT FAQ

1.How can I place an order for TLV863MDBZT through Aetrix?

Please submit a Request for Quotation (RFQ) for TLV863MDBZT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLV863MDBZT reliable?

The price and inventory of TLV863MDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV863MDBZT is usually 5 days.

3.What payment methods are accepted for TLV863MDBZT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV863MDBZT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLV863MDBZT?

TLV863MDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLV863MDBZT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLV863MDBZT?

For technical support, including TLV863MDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV863MDBZT requirements.

6.How does Aetrix verify that TLV863MDBZT is sourced from the original manufacturer or authorized distributors?

All TLV863MDBZT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLV863MDBZT meets industry standards.

7.What is the process for return or replacement of TLV863MDBZT?

All TLV863MDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TLV863MDBZT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLV863MDBZT part is unused and in its original packaging.

Return procedure for TLV863MDBZT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…