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) > Embedded > Microcontrollers

STMicroelectronics ST7FLI15BF1U6

Name: ST7FLI15BF1U6
Brand: STMicroelectronics
SKU: ST7FLI15BF1U6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ST7FLI15BF1U6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 20-VQFN Exposed Pad

Datasheet:: ST7FLI15BF1U6.pdf

Description:: IC MCU 8BIT 4KB FLASH 20QFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,484

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

Product details

Overview

ST7FLI15BF1U6 from STMicroelectronics is an 8-bit Flash microcontroller with 4 KB XFlash program memory, 256 bytes RAM, and 128 bytes data EEPROM. It integrates a 10-bit ADC with op-amp, dual 12-bit auto-reload timers (4 PWM outputs), SPI interface, analog comparator, and enhanced reset/LVD/AVD supply management. Used in low-power industrial sensor nodes requiring precise timing, analog sensing, and robust I/O control.

For engineers reviewing the ST7FLI15BF1U6 datasheet, ST7FLI15BF1U6 pinout, ST7FLI15BF1U6 application, or ST7FLI15BF1U6 equivalent, key selection criteria include its 20-pin SO package, 2.7–5.5 V operation, 8 MHz max CPU frequency (with PLL x4/x8), 7-channel ADC with programmable gain, and 7 high-sink (20 mA) I/O pins for direct LED or relay drive.

Technical Context

The ST7FLI15BF1U6 implements an industry-standard 8-bit ST7 core with 63 instructions, 17 addressing modes, and hardware 8×8 unsigned multiply. Its memory subsystem includes byte-erasable XFlash with ICP/IAP support, 20-year data retention at 55°C, and protected EEPROM with 300K write/erase cycles.

Peripherals are tightly coupled to the core via dedicated registers: dual auto-reload timers feed four independent PWM outputs and input capture; the ADC supports dual-range conversion (13-bit for 0–430 mV, 10-bit for 430 mV–5 V at 5 V_DD); and the analog comparator features interrupt-capable external reference input (COMPIN−) and output (COMPOUT).

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	8-bit ST7 CPU with 63 instructions, 17 addressing modes, and 8×8 unsigned multiply - enables compact, deterministic firmware for real-time control.
Flash Memory	4 KB single-voltage XFlash with ICP/IAP, 10K write/erase cycles, 20-year data retention at 55°C - supports field firmware updates without external programmers.
ADC Resolution	10-bit precision for 430 mV–5 V range; 13-bit for 0–430 mV range (at 5 V_DD) - delivers high-resolution analog sensing across wide input spans without external signal conditioning.
Timers	Dual 12-bit auto-reload timers generating 4 PWM outputs, 1 input capture, and pulse functions - suitable for motor control, LED dimming, and time-critical event triggering.
I/O Capability	17 multifunctional bidirectional I/O lines, including 7 high-sink (20 mA) outputs - drives LEDs, small relays, or logic-level MOSFETs directly without buffer stages.
Supply Range	2.7 V to 5.5 V operating voltage with enhanced LVD/AVD - ensures reliable operation across battery, industrial, and mixed-supply systems.
Clock Sources	Internal 1% RC oscillator (1 MHz), crystal/resonator, external clock, or PLL (x4/x8 for 4/8 MHz) - eliminates need for external crystal in cost-sensitive designs while maintaining timing accuracy.

Pinout & Package

ST7FLI15BF1U6 is housed in a 20-pin Small Outline (SO20 300") package with 0.65 mm pitch, RoHS-compliant, and rated for −40°C to +85°C operation.

Pin/Terminal	Circuit Role	Design Meaning
VDD (Pin 2)	Main power supply	Primary 2.7–5.5 V supply rail; must be decoupled locally to ensure stable core and peripheral operation.
VSS (Pin 1)	Ground reference	Digital ground return path; requires low-impedance connection to system GND plane.
RESET (Pin 3)	Active-low reset input	Asynchronous non-maskable reset; internal pull-up ensures safe startup; external RC network sets reset duration.
PA0/LTIC (Pin 16)	Lite Timer input capture	Captures edge timestamps for pulse-width or period measurement; configured as high-sink I/O by default.
PA2–PA5/ATPWM0–ATPWM3 (Pins 14–13, 11–12)	Auto-reload timer PWM outputs	Four independent PWM channels with configurable duty cycle and frequency - used for motor speed control or LED brightness regulation.
PB0–PB6/AIN0–AIN6 (Pins 4–10)	Analog input / SPI / comparator I/O	Seven ADC channels shared with SPI signals (MOSI/MISO/SCK/SS) and comparator inputs - enables mixed-signal functionality in minimal pin count.
PC0/OSC1 & PC1/OSC2 (Pins 15 & 17)	Crystal/resonator interface	Connects to external 32 kHz–16 MHz crystal or ceramic resonator; internal oscillator circuitry eliminates external capacitors in basic configurations.

Key Features

Feature	Design Value
In-Circuit Programming (ICP)	Enables firmware updates via ICC interface without removing MCU from PCB - reduces production test time and supports post-deployment patches.
Auto Wake-up from Halt Mode	Allows ultra-low-power sleep (µA range) with wake-up triggered by external interrupt or timer event - extends battery life in portable sensor applications.
Programmable Internal Voltage Reference	Provides stable reference for ADC and comparator without external components - improves measurement repeatability across temperature and supply variations.
High-Sink I/O (20 mA)	Seven pins deliver 20 mA sink current directly - eliminates discrete driver transistors for indicators, buzzers, or small solenoids.
Debug Module (DM)	On-chip hardware debug support for In-Circuit Debugging (ICD) - enables real-time register inspection, breakpoint setting, and step-through execution during development.

Applications

Industrial Sensor Node

Smart Lighting Controller

Use Scenario: Standalone temperature/humidity sensor node with local display and wireless uplink.

IC Role / Device Role / Timing Role: Central controller managing ADC sampling, SPI communication with RF module, PWM-driven status LEDs, and low-power sleep scheduling.

Use Value: Integrated 7-channel ADC, 4 PWM outputs, and Auto Wake-up from Halt enable full functionality in one chip with <10 µA standby current.

Use Scenario: Dimmable LED driver board for commercial fixtures with ambient light sensing and thermal monitoring.

IC Role / Device Role / Timing Role: Analog front-end processor converting photodiode and thermistor signals, generating synchronized PWM for multiple LED strings.

Use Value: Dual-range ADC (13-bit for low-light sensing, 10-bit for thermal range) and 4 independent PWM channels eliminate external signal conditioners and timing ICs.

Power Supply Monitor

Appliance Motor Control

Use Scenario: AC-DC adapter with overvoltage, undervoltage, and overtemperature protection.

IC Role / Device Role / Timing Role: Safety monitor interfacing with LVD/AVD circuits, reading isolated voltage/current sensors via ADC, and asserting fault signals via high-sink outputs.

Use Value: Enhanced LVD/AVD with interrupt capability and 20 mA sink outputs allow direct drive of optocouplers or latch circuits without external drivers.

Use Scenario: Brushless DC fan controller with speed feedback, soft-start, and stall detection.

IC Role / Device Role / Timing Role: Real-time motor commutation sequencer using input capture (LTIC/ATIC) for hall sensor edges and PWM outputs for gate drivers.

Use Value: Two auto-reload timers with input capture and 4 PWM outputs provide precise phase-aligned timing for 3-phase commutation without external logic.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ST7FLI19BF1U6	Same package and core; adds analog comparator and increases Flash to 4 KB with extended option byte configuration.	Required when comparator-based zero-crossing detection or enhanced memory security is needed.	Select when analog comparator functionality is mandatory and pin compatibility must be preserved.
STM8S003F3P6	Successor 8-bit MCU with higher clock (16 MHz), enhanced ADC (10-bit, 10 ch), and improved debug (SWIM); different pinout and memory map.	Used in new designs targeting longer product lifecycle, better toolchain support, and higher performance.	Choose for new designs where migration path, active vendor support, and expanded peripherals justify redesign effort.

Compared with ST7FLI15BF1U6, ST7FLI19BF1U6 adds comparator functionality without changing footprint, while STM8S003F3P6 offers modern architecture and tooling but requires PCB and firmware rework - making ST7FLI15BF1U6 optimal for legacy-compatible, cost-sensitive, low-power analog control.

Availability

ST7FLI15BF1U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart lighting controllers, power supply monitors, and appliance motor control systems requiring stable component supply and long-term manufacturability.

Supply support for ST7FLI15BF1U6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive semiconductors.

The ST7LITE1xB series was developed for cost-sensitive, low-power embedded applications requiring integrated analog peripherals, robust I/O, and field-programmable Flash - targeting industrial controls, consumer appliances, and sensor interfaces.

FAQ

What is the maximum operating frequency of the ST7FLI15BF1U6?

The ST7FLI15BF1U6 achieves up to 8 MHz CPU frequency using its internal PLL (x4 or x8 multiplier) with a 1 MHz RC oscillator or external 16 MHz clock source. At 5 V, it sustains this speed across the full −40°C to +85°C temperature range, with timing validated per Section 13.5 of the datasheet.

Does the ST7FLI15BF1U6 support in-application programming (IAP)?

Yes - the ST7FLI15BF1U6 supports full In-Application Programming of its 4 KB XFlash memory. Firmware can reprogram designated Flash sectors while executing from other regions, enabling dynamic parameter storage, bootloader updates, and field firmware upgrades without halting system operation.

How many ADC input channels does the ST7FLI15BF1U6 have, and what are their voltage ranges?

The ST7FLI15BF1U6 provides 7 ADC input channels (AIN0–AIN6). It delivers 13-bit effective resolution for inputs from 0 to 430 mV and 10-bit resolution for 430 mV to 5 V, both referenced to V_DD at 5 V. This dual-range architecture eliminates external amplifiers for low-level sensor signals like thermocouples or bridge sensors.

Can the ST7FLI15BF1U6 operate from a single 3.3 V supply?

Yes - the ST7FLI15BF1U6 operates across 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. Its internal LVD monitors V_DD down to 2.5 V (typical), and all I/Os are 5 V-tolerant when configured as inputs, enabling seamless interfacing with mixed-voltage peripherals without level shifters.

ST7FLI15BF1U6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 20-VQFN Exposed Pad

Series:: ST7

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Core Processor:: ST7

Core Size:: 8-Bit

Speed:: 8MHz

Connectivity:: SPI

Peripherals:: LVD, POR, PWM, WDT

Number of I/O:: 17

Program Memory Size:: 4KB (4K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 256 x 8

Voltage - Supply (Vcc/Vdd):: 2.7V ~ 5.5V

Data Converters:: A/D 7x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

ST7FLI15BF1U6 FAQ

1.How can I place an order for ST7FLI15BF1U6 through Aetrix?

Please submit a Request for Quotation (RFQ) for ST7FLI15BF1U6 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 ST7FLI15BF1U6 reliable?

The price and inventory of ST7FLI15BF1U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FLI15BF1U6 is usually 5 days.

3.What payment methods are accepted for ST7FLI15BF1U6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FLI15BF1U6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST7FLI15BF1U6?

ST7FLI15BF1U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST7FLI15BF1U6 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 ST7FLI15BF1U6?

For technical support, including ST7FLI15BF1U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FLI15BF1U6 requirements.

6.How does Aetrix verify that ST7FLI15BF1U6 is sourced from the original manufacturer or authorized distributors?

All ST7FLI15BF1U6 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 ST7FLI15BF1U6 meets industry standards.

7.What is the process for return or replacement of ST7FLI15BF1U6?

All ST7FLI15BF1U6 units undergo pre-shipment inspection (PSI). If there is an issue with ST7FLI15BF1U6, 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 ST7FLI15BF1U6 part is unused and in its original packaging.

Return procedure for ST7FLI15BF1U6:

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…