STMicroelectronics ST7FLIT15BF0M6TR

Overview

ST7FLIT15BF0M6TR from STMicroelectronics is an 8-bit Flash microcontroller featuring 4 KB XFlash program memory, 256 bytes RAM, 128 bytes data EEPROM with 300K write/erase cycles, 10-bit ADC with integrated op-amp, dual 12-bit auto-reload timers (4 PWM outputs), SPI interface, and analog comparator - deployed in industrial sensor nodes requiring low-power, mixed-signal control with on-chip signal conditioning.

For engineers reviewing the ST7FLIT15BF0M6TR datasheet, ST7FLIT15BF0M6TR pinout, ST7FLIT15BF0M6TR application, or ST7FLIT15BF0M6TR equivalent, key selection criteria include single-voltage Flash IAP/ICP capability, 20 mA high-sink I/Os for direct LED/relay drive, 1% internal RC oscillator accuracy, AVD/LVD interrupt-enabled power management, and 20-pin SO package compatibility with legacy ST7LITE1xB designs.

Technical Context

This MCU implements an enhanced ST7 8-bit core with true bit manipulation, 8×8 unsigned multiply, and 17 addressing modes. It integrates a programmable internal voltage reference, analog comparator with external reference input (COMPIN−/CLKIN), and dual auto-reload timers supporting input capture, output compare, and pulse generation at up to 32 MHz clock input.

The peripheral set includes SPI with master/slave mode, watchdog timer, five power-saving modes (Halt, Active-Halt, Auto Wake-up, Wait, Slow), and ADC with fixed-gain op-amp enabling 13-bit precision for low-voltage signals (0–430 mV) and 10-bit precision across full 5 V range - all operating from 2.7–5.5 V supply.

Key Specifications

Pinout & Package

ST7FLIT15BF0M6TR is housed in a 20-pin Small Outline (SO20) package with 300 mil body width, RoHS-compliant lead finish, and standard JEDEC MS-013AC footprint - compatible with automated SMT assembly and legacy ST7LITE1xB PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST7FLIT15BF0M6TR, ST7FLITE19BF0M6TR extends thermal range and package options without changing peripheral functionality, while STM8S003F3P6 trades analog integration for higher performance and memory - making the ST7FLIT15BF0M6TR optimal for analog-intensive, thermally moderate embedded control.

Availability

ST7FLIT15BF0M6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart power outlets, low-cost motor controllers, and embedded HVAC interfaces requiring stable component supply and long-term obsolescence management.

Supply support for ST7FLIT15BF0M6TR 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 analog devices for industrial, automotive, and consumer markets.

The ST7LITE1xB product line delivers cost-optimized 8-bit Flash MCUs targeting resource-constrained embedded systems requiring mixed-signal integration, ultra-low-power operation, and field-upgradable firmware - with emphasis on industrial automation and appliance control.

FAQ

What is the maximum ADC input voltage range and resolution configuration?

The ADC supports two precision modes: 13-bit effective resolution for 0–430 mV inputs (using internal op-amp gain) and 10-bit resolution for 430 mV–5 V inputs, both referenced to VDD. Full-scale range is fixed at VDD; no external reference input is supported. Conversion time is 13 µs per sample at 1 MHz CPU clock.

Does ST7FLIT15BF0M6TR support in-circuit debugging, and what interface is used?

Yes, it includes an on-chip Debug Module (DM) supporting In-Circuit Debugging (ICD) via the ICC (In-Circuit Communication) interface using PA6 (ICCCLK) and PA5 (ICCDATA) pins. No JTAG port is present; debugging requires ST's STVP or ST-LINK-compatible ICC programmers with appropriate adapter cables.

Can the internal 1% RC oscillator be used as the sole clock source for reliable timing-critical applications?

Yes - the internal RC oscillator is factory-trimmed to ±1% accuracy at 25°C and maintains ±2% over -40°C to +85°C. It supports all power-saving modes and is sufficient for UART communication (up to 9600 baud), PWM generation, and real-time clock functions where ±2% timing tolerance is acceptable.

How is Flash memory protected against unauthorized read-out or accidental overwrite?

Read-out protection is enabled via Option Bytes that lock Flash access; once set, no external tool can read program memory contents. Write protection is enforced by hardware - Flash writes require specific unlock sequences and occur only in ICP/IAP mode after verifying sector addresses and erase-before-write conditions per ST's Flash programming protocol.