STMicroelectronics ST7FLIT15BY1M6

Overview

ST7FLIT15BY1M6 from STMicroelectronics is an 8-bit Flash microcontroller featuring 4 KB XFlash program memory, 256 bytes RAM, 128 bytes data EEPROM, 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 operation and mixed-signal control.

For engineers reviewing the ST7FLIT15BY1M6 datasheet, ST7FLIT15BY1M6 pinout, ST7FLIT15BY1M6 application, or ST7FLIT15BY1M6 equivalent, key selection criteria include single-voltage Flash IAP/ICP capability, 20-year data retention at 55°C, 2.7–5.5 V operating range, 8 MHz max CPU frequency (with PLL x4/x8), and 17 I/O lines with 7 high-sink (20 mA) outputs.

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, auxiliary voltage detector (AVD) with interrupt, and dual clock domains: a 1% RC oscillator (1 MHz) plus external crystal/ceramic or clock input up to 16 MHz.

The peripheral set includes two independent 12-bit auto-reload timers supporting PWM generation, input capture, and pulse output; one Lite Timer with watchdog; SPI master/slave; and a 10-bit ADC with fixed-gain op-amp enabling precise low-voltage measurement (13-bit precision for 0–430 mV @ 5 V).

Key Specifications

Pinout & Package

ST7FLIT15BY1M6 is available in SO20 (300 mil), DIP20, SO16 (300 mil), DIP16, and QFN20 packages. The SO20 and DIP20 variants use identical 20-pin mapping per Figure 2 of the datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST7FLIT15BY1M6, ST7FLITE09Y1M6 reduces Flash and removes analog supervision features, while STM8S003F3P6 offers higher speed and memory but requires external op-amp circuitry for sub-430 mV signal measurement.

Availability

ST7FLIT15BY1M6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering interfaces, motor control subsystems, and embedded power sequencers requiring stable component supply across extended product lifecycles.

Supply support for ST7FLIT15BY1M6 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The ST7LITE1xB family delivers cost-optimized 8-bit MCUs targeting resource-constrained embedded systems requiring Flash flexibility, analog integration, and ultra-low-power operation in harsh environments.

FAQ

What is the maximum operating frequency of the ST7FLIT15BY1M6?

The ST7FLIT15BY1M6 achieves up to 8 MHz CPU frequency using its internal 1 MHz RC oscillator with PLL ×8, or by applying an external 16 MHz clock source directly to OSC1. The PLL is optional and configurable via option bytes; no external components are needed for basic operation.

Does the ST7FLIT15BY1M6 support in-system programming without a debug probe?

Yes - the ST7FLIT15BY1M6 supports In-Circuit Programming (ICP) via its built-in ICC interface using only three pins (ICCCLK, ICCDATA, RESET). No external debugger is required; firmware updates can be performed through a simple UART-to-ICC bridge or custom bootloader implementing the ST7 ICC protocol.

How does the ADC achieve 13-bit precision for low-voltage signals?

The ADC uses an integrated fixed-gain op-amp to amplify signals in the 0–430 mV range before digitization, effectively extending resolution to 13 bits within that subrange. At 5 V VDD, this corresponds to ~105 µV LSB, enabling precise thermocouple or strain gauge measurements without external amplification.

Can the high-sink I/O pins drive standard LEDs directly?

Yes - seven I/O pins (PA0–PA5, PA7) support 20 mA sink current at VDD = 5 V, sufficient to drive common 20 mA LEDs without external transistors. Each pin includes configurable pull-up, interrupt, and analog input capability, allowing shared use for status indication and sensing functions.