STMicroelectronics ST7FLIT15BF0M3

Overview

ST7FLIT15BF0M3 from STMicroelectronics is an 8-bit Flash microcontroller with 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 battery-powered sensor nodes requiring low-power operation and mixed-signal control.

For engineers reviewing the ST7FLIT15BF0M3 datasheet, ST7FLIT15BF0M3 pinout, ST7FLIT15BF0M3 application, or ST7FLIT15BF0M3 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, five power-saving modes (Halt, Wait, Slow), and high-sink (20 mA) I/O for direct LED/relay drive without external buffers.

Technical Context

This MCU implements an enhanced ST7 8-bit core with true bit manipulation, 8×8 unsigned multiply, and 17 addressing modes. Its clock system integrates a factory-trimmed 1% internal RC oscillator, optional x4/x8 PLL for 4/8 MHz internal clocks, and dual clock sources (crystal/resonator or external clock) with auxiliary voltage detector (AVD) and enhanced low-voltage supervisor (LVD) for safe power-down.

The peripheral set includes two independent 12-bit auto-reload timers supporting input capture, output compare, PWM generation, and pulse functions - plus a dedicated Lite Timer with watchdog - all accessible via configurable interrupt vectors (12 vectors + TRAP/RESET) and 15 external interrupt lines mapped across four vectors.

Key Specifications

Pinout & Package

ST7FLIT15BF0M3 is packaged in a 20-pin SOIC (SO20 300 mil) with 0.6 mm pitch and standard JEDEC MS-013AC footprint. Pin functions are validated per ST's official pinout diagrams for SO20/DIP20 packages (Figures 2 & 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S003F3P6 and PIC16F1503-I/P, ST7FLIT15BF0M3 uniquely combines on-chip data EEPROM, analog comparator, AVD, and high-sink I/O in a single 20-pin SOIC package - making it optimal for self-contained, low-power supervisory and sensor fusion applications without external support components.

Availability

ST7FLIT15BF0M3 is available at Aetrix Electronics and suitable for industrial motor control modules, portable medical devices, smart thermostat sensor nodes, and home appliance power monitors requiring stable component supply and long-term lifecycle support.

Supply support for ST7FLIT15BF0M3 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 products for industrial, automotive, and consumer markets.

The ST7LITE1xB family targets cost-optimized, low-power embedded control applications - emphasizing integrated analog peripherals, robust Flash reliability, and minimal external component count for rapid time-to-market in resource-constrained designs.

FAQ

What is the maximum operating frequency of ST7FLIT15BF0M3?

The ST7FLIT15BF0M3 operates up to 8 MHz using an external 16 MHz crystal with internal x2 divider, or up to 8 MHz via internal 1 MHz RC oscillator with x8 PLL. The internal RC oscillator is factory-trimmed to ±1% accuracy at 25°C and supports immediate startup without crystal stabilization delay.

Does ST7FLIT15BF0M3 support in-application programming (IAP)?

Yes - ST7FLIT15BF0M3 supports full IAP via its XFlash memory architecture. Firmware can reprogram designated Flash sectors during runtime using the ICC interface, enabling secure OTA updates and dynamic parameter storage without halting application execution.

How many ADC channels does ST7FLIT15BF0M3 have, and what is their resolution?

It has 7 ADC input channels with selectable dual-range precision: 13-bit effective resolution for signals up to 430 mV and 10-bit resolution for 430 mV to 5 V, both referenced to VDD. This is achieved using an integrated fixed-gain op-amp and programmable input scaling - no external amplification required for low-level sensor signals.

Can ST7FLIT15BF0M3 generate multiple synchronized PWM signals?

Yes - its dual 12-bit auto-reload timers provide four independent PWM outputs (ATPWM0–3) with configurable phase alignment and dead-time insertion. All four channels share the same base clock and reload register, ensuring precise synchronization for motor control or lighting applications.