STMicroelectronics ST7FLI19BY1M3TR

Overview

ST7FLI19BY1M3TR 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), SPI interface, and analog comparator - deployed in industrial sensor nodes requiring low-power, mixed-signal control and on-the-fly firmware updates.

For engineers reviewing the ST7FLI19BY1M3TR datasheet, ST7FLI19BY1M3TR pinout, ST7FLI19BY1M3TR application, or ST7FLI19BY1M3TR equivalent, key selection criteria include single-voltage IAP capability, 20 mA high-sink I/O lines, internal 1% RC oscillator with optional PLL, five power-saving modes (Halt, Wait, Slow), and guaranteed 20-year data retention at 55°C.

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, external crystal/ceramic resonator support, and a configurable x4/x8 PLL for stable 4 MHz or 8 MHz internal clocks - enabling precise timing without external crystals in cost-sensitive designs.

The peripheral set centers on deterministic real-time control: two 12-bit auto-reload timers deliver four independent PWM outputs with input capture and output compare, while the 10-bit ADC supports seven analog inputs with programmable gain op-amp and dual-range precision (13-bit for 0–430 mV, 10-bit for 430 mV–5 V at 5 V_DD).

Key Specifications

Pinout & Package

ST7FLI19BY1M3TR is housed in a 20-pin SOIC (SO20 300 mil) package with 0.6 mm pitch, compliant with JEDEC MS-013AC. Pin assignments are validated per ST's official datasheet Rev 6 (June 2008), Figure 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST7FLI19BY1M3TR, ST7FLITE19Y1M3TR offers identical functionality with packaging variance only, while STM8S003F3P6 provides greater processing headroom and memory but removes integrated analog front-end features critical for low-voltage sensor signal conditioning.

Availability

ST7FLI19BY1M3TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, programmable power supply monitors, and legacy equipment interface adapters requiring stable component supply and long-term obsolescence management.

Supply support for ST7FLI19BY1M3TR 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 ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The ST7LITE1xB series was engineered for cost-sensitive, low-power embedded control applications demanding integrated analog peripherals, field-programmable Flash, and robust operation across –40°C to +125°C ambient conditions.

FAQ

What is the maximum operating frequency of the ST7FLI19BY1M3TR?

The ST7FLI19BY1M3TR achieves up to 8 MHz CPU frequency using its internal PLL (x4 or x8) with the 1% RC oscillator, or up to 16 MHz with an external crystal or clock source. Electrical characteristics in Section 13.5 of the datasheet confirm stable operation at 8 MHz across the full –40°C to +125°C temperature range with 2.7–5.5 V supply.

Does the ST7FLI19BY1M3TR support in-system programming without external hardware?

Yes - it supports In-Circuit Programming (ICP) and In-Application Programming (IAP) via its built-in ICC interface using only two pins (ICCCLK and ICCDATA). No external programmer is needed; firmware updates can be performed through UART or SPI using ST's standard ICC protocol and bootloader routines.

How many analog input channels does the integrated ADC support?

The integrated 10-bit ADC supports seven analog input channels (AIN0 through AIN6), accessible via PB0–PB6 pins. Each channel can be selected under software control, and the ADC operates with programmable gain op-amp for enhanced sensitivity on low-amplitude signals (0–430 mV range).

Is the ST7FLI19BY1M3TR RoHS-compliant and lead-free?

Yes - ST7FLI19BY1M3TR is manufactured in accordance with RoHS Directive 2011/65/EU and is lead-free. The "Y" in the part number denotes RoHS-compliant packaging, and the device meets JEDEC J-STD-020 moisture sensitivity level MSL3 for standard reflow processes.