STMicroelectronics ST7FLIT19BF1M6

Overview

ST7FLIT19BF1M6 from STMicroelectronics is an 8-bit Flash microcontroller featuring 4 KB XFlash program memory, 256 bytes RAM, 128 bytes data EEPROM, 7-channel 10-bit ADC with integrated op-amp, dual 12-bit auto-reload timers (4 PWM outputs), SPI interface, analog comparator, and enhanced reset/LVD/AVD supervision. It operates from 2.7–5.5 V at up to 8 MHz and targets low-power industrial sensor nodes and motor control subsystems.

For engineers reviewing the ST7FLIT19BF1M6 datasheet, ST7FLIT19BF1M6 pinout, ST7FLIT19BF1M6 application, or ST7FLIT19BF1M6 equivalent, key selection criteria include its 20 mA high-sink I/O capability, in-application programming (IAP) support, 300K EEPROM write/erase cycles, 20-year data retention at 55°C, and dual auto-reload timer architecture with input capture and pulse generation.

Technical Context

This MCU implements an industry-standard 8-bit ST7 core with 63 instructions, 17 addressing modes, and true bit manipulation. Its clock system integrates a factory-trimmed 1% internal RC oscillator, optional x4/x8 PLL for 4/8 MHz operation, and external crystal/ceramic or clock input support - enabling precise timing without external components in cost-sensitive designs.

The peripheral set centers on deterministic real-time control: two 12-bit auto-reload timers deliver four independent PWM outputs plus input capture and pulse functions, while the 7-channel ADC supports programmable gain op-amp front-end for sub-430 mV signals at 13-bit precision - critical for current sensing and battery monitoring applications.

Key Specifications

Pinout & Package

ST7FLIT19BF1M6 is housed in a 20-pin SOIC (SO20 300") package with 0.600" body width and standard 1.27 mm pitch. Pin assignments are validated per ST's official datasheet Rev 6 (June 2008), Figure 2 and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST7FLIT19BF1M6, the ST7FLITE15BF1M6 reduces memory and analog features for lower BOM cost, while the STM8S003F3P6 offers greater processing headroom at the expense of added external components for precision low-voltage sensing and drive capability.

Availability

ST7FLIT19BF1M6 is available at Aetrix Electronics and suitable for industrial sensor nodes, brushless DC motor control subsystems, smart power outlets, and portable medical monitors requiring stable component supply and long-term manufacturability.

Supply support for ST7FLIT19BF1M6 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-grade components since 1987.

The ST7LITE1xB family delivers cost-optimized 8-bit MCUs for resource-constrained industrial and consumer applications requiring robust analog integration, ultra-low-power operation, and field-programmable Flash memory.

FAQ

What is the maximum operating frequency of the ST7FLIT19BF1M6?

The ST7FLIT19BF1M6 achieves up to 8 MHz CPU frequency using its internal PLL (x4 or x8) driven by the 1 MHz internal RC oscillator or an external 16 MHz crystal. External clock input up to 16 MHz is supported, and the internal 32 MHz input clock feeds the auto-reload timer independently of CPU speed.

Does the ST7FLIT19BF1M6 support in-system programming without removing it from the PCB?

Yes - it supports In-Circuit Programming (ICP) via the ICC interface using dedicated pins (PA6/ICCCLK and PA7/ICCDATA). This allows full Flash and EEPROM programming, verification, and option byte configuration while soldered on the target board, using standard ST tools like STVP or third-party programmers.

How many ADC channels can be used simultaneously, and what is their effective resolution?

All seven ADC input channels (PB0–PB6) are multiplexed onto a single SAR converter and cannot sample simultaneously. At 5 V VDD, it delivers 13-bit effective resolution for input ranges up to 430 mV (using internal op-amp gain) and 10-bit resolution for 430 mV to 5 V - verified per Section 13.11 of the datasheet.

Is the 20 mA high-sink capability available on all I/O pins?

No - only seven specific pins (PA0–PA5 and PA7) are designated with HS (high sink) capability and rated for 20 mA continuous sink current. Other I/O pins default to standard CMOS drive strength (~10 mA sink/source); this distinction is defined in Table 1 (Pin Description) and must be observed in layout and schematic design.