STMicroelectronics ST7FLIT15BF1M6

Overview

ST7FLIT15BF1M6 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, analog comparator, SPI interface, and five timers-including two 12-bit auto-reload timers with four PWM outputs. It operates from 2.7 V to 5.5 V and supports up to 8 MHz CPU frequency using internal RC oscillator (1% accuracy), external crystal, or PLL multiplication, targeting low-power embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the ST7FLIT15BF1M6 datasheet, ST7FLIT15BF1M6 pinout, ST7FLIT15BF1M6 application, or ST7FLIT15BF1M6 equivalent, key selection criteria include its 20-pin SO package, 7 high-sink I/O lines (20 mA), dual auto-reload timer PWM capability, on-chip debug module (DM) for in-circuit debugging, and guaranteed 300K EEPROM write/erase cycles with 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, optional x4/x8 PLL for 4/8 MHz internal clocks, and auxiliary voltage detector (AVD) with interrupt for safe power-down sequencing.

The peripheral set includes a configurable watchdog timer, two 8-bit Lite Timers (one with WDG), two 12-bit Auto-reload Timers supporting input capture, output compare, pulse generation, and four independent PWM channels, plus SPI synchronous serial interface and interrupt management with 12 vectors and 15 external interrupt lines mapped across four vectors.

Key Specifications

Pinout & Package

ST7FLIT15BF1M6 is housed in a 20-pin Small Outline (SO20 300") package with 0.65 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 ST7FLIT15BF1M6, ST7FLITE19BF1M6 offers extended thermal robustness and I/O count without changing PCB layout, while STM8S003F3P6 delivers greater processing headroom and modern toolchain support but sacrifices integrated analog functionality essential for cost-sensitive sensor nodes.

Availability

ST7FLIT15BF1M6 is available at Aetrix Electronics and suitable for industrial sensor nodes, small motor controllers, smart meter interfaces, and home appliance control panels requiring stable component supply and long-term obsolescence management.

Supply support for ST7FLIT15BF1M6 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 was engineered for cost-sensitive, ultra-low-power embedded control applications where integrated analog peripherals, Flash flexibility, and debug capability are essential-targeting appliances, building automation, and portable instrumentation.

FAQ

What is the maximum operating frequency of the ST7FLIT15BF1M6?

The ST7FLIT15BF1M6 achieves up to 8 MHz CPU frequency: using an external 16 MHz crystal with internal divide-by-2, or via internal 1 MHz RC oscillator multiplied by PLL (x4 or x8). The 32 MHz internal clock input is dedicated to the auto-reload timer's prescaler-not the CPU clock domain.

Does the ST7FLIT15BF1M6 support in-application programming (IAP)?

Yes. The device supports byte-by-byte In-Application Programming of its 4 KB XFlash memory under software control, enabling firmware updates without external programmers. IAP requires proper sector locking/unlocking via option bytes and adheres to strict timing constraints documented in Section 4.3 of the datasheet.

How many ADC input channels does the ST7FLIT15BF1M6 have, and what is their resolution?

The ST7FLIT15BF1M6 features seven ADC input channels (AIN0–AIN6) with 10-bit nominal resolution. At 5 V VDD, it delivers 13-bit effective precision for input ranges up to 430 mV and 10-bit precision for 430 mV to 5 V-leveraging an integrated fixed-gain op-amp for low-amplitude signal conditioning.

Is the ST7FLIT15BF1M6 pin-compatible with other ST7LITE1xB variants?

Yes-ST7FLIT15BF1M6 shares identical 20-pin SO20 (300") pinout and electrical characteristics with ST7FLITE10BF1M6 and ST7FLITE19BF1M6. Differences lie in Flash size (2 KB/4 KB), RAM allocation, and temperature grade; all share the same peripheral register map and instruction set for seamless firmware portability.