STMicroelectronics ST7FLIT19BF1B6

Overview

ST7FLIT19BF1B6 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 industrial sensor nodes requiring low-power operation and mixed-signal control.

For engineers reviewing the ST7FLIT19BF1B6 datasheet, ST7FLIT19BF1B6 pinout, ST7FLIT19BF1B6 application, or ST7FLIT19BF1B6 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, 1% internal RC oscillator, 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. It integrates a programmable internal voltage reference, analog comparator with interrupt capability, and dual auto-reload timers supporting input capture, output compare, and pulse generation - enabling precise timing-critical control loops.

The clock system combines an internal 1% RC oscillator (1 MHz), optional PLL (×4/×8), external crystal/ceramic resonator, or external clock input, feeding five power-saving modes: Halt, Active-Halt, Auto Wake-up from Halt, Wait, and Slow - all managed via dedicated register-controlled state transitions.

Key Specifications

Pinout & Package

ST7FLIT19BF1B6 is housed in a 20-pin SOIC (SO20 300 mil) package with 0.6 mm lead pitch and standard JEDEC MS-013AC footprint. 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 Flash microcontroller applications.

Compared with ST7FLIT19BF1B6, ST7FLITE29F2B6 extends memory and adds UART for protocol stacks, while STM8S003F3P6 trades analog comparator capability for higher speed and modern toolchain compatibility - making ST7FLIT19BF1B6 optimal for legacy-compatible, analog-rich, low-power sensor edge nodes.

Availability

ST7FLIT19BF1B6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart actuator controllers, energy meter interfaces, and programmable power supply monitors requiring stable component supply across extended product lifecycles.

Supply support for ST7FLIT19BF1B6 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 components for industrial, automotive, and consumer markets.

ST7LITE1xB series targets cost-sensitive, low-power embedded control applications - emphasizing Flash flexibility, analog integration, and robust operation in harsh environments without external support components.

FAQ

What is the maximum operating frequency of ST7FLIT19BF1B6?

The ST7FLIT19BF1B6 supports up to 8 MHz CPU frequency: achieved either with an external 16 MHz crystal (divided by 2) or via internal 1 MHz RC oscillator multiplied by PLL (×4 or ×8). Electrical characteristics in Section 13.5 confirm timing compliance up to 8 MHz across the full 2.7–5.5 V and –40°C to +85°C range.

Does ST7FLIT19BF1B6 support in-system programming without high voltage?

Yes - it features single-voltage In-Circuit Programming (ICP) and In-Application Programming (IAP) using only the standard VDD supply (2.7–5.5 V). No external 12 V or special programming voltage is required, and the Debug Module (DM) enables full read/write/erase access via ICC interface using two dedicated pins (PA6/ICCCLK and PA7/ICCDATA).

How many analog input channels does the ADC support, and what is its effective resolution?

The integrated 10-bit ADC supports 7 analog input channels (AIN0–AIN6). Its effective precision is dual-range: 13-bit resolution for signals between 0–430 mV and 10-bit resolution for 430 mV–5 V (at 5 V VDD), enabled by an internal fixed-gain op-amp - allowing high-resolution measurement of low-level sensor outputs without external amplification.

Can ST7FLIT19BF1B6 wake from Halt mode using external interrupts?

Yes - it supports Auto Wake-up from Halt mode triggered by any of 15 external interrupt lines mapped across four vectors (ei0–ei3). The enhanced interrupt controller allows selective enable/disable per line, and wake-up latency is guaranteed ≤4 µs from interrupt assertion to first instruction fetch, as specified in Section 8.2 of the datasheet.