Infineon Technologies XC8866FFI5VACFXUMA1

Overview

XC8866FFI5VACFXUMA1 from Infineon Technologies is an 8-bit single-chip microcontroller based on the XC800 core, compatible with the standard 8051 instruction set and executing instructions at two clocks per machine cycle. It integrates 24 KB Flash memory, 12 KB Boot ROM, 256 B RAM, and 1.5 KB XRAM, with dual-voltage I/O (3.3 V or 5.0 V) and 2.5 V core supply regulated on-chip. It supports CAN 2.0B via MultiCAN, 10-bit 8-channel ADC, and CCU6 for motor control - deployed in automotive body electronics and industrial motor drives.

For engineers reviewing the XC8866FFI5VACFXUMA1 datasheet, XC8866FFI5VACFXUMA1 pinout, XC8866FFI5VACFXUMA1 application, or XC8866FFI5VACFXUMA1 equivalent, key selection considerations include its integrated MultiCAN interface, on-chip voltage regulator enabling mixed-voltage operation, flash-based field programmability, and CCU6 timer unit optimized for three-phase motor commutation timing.

Technical Context

The XC8866FFI5VACFXUMA1 implements a two-clock-per-machine-cycle 8051-compatible CPU core with dual data pointers and hardware multiplication/division (MDU) plus CORDIC coprocessor for real-time trigonometric computation. Its memory architecture separates code (Flash/ROM), data (RAM/XRAM), and boot firmware (12 KB protected Boot ROM), with configurable memory protection via password-protected registers.

It features a fully integrated clock system with internal RC oscillator, external crystal support (XTAL1/XTAL2), PLL for frequency multiplication, and multiple power-saving modes including idle and power-down. The MultiCAN module supports up to 64 message objects with hardware acceptance filtering and time-triggered communication capability.

Key Specifications

Pinout & Package

XC8866FFI5VACFXUMA1 is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad, rated for industrial temperature range (–40 °C to +125 °C) and qualified per AEC-Q100 Grade 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC8866FFI5VACFXUMA1, XC878CM-16FFI trades CAN scalability and motor control capability for lower cost, while S9KEAZ128AMLH offers greater processing headroom at the expense of integrated analog/motor peripherals and power integration - making XC8866FFI5VACFXUMA1 optimal for compact, self-contained automotive and industrial motion control nodes.

Availability

XC8866FFI5VACFXUMA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, smart power outlets, and PLC I/O expansion nodes requiring stable component supply across extended product lifecycles.

Supply support for XC8866FFI5VACFXUMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power semiconductors, automotive MCUs, and security controllers, with global R&D and manufacturing infrastructure.

The XC800 family was designed specifically for cost-sensitive, high-reliability automotive and industrial embedded applications demanding integrated CAN, motor control peripherals, and robust flash-based firmware execution - targeting body electronics, lighting, and small-power motor drives.

FAQ

Does XC8866FFI5VACFXUMA1 support CAN FD?

No. XC8866FFI5VACFXUMA1 implements Classical CAN (CAN 2.0B) only, with bit rates up to 1 Mbps and 11-bit standard identifiers. It lacks the arbitration phase extension, flexible data-rate switching, and payload length increase required for CAN FD. For CAN FD applications, consider Infineon's newer AURIX™ TC2xx or XMC4000 families.

What is the maximum operating frequency of the XC800 core in this device?

The XC800 core in XC8866FFI5VACFXUMA1 operates at up to 26.7 MHz system clock frequency, achieved using the on-chip PLL with external crystal input (e.g., 10 MHz crystal × 2.67 PLL multiplier). At this frequency, instruction throughput reaches 13.35 MIPS due to the two-clock-per-cycle architecture.

Is the 12 KB Boot ROM field-programmable or read-only?

The 12 KB Boot ROM is factory-programmed and read-only. It contains a bootloader supporting UART-based firmware updates and cannot be modified in the field. This ensures boot integrity and prevents corruption during Flash reprogramming - a requirement for automotive ASIL-B compliant designs.

Can Port 0 pins be used simultaneously for LIN and UART1 functions?

Yes. P0.0 serves as LIN transceiver TX/RX (with internal LIN physical layer driver), while P0.1 serves as UART1 RX - both are active concurrently. However, P0.0 cannot function as general-purpose I/O when LIN mode is enabled, and UART1 TX must be assigned to another pin (e.g., P0.2) if LIN is active on P0.0.