Infineon Technologies SAF-XC866-4FRI BC

Overview

SAF-XC866-4FRI BC 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 12 KB of program Flash, 4 KB of data Flash, 8 KB Boot ROM, 256 bytes RAM, and 512 bytes XRAM, operating at 5.0 V supply across –40 °C to +85 °C industrial temperature range for motor control and power conversion applications.

For engineers reviewing the SAF-XC866-4FRI BC datasheet, SAF-XC866-4FRI BC pinout, SAF-XC866-4FRI BC application, or SAF-XC866-4FRI BC equivalent, key selection factors include its 10-bit 8-channel ADC resolution, CCU6-based PWM generation capability, on-chip debug support via 1 KB monitor ROM, and PG-TSSOP-38 package compatibility with industrial-grade thermal reliability.

Technical Context

The XC866 implements a two-clock-per-cycle 8051-compatible core with dual data pointers and embedded 2.5 V core regulator, enabling zero-wait-state memory access. Its peripheral set includes three 16-bit timers (T0/T1/T2), a watchdog timer, UART, synchronous serial channel (SSC), and a dedicated Capture/Compare Unit (CCU6) for high-resolution PWM timing in motor drive stages.

Reset architecture supports power-on, hardware, brownout (for 2.5 V core supply), watchdog, and wake-up from power-down mode via RXD or EXINT0. Clock generation combines on-chip oscillator and PLL with loss-of-lock detection, supporting both 5.0 V and 3.3 V I/O supply variants while maintaining core logic at regulated 2.5 V.

Key Specifications

Pinout & Package

SAF-XC866-4FRI BC is housed in a PG-TSSOP-38 (plastic thin shrink small outline package) with 38 leads, 0.65 mm pitch, and exposed thermal pad for enhanced heat dissipation in motor driver PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SAF-XC866-2FRI BC, the -4FRI offers 8 KB more Flash for complex control algorithms and diagnostics; versus SAF-XC886-4FRI BC, it lacks CAN but reduces BOM cost and simplifies layout in standalone motor modules.

Availability

SAF-XC866-4FRI BC is available at Aetrix Electronics and suitable for brushless DC motor control, industrial power supply monitoring, smart lighting ballast control, and PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SAF-XC866-4FRI BC 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 management, automotive ICs, and microcontrollers, with headquarters in Munich and global manufacturing and R&D facilities.

The XC866 belongs to the XC800 family, designed specifically for cost-sensitive industrial motor control and power conversion applications where 8-bit performance, integrated analog peripherals, and robust industrial qualification are essential.

FAQ

What is the maximum operating frequency of the SAF-XC866-4FRI BC?

The SAF-XC866-4FRI BC supports up to 20 MHz crystal input, yielding a maximum core clock of 20 MHz (with 2 clocks per machine cycle). The internal PLL can multiply this frequency, but the datasheet specifies 20 MHz as the maximum rated crystal frequency for stable operation across the full temperature range.

Does SAF-XC866-4FRI BC support LIN communication out of the box?

No. According to Table 1 in the datasheet, only XC866L variants include LIN Bootloader (LIN BSL) support. The SAF-XC866-4FRI BC does not have factory-programmed LIN firmware, though UART-based custom LIN protocol implementation is possible using the integrated UART peripheral.

Can the 4 KB D-Flash be used for EEPROM emulation?

Yes. The 4 KB D-Flash is separately erasable and writable under firmware control, and Infineon's application notes (e.g., AP32165) describe wear-leveling and page-management techniques to emulate EEPROM functionality for parameter storage with >100,000 write cycles.

Is the PG-TSSOP-38 package RoHS-compliant?

Yes. Infineon confirms RoHS compliance for all XC866 variants in PG-TSSOP-38 packaging per their 2007 product change notification (PCN 2007-08-15), with lead-free terminations and halogen-free molding compound meeting EU Directive 2011/65/EU requirements.