Infineon Technologies SAF-XC866L-4FRA BE

Overview

SAF-XC866L-4FRA BE from Infineon Technologies is an 8-bit single-chip microcontroller based on the XC800 core (8051-compatible), featuring 12 KB of program Flash, 4 KB of data Flash, and operation across –40 °C to +85 °C. It integrates a 10-bit 8-channel ADC, three 16-bit timers, CCU6 capture/compare unit for PWM, UART, SSC, and on-chip debug support - deployed in automotive body control modules requiring LIN communication.

For engineers reviewing the SAF-XC866L-4FRA BE datasheet, SAF-XC866L-4FRA BE pinout, SAF-XC866L-4FRA BE application, or SAF-XC866L-4FRA BE equivalent, key selection factors include LIN Bootloader (LIN BSL) support, 5 V supply compatibility, Flash memory protection scheme, and PG-TSSOP-38 package constraints for space-constrained automotive PCB layouts.

Technical Context

The SAF-XC866L-4FRA BE implements a two-clock-per-machine-cycle XC800 core with dual data pointers and embedded 2.5 V core regulator supplied from 5 V VDD. Its clock system combines on-chip oscillator and PLL with loss-of-lock detection, enabling stable timing for LIN protocol compliance at 19.2–20 kHz baud rates.

Memory architecture includes 8 KB Boot ROM (with 1 KB monitor ROM), 256 B RAM, 512 B XRAM, and segmented Flash with configurable write protection. Peripheral control uses rwh-access registers (e.g., Px_DIR, PAGE bits), and reset sources include power-on, brownout, watchdog, and wake-up via RXD/EXINT0.

Key Specifications

Pinout & Package

SAF-XC866L-4FRA BE is housed in a PG-TSSOP-38 (plastic thin shrink small outline package) with 38 leads, 0.5 mm pitch, and exposed thermal pad. Package dimensions: 12.5 mm × 6.1 mm × 1.2 mm (max height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SAF-XC866L-4FRA BE, SAF-XC886L-4FRA offers higher PWM precision and memory headroom for complex control algorithms, while TLF8051ED-4FRA reduces system-level complexity by integrating the LIN transceiver but mandates layout changes and qualification of new silicon.

Availability

SAF-XC866L-4FRA BE is available at Aetrix Electronics and suitable for automotive body electronics, LIN-based sensor nodes, and industrial control panels requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SAF-XC866L-4FRA BE 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 MCUs, and security solutions, with global R&D and manufacturing infrastructure.

The XC866 belongs to Infineon's XC800 family - designed specifically for cost-optimized, LIN-centric automotive body electronics where robustness, Flash flexibility, and debug accessibility are prioritized over raw performance.

FAQ

Does SAF-XC866L-4FRA BE support in-system programming via LIN?

Yes. The device includes a factory-programmed LIN Bootloader (LIN BSL) compliant with LIN 2.1, enabling firmware updates over the LIN bus using standard diagnostic protocols (e.g., UDS on LIN). No external debugger or JTAG interface is required for field reprogramming.

What is the maximum ADC sampling rate achievable with hardware triggering?

With timer-triggered conversions, the ADC achieves up to 100 kSPS (10 µs conversion time per sample). This rate assumes 10-bit resolution, internal reference, and no pipeline stalls - verified in the datasheet's "ADC Timing Characteristics" section (V1.2, p. 72).

Is the CCU6 unit capable of generating complementary PWM outputs with programmable dead time?

Yes. The CCU6 module supports center-aligned and edge-aligned PWM modes with independent dead-time insertion (adjustable in 12.5 ns steps) on complementary output pairs (e.g., CC60/CC61), essential for half-bridge motor driver control without external logic.

How does the memory protection scheme prevent unauthorized firmware access?

Protection is implemented via Flash lock bits that disable read-out of P-Flash/D-Flash contents and restrict write/erase operations to designated sectors. Once enabled, these bits are irreversible - confirmed in Section 25 of the datasheet (V1.2, p. 25) covering PASSWD.PASS register access control.