Infineon Technologies SAF-XC866-4FRI 3V BE

Overview

SAF-XC866-4FRI 3V 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, 256 bytes RAM, 512 bytes XRAM, and an integrated 8-channel 10-bit ADC. It operates at 3.3 V supply with core logic powered by an embedded 2.5 V regulator, and targets industrial motor control and sensor interface applications.

For engineers reviewing the SAF-XC866-4FRI 3V BE datasheet, SAF-XC866-4FRI 3V BE pinout, SAF-XC866-4FRI 3V BE application, or SAF-XC866-4FRI 3V BE equivalent, key selection factors include its 16-bit CCU6 PWM unit, on-chip debug support via 1 KB monitor ROM, LIN Bootloader absence, and -40 to +85 °C industrial temperature grade in PG-TSSOP-38 package.

Technical Context

The XC866 implements a two-clock-per-machine-cycle 8051-compatible core with dual data pointers and dedicated hardware for motor control timing: the 16-bit Capture/Compare Unit (CCU6) supports center-aligned PWM, dead-time insertion, and emergency shutdown. Its clock system integrates an on-chip oscillator and PLL with loss-of-lock detection.

Power management includes three low-power modes (slow-down, idle, power-down), wake-up via RXD or EXINT0, and per-peripheral clock gating. Reset sources include power-on, hardware, brownout (for 2.5 V core), watchdog, and power-down wake-up reset - all confirmed in V1.2 datasheet sections 2.3 and 3.1.

Key Specifications

Pinout & Package

SAF-XC866-4FRI 3V BE is housed in a PG-TSSOP-38 package (38-pin, 0.5 mm pitch, exposed thermal pad). Pin functions are defined per Figure 1 and Table 3–7 of the V1.2 datasheet, with Port 0 (P0.0–P0.7), Port 1 (P1.0–P1.7), Port 2 (P2.0–P2.3), Port 3 (P3.0–P3.3), plus dedicated pins for XTAL1/XTAL2, VDD/VSS, VDDP/VSSP, RESET, EXINT0, RXD/TXD, SSC, and CCU6 signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SAF-XC866-4FRI 3V BE, the XC886 adds CAN and performance but increases BOM cost; the STM8S105 lacks CCU6-level motor timing control, making it unsuitable for high-reliability BLDC commutation without significant firmware overhead.

Availability

SAF-XC866-4FRI 3V BE is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, power supply monitoring, and PLC I/O modules requiring stable component supply across extended product lifecycles.

Supply support for SAF-XC866-4FRI 3V 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, and industrial control ICs, with headquarters in Munich and global R&D and manufacturing facilities.

The XC866 belongs to the XC800 family - designed specifically for cost-sensitive, high-reliability industrial motor control and sensor interfacing applications where integrated PWM, ADC, and low-power operation are essential.

FAQ

Does SAF-XC866-4FRI 3V BE support LIN communication?

No. The SAF-XC866-4FRI 3V BE does not integrate a LIN transceiver or LIN Bootloader (LIN BSL). According to Table 1 in the V1.2 datasheet, only XC866L variants include LIN BSL support. This device relies on UART for serial communication and requires an external LIN transceiver for LIN bus compliance.

What is the function of the VDDP and VSSP pins?

VDDP and VSSP supply power and ground exclusively to the I/O port circuitry at 3.3 V. They are electrically isolated from the core logic supply (VDD/VSS at 2.5 V) to prevent digital switching noise from coupling into the analog and core domains - critical for ADC accuracy and stable CPU operation.

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

Yes. The 4 KB D-Flash is explicitly designated for data storage and supports byte-wise erase/write operations via the on-chip Flash controller. Infineon's Application Note AP20022 confirms its use for EEPROM emulation in XC800 devices, including wear-leveling routines compatible with the SAF-XC866-4FRI 3V BE's Flash architecture.

Is the CCU6 unit available on all XC866 variants?

Yes. The 16-bit Capture/Compare Unit (CCU6) is a fixed feature across all XC866 devices, including SAF-XC866-4FRI 3V BE. It is documented in Section 12 of the V1.2 datasheet and appears in the functional block diagram (Figure 1), confirming hardware presence regardless of Flash/ROM configuration or temperature grade.