Infineon Technologies SAX-XC878-16FFA 5V AC

Overview

SAX-XC878-16FFA 5V AC 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 52 KB Flash, 3 KB XRAM, 256 B RAM, and 8 KB Boot ROM, with dual-voltage operation (5 V I/O, 2.5 V core via embedded regulator), and targets automotive body control modules requiring deterministic real-time response.

For engineers reviewing the SAX-XC878-16FFA 5V AC datasheet, SAX-XC878-16FFA 5V AC pinout, SAX-XC878-16FFA 5V AC application, or SAX-XC878-16FFA 5V AC equivalent, key selection considerations include its MultiCAN interface, 10-bit 8-channel ADC, CCU6 capture/compare unit for motor control timing, and LIN protocol support for automotive sub-networks.

Technical Context

The XC878 implements a two-clock-per-machine-cycle 8051-compatible CPU core with dual data pointers and hardware multiplication/division (MDU) plus CORDIC coprocessor for trigonometric computation acceleration. Its memory architecture separates 52 KB Flash (with bank pagination and password-protected write/erase) from 3 KB XRAM and 256 B internal RAM, enabling efficient code/data partitioning in safety-critical firmware.

Real-time peripheral integration includes three 16-bit timers (Timer 0/1/21), Timer 2's capture/compare unit, CCU6 for PWM generation with dead-time insertion, MultiCAN v2.0B controller supporting up to 16 message objects, and UART1 with LIN header transmission capability - all synchronized to a flexible clock system with PLL and multiple power-saving modes.

Key Specifications

Pinout & Package

Package: TQFP-64 (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SAK-TC1766-512F133HR BA and SAX-TC1121-16F64, the SAX-XC878-16FFA 5V AC delivers optimal balance of 8-bit determinism, integrated motor control peripherals (CCU6), and automotive-grade communication (MultiCAN + LIN hardware), making it purpose-built for cost-sensitive body electronics without sacrificing real-time precision.

Availability

SAX-XC878-16FFA 5V AC is available at Aetrix Electronics and suitable for automotive body control modules, motorized seat systems, roof modules, and smart HVAC actuators requiring stable component supply across multi-year production cycles.

Supply support for SAX-XC878-16FFA 5V AC 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 security solutions, with global R&D and manufacturing infrastructure.

The XC87x family was designed specifically for cost-optimized automotive body electronics, emphasizing integrated voltage regulation, LIN/CAN coexistence, and motor control peripherals to reduce system-level BOM and PCB area.

FAQ

Does SAX-XC878-16FFA 5V AC support CAN FD?

No. The device integrates MultiCAN v2.0B, which complies with ISO 11898-1:2003 and supports only classical CAN (up to 1 Mbps). CAN FD frame format, bit rate switching, and extended data length are not implemented in the hardware or register set.

What is the maximum operating frequency of the core clock?

The XC800 core operates at up to 26.67 MHz, achieved by configuring the internal PLL with a 10 MHz external crystal (PLL multiplier = 8, divider = 3). This frequency is confirmed in Section 4.3.3 (Power-on Reset and PLL Timing) of the datasheet.

Is external memory expansion supported?

Yes. Port 0 and Port 2 provide multiplexed address/data bus signals (AD0–AD7, A8–A15) enabling connection to external SRAM or EPROM up to 64 KB, as detailed in Section 2.3 (Pin Configuration) and Section 4.3.5 (External Data Memory Characteristics).

How is flash memory protected against unauthorized access?

Protection uses a two-tier scheme: (1) Flash bank-level write/erase lock bits controlled via Flash Registers, and (2) password-protected access to critical registers (e.g., FLASHCON0) requiring a 16-bit key written to the Password Register before modification, per Section 3.2.1.1.