Infineon Technologies SAF-XC161CJ-16F20F BB

Overview

SAF-XC161CJ-16F20F BB from Infineon Technologies is a 16-bit single-chip microcontroller based on the C166SV2 core, featuring 128 KB on-chip Flash, 8 KB total SRAM (2 KB DPRAM + 4 KB DSRAM + 2 KB PSRAM), and integrated TwinCAN 2.0B interface with 32 message objects across two CAN nodes. It operates from -40 °C to +85 °C and supports 20 MHz CPU clock (50 ns instruction cycle). It targets automotive body control modules requiring real-time I/O, CAN networking, and deterministic interrupt response.

For engineers reviewing the SAF-XC161CJ-16F20F BB datasheet, SAF-XC161CJ-16F20F BB pinout, SAF-XC161CJ-16F20F BB application, or SAF-XC161CJ-16F20F BB equivalent, key selection criteria include its 144-pin TQFP package, dual ASC/SSC serial interfaces, 12-channel 10-bit ADC with 2.55 µs conversion time, and JTAG-based on-chip debug support for embedded firmware development.

Technical Context

The XC161CJ-16F20F BB implements a 5-stage pipelined C166SV2 CPU core with single-cycle 16×16 multiply and MAC instructions, enabling deterministic real-time control in motor drive and gateway applications. Its memory subsystem includes separate program/data SRAM banks and dual-port RAM for concurrent CPU/peripheral access without arbitration stalls.

Peripheral integration centers on deterministic timing: the GPT12E timer unit provides five independent timers with capture/compare capability; the TwinCAN module supports full CAN protocol handling with hardware message filtering and gateway functionality between CAN0 and CAN1; and the PEC enables zero-overhead, interrupt-driven data transfers across 24-bit address space.

Key Specifications

Pinout & Package

SAF-XC161CJ-16F20F BB is housed in a 144-pin green TQFP package (RoHS compliant), 20 × 20 mm body, 0.5 mm lead pitch, with exposed thermal pad. Pin definitions are validated per Infineon Data Sheet V2.4 (2006), Section 2.2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.

Compared with SAK-XC161CJ-16F20F, the SAF variant trades extended temperature rating for cost-sensitive cabin applications; versus XC2267M, it offers proven toolchain compatibility and lower power consumption at the expense of protocol and performance scalability.

Availability

SAF-XC161CJ-16F20F BB is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster gateways, engine bay sensor hubs, and electric power steering monitors requiring stable component supply across multi-year production cycles.

Supply support for SAF-XC161CJ-16F20F BB 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 XC161 family was designed specifically for cost-sensitive, real-time automotive applications requiring deterministic interrupt handling, integrated CAN, and robust operation in harsh environments - forming the foundation for Infineon's C166-based ECU platforms through the 2000s.

FAQ

What is the maximum operating frequency of the SAF-XC161CJ-16F20F BB CPU?

The SAF-XC161CJ-16F20F BB supports a maximum CPU clock frequency of 20 MHz, yielding a 50 ns instruction cycle time. This is achieved using the on-chip PLL with external crystal input (e.g., 10 MHz crystal ×2 PLL factor). The device does not support frequencies above 20 MHz - exceeding this violates AC timing specifications per Data Sheet V2.4, Section 4.4.

Does the SAF-XC161CJ-16F20F BB support CAN FD?

No. The SAF-XC161CJ-16F20F BB integrates TwinCAN Rev. 2.0B compliant with ISO 11898-1:2003, supporting only Classical CAN (up to 1 Mbit/s) with 11-bit identifiers. It lacks CAN FD features such as flexible data rate, extended identifiers, or payload lengths beyond 8 bytes - confirmed in Section 3.13 of the 2006 datasheet.

How many I/O pins are available for general-purpose use?

The SAF-XC161CJ-16F20F BB provides up to 99 general-purpose I/O lines across Ports 0–2 and additional dedicated pins. Not all 144 pins are GPIO: 16 pins are power/ground, 4 are JTAG, 2 are crystal, and others serve fixed peripheral functions (e.g., CAN TX/RX). Actual usable GPIO count depends on peripheral configuration - typical designs allocate 72–85 pins for user I/O.

Is the on-chip Flash memory field-programmable via standard interfaces?

Yes. The 128 KB Flash supports in-system programming via the on-chip bootstrap loader using ASC0 UART at baud rates up to 115.2 kbit/s. No external programmer is needed - verified in Section 1 and Table 1 of the datasheet. Flash erase/write operations require specific command sequences and voltage supervision, but no special hardware interface beyond UART.