Infineon Technologies C167CSLMCAKXUMA3

Overview

C167CSLMCAKXUMA3 from Infineon Technologies is a 16-bit single-chip microcontroller featuring a 4-stage pipeline CPU, 32 KB on-chip mask ROM, 3 KB IRAM, 8 KB XRAM, dual CAN 2.0B interfaces (30 message objects), and a 24-channel 10-bit ADC with 7.8 µs conversion time. It operates at up to 40 MHz, supports PLL-based clock generation, and targets real-time industrial control systems requiring deterministic interrupt response and embedded networking.

For engineers reviewing the C167CSLMCAKXUMA3 datasheet, C167CSLMCAKXUMA3 pinout, C167CSLMCAKXUMA3 application, or C167CSLMCAKXUMA3 equivalent, key selection criteria include its dual-CAN capability, 111 GPIO lines with programmable thresholds, PEC-driven DMA, on-chip RTC, and support for external bus expansion up to 16 MB - all in a 144-pin MQFP package.

Technical Context

The C167CSLMCAKXUMA3 implements the C166 architecture with enhanced Boolean bit manipulation, register-based context switching, and 16 MByte linear address space unified for code and data. Its peripheral event controller (PEC) enables single-cycle data transfers across eight channels, decoupling CPU load from high-frequency I/O events like PWM updates or ADC sampling.

Two independent CAN controllers operate per ISO 11898 Rev. 2.0B, each supporting 15 message objects with full CAN and Basic CAN modes. The on-chip PLL provides selectable multiplication factors (1.5× to 5×), enabling precise clock synthesis from crystal or external sources while maintaining stable timing for CAN bit rates up to 1 Mbps.

Key Specifications

Pinout & Package

Package: 144-pin MQFP (Metric Quad Flat Package), lead-free, body size 20.0 × 20.0 mm, 0.5 mm pitch - confirmed per Infineon DS V2.2, p.76.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C167CSLMCAKXUMA3, SAK-C167CS-4R40M offers identical functionality under a different ordering code, while C167CR-LM trades mask-ROM permanence for higher clock speed and external program storage - making it appropriate for evolving firmware requirements but requiring additional memory design effort.

Availability

C167CSLMCAKXUMA3 is available at Aetrix Electronics and suitable for industrial PLC modules, automotive body control units, energy meter concentrators, and factory automation motion controllers requiring stable component supply and long-term lifecycle support.

Supply support for C167CSLMCAKXUMA3 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 electronics, and industrial control ICs, with global R&D and manufacturing infrastructure.

The C167CS belongs to Infineon's C166 microcontroller family, designed specifically for deterministic real-time control in harsh environments - emphasizing integrated peripherals, CAN networking, and robust power management for industrial and automotive applications.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time?

The C167CSLMCAKXUMA3 operates at up to 40 MHz CPU clock, delivering an instruction cycle time of 50 ns. At 33 MHz and 25 MHz, cycle times are 60 ns and 80 ns respectively. These values are measured under specified VDD and temperature conditions per Infineon DS V2.2, p.59.

Does this microcontroller support CAN FD or only classical CAN?

The C167CSLMCAKXUMA3 implements CAN protocol Rev. 2.0B only - supporting standard 11-bit identifiers and up to 1 Mbps bit rate. It does not support CAN FD features such as flexible data-rate or extended data length; CAN FD capability was introduced in later Infineon families like XMC4000.

How is the on-chip memory configured, and can it be reprogrammed?

This device contains 32 KB of mask-programmed ROM - fixed at fabrication and non-reprogrammable. It also integrates 3 KB of on-chip IRAM and 8 KB of XRAM, both volatile and fully accessible during runtime. No flash or EEPROM is present; firmware updates require replacement of the MCU.

Is there hardware support for USB or Ethernet connectivity?

No. The C167CSLMCAKXUMA3 lacks native USB or Ethernet MAC/PHY peripherals. Communication is limited to two CAN 2.0B interfaces, two serial channels (UART/SPI/SSC), and parallel external bus expansion. Adding USB/Ethernet requires external bridge ICs or companion controllers.