C161KLMHAFXQMA1

Overview

The C161KLMHAFXQMA1 is a 16-bit microcontroller from the Infineon C166 family, operating at a maximum clock frequency of 20 MHz. It features a ROMless architecture with 1 kB of data RAM and utilizes an MQFP-80 package. The device supports ASC and SSC interfaces and includes three timers/counters. It does not contain an integrated ADC. This component is classified as obsolete and no longer manufactured.

Feature Summary

• ROMless memory architecture for flexible code storage
• Integration of ASC and SSC communication interfaces
• Three dedicated timer/counter units

Applications

• Automotive control systems requiring 16-bit processing
• Industrial applications utilizing SSC interface protocols
• General embedded control tasks within the C166 ecosystem

Procurement Notes

This component is officially marked as obsolete and no longer manufactured by Infineon Technologies. Procurement should focus on verifying the authenticity of remaining stock from authorized distributors or third-party suppliers. Buyers must confirm that the specific batch matches the required automotive qualification standards (AQS) associated with the suffix. Due to end-of-life status, long-term supply agreements are unavailable, and replacement planning is strongly recommended.

Selection Notes

Designers should evaluate the C161KLMHAFXQMA1 only for maintenance or legacy system repairs where backward compatibility with the C166 architecture is mandatory. For new designs, the absence of manufacturing support necessitates selecting active alternatives. Consider the lack of an onboard ADC when defining peripheral requirements. Verify that the 20 MHz speed and 1 kB RAM meet the specific application's computational and memory constraints before proceeding.

Part Context

The C161KLMHAFXQMA1 belongs to the C161K/O derivative series within the broader C166 family of single-chip CMOS microcontrollers. This family is known for high CPU performance and is widely used in automotive and industrial sectors. The specific model represents a variant optimized for applications requiring external memory expansion due to its ROMless nature, distinguishing it from versions with internal program memory.

Replacement Considerations

Infineon lists XMC4200F64K256BAXQSA1 as a similar available substitute. Engineers must verify pinout compatibility and software migration efforts when transitioning from the legacy C166 core to the newer XMC architecture.