C164CI8RMCAKXUMA3 Equivalent & Substitute Parts

Part Overview

The C164CI8RMCAKXUMA3 is a 16-bit microcontroller from Infineon Technologies' C16xx series, featuring a C166 core processor operating at 20MHz with 64KB Mask ROM program memory. This device is classified as obsolete and is no longer in active production. Due to its obsolete status, sourcing original units becomes increasingly difficult. Identifying functionally equivalent or superior substitute components is essential for system redesign, legacy product support, and long-term supply chain continuity.

Substiute Parts

C164CI8RMCAKXUMA3

Infineon TechnologiesIn Stock: 802C164CI8RMCAKXUMA3 Datasheet

Current PartRFQ

XMC4400F100K512BAXQMA1

Infineon TechnologiesIn Stock: 1044XMC4400F100K512BAXQMA1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C164CI8RMCAKXUMA3 is based on the following criteria derived from the provided parameters:

Manufacturer Continuity: Both the original part and substitute are manufactured by Infineon Technologies, ensuring design philosophy and support ecosystem alignment.

Core Architecture Compatibility: The substitute part (XMC4400F100K512BAXQMA1) represents an architectural upgrade within the Infineon embedded microcontroller portfolio, transitioning from the legacy C166 16-bit architecture to the modern ARM Cortex-M4 32-bit architecture.

Memory Capacity: The substitute provides significantly expanded program memory (512KB FLASH versus 64KB Mask ROM) and RAM (80K x 8 versus 4K x 8), accommodating more complex firmware implementations.

Operating Voltage Range: The substitute operates at 3.13V ~ 3.63V, which differs from the original 4.75V ~ 5.5V specification. System-level voltage regulation must be evaluated during integration.

Connectivity and Peripherals: The substitute includes enhanced connectivity options (Ethernet, I2C, LINbus, USB in addition to CANbus, SPI, UART) and additional peripherals (DMA, I2S, LED support), providing functional superset coverage.

Data Conversion Capability: The substitute features superior analog-to-digital conversion (24x12b versus 8x10b) and adds digital-to-analog conversion (2x12b), expanding signal processing capabilities.

Package Consideration: The substitute uses 100-LQFP packaging versus the original 80-QFP, requiring PCB layout redesign.

Product Status: The substitute is active and in production, ensuring long-term availability and support.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The C164CI8RMCAKXUMA3 is obsolete, whereas XMC4400F100K512BAXQMA1 is active in production. For new designs or long-term product support, the active substitute is the appropriate selection.

Compliance and Certifications: Both parts maintain REACH Unaffected status. The substitute achieves ROHS3 compliance, meeting current regulatory requirements for electronic components in regulated markets.

Supply Chain Availability: The substitute part shows 938 units in stock versus 707 units for the obsolete original, indicating superior long-term availability and reduced supply risk.

Voltage Domain Redesign: System integration requires evaluation of the voltage supply difference (4.75V ~ 5.5V to 3.13V ~ 3.63V). Power supply architecture and peripheral interface voltage levels must be reassessed.

Package Footprint Change: Migration from 80-QFP to 100-LQFP requires PCB layout redesign. The increased pin count (100 versus 80) provides additional I/O and functional flexibility but demands board-level engineering effort.

Firmware Portability: The architectural transition from C166 16-bit to ARM Cortex-M4 32-bit requires firmware recompilation and validation. Existing C166 assembly code or architecture-specific implementations require porting.

Frequently Asked Questions (FAQ)

Q: Can the XMC4400F100K512BAXQMA1 directly replace the C164CI8RMCAKXUMA3 without design changes?

A: No. While both are Infineon microcontrollers with overlapping functionality, direct replacement is not possible due to package differences (80-QFP to 100-LQFP), voltage supply requirements (4.75V ~ 5.5V to 3.13V ~ 3.63V), and core architecture differences (16-bit C166 to 32-bit ARM Cortex-M4). PCB redesign and firmware porting are required.

Q: What are the key functional advantages of the substitute part?

A: The XMC4400F100K512BAXQMA1 provides 8x greater program memory (512KB versus 64KB), 20x greater RAM (80K x 8 versus 4K x 8), 6x faster clock speed (120MHz versus 20MHz), superior analog conversion (24x12b A/D and 2x12b D/A versus 8x10b A/D only), and expanded connectivity including Ethernet and USB.

Q: Is the substitute part pin-compatible with the original?

A: No. The substitute uses 100-LQFP packaging with 100 pins, whereas the original uses 80-QFP packaging with 80 pins. Pin assignments differ, requiring complete PCB redesign and schematic updates.

Q: What is the impact of the voltage supply difference?

A: The substitute operates at 3.13V ~ 3.63V versus the original 4.75V ~ 5.5V. Systems designed for 5V operation require voltage regulation or power supply redesign. Peripheral interface voltage levels must be verified for compatibility with 3.3V logic levels.

Q: Are there firmware compatibility considerations?

A: Yes. The original part uses the C166 16-bit architecture, while the substitute uses ARM Cortex-M4 32-bit architecture. Existing firmware must be recompiled and validated. Development tools, compiler support, and runtime libraries differ between architectures.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have MSL 3 (168 Hours), indicating identical moisture handling and storage requirements. Standard IPC-A-610 moisture control procedures apply to both components.

Q: Is the substitute part compliant with current regulatory standards?

A: Yes. The XMC4400F100K512BAXQMA1 is ROHS3 compliant and REACH Unaffected, meeting current regulatory requirements. The original obsolete part does not specify RoHS compliance status.