C161PILM3VCABXUMA1 Equivalent & Substitute Parts

Part Overview

The C161PILM3VCABXUMA1 is a 16-bit C166 microcontroller IC manufactured by Infineon Technologies, featuring a ROMless architecture with 20MHz operation and 3K x 8 RAM. This device is classified as obsolete, making equivalent or substitute parts necessary for new designs or production continuity. The part operates within a 3V to 3.6V supply range and includes integrated peripherals such as PWM, WDT, and POR functionality across 76 I/O pins in a 100-pin MQFP package.

Key Parameters

Parameter	Value
Manufacturer	Infineon Technologies
Core Processor	C166
Core Size	16-Bit
Speed	20MHz
Program Memory Type	ROMless
RAM Size	3K x 8
Voltage Supply (Vcc/Vdd)	3V ~ 3.6V
Number of I/O	76
Package / Case	100-BQFP
Product Status	Obsolete
Operating Temperature	0°C ~ 70°C (TA)

Substitute Part Grouping Explanation

The XMC4400F100K512BAXQMA1 is identified as a manufacturer-recommended substitute for the C161PILM3VCABXUMA1. Substitution is based on the following allowed parameters:

Both devices are manufactured by Infineon Technologies
Both feature 100-pin surface mount packages (MQFP and LQFP variants)
Both support identical connectivity protocols: I2C, SPI, UART/USART
Both include common peripheral functions: POR, PWM, WDT
Both operate within overlapping voltage supply ranges (3.13V ~ 3.63V for substitute vs. 3V ~ 3.6V for original)
Both are classified with identical Moisture Sensitivity Level (MSL 3, 168 Hours)
Both share the same HTSUS classification (8542.31.0001)

The substitute represents a functional upgrade path from the obsolete C166 architecture to the active XMC4000 series, maintaining package compatibility and core peripheral functionality.

Parameter Comparison

Parameter	C161PILM3VCABXUMA1	XMC4400F100K512BAXQMA1
Manufacturer	Infineon Technologies	Infineon Technologies
Core Processor	C166	ARM® Cortex®-M4
Core Size	16-Bit	32-Bit Single-Core
Speed	20MHz	120MHz
Program Memory Type	ROMless	FLASH (512KB)
RAM Size	3K x 8	80K x 8
Voltage Supply (Vcc/Vdd)	3V ~ 3.6V	3.13V ~ 3.63V
Number of I/O	76	55
Package / Case	100-BQFP	100-LQFP Exposed Pad
Connectivity	EBI/EMI, I2C, SPI, UART/USART	CANbus, Ethernet, I2C, LINbus, SPI, UART, USB
Peripherals	POR, PWM, WDT	DMA, I2S, LED, POR, PWM, WDT
Data Converters	A/D 4x10b	A/D 24x12b, D/A 2x12b
Operating Temperature	0°C ~ 70°C (TA)	-40°C ~ 125°C (TA)
Product Status	Obsolete	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
HTSUS	8542.31.0001	8542.31.0001

Engineering Selection Recommendations

The XMC4400F100K512BAXQMA1 is the manufacturer-recommended substitute for the obsolete C161PILM3VCABXUMA1. Selection of this substitute is supported by:

Active product status ensures long-term availability and supply chain continuity
ROHS3 compliance of the substitute meets current regulatory requirements
Identical MSL rating (3, 168 Hours) maintains handling and storage compatibility
Shared REACH Unaffected status preserves regulatory alignment
Both devices carry the same HTSUS classification for tariff purposes

The substitute provides enhanced capabilities including 32-bit processing, 512KB FLASH memory, expanded I/O connectivity (CANbus, Ethernet, USB), and extended operating temperature range (-40°C to 125°C). These improvements support modern embedded system requirements while maintaining core peripheral compatibility through shared I2C, SPI, UART, PWM, and WDT functionality.

Frequently Asked Questions (FAQ)

Q: Why is the C161PILM3VCABXUMA1 being replaced? A: The C161PILM3VCABXUMA1 is classified as obsolete. The XMC4400F100K512BAXQMA1 is the manufacturer-recommended active substitute that maintains functional compatibility while providing enhanced performance and extended availability.

Q: Are the packages physically compatible? A: Both devices use 100-pin surface mount packages (MQFP and LQFP variants). While pin counts are identical, the substitute uses LQFP with exposed pad versus MQFP. PCB layout and footprint verification is required for direct replacement.

Q: What are the key differences in memory architecture? A: The original part is ROMless with 3K x 8 RAM. The substitute features 512KB FLASH memory and 80K x 8 RAM, providing significantly expanded program and data storage capacity.

Q: Are voltage supply ranges compatible? A: Yes. The original operates at 3V to 3.6V, while the substitute operates at 3.13V to 3.63V. The ranges overlap sufficiently for most applications, though power supply design should account for the substitute's slightly higher minimum voltage requirement.

Q: Does the substitute support the same communication protocols? A: The substitute supports all original protocols (I2C, SPI, UART) plus additional interfaces (CANbus, Ethernet, LINbus, USB), providing backward compatibility with enhanced connectivity options.

Q: What is the operating temperature difference? A: The original operates from 0°C to 70°C. The substitute extends this to -40°C to 125°C, enabling use in wider environmental conditions.

Q: Are there differences in I/O pin count? A: The original provides 76 I/O pins, while the substitute provides 55 I/O pins. Application designs must account for reduced I/O availability when migrating to the substitute.

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