ATSAM4CMP16CA-AU Equivalent & Substitute Parts

Part Overview

The ATSAM4CMP16CA-AU is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller from Microchip Technology's SAM4CM series, featuring 1MB of FLASH memory, 128KB of RAM, and 52 I/O pins in a 100-LQFP package. The device operates at 120MHz with integrated connectivity interfaces including SPI, UART/USART, I2C, and IrDA, along with peripheral functions such as DMA, PWM, LCD controller, and watchdog timer.

The ATSAM4CMP16CA-AU is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this microcontroller.

Key Parameters

Parameter	Value
Core Processor	ARM Cortex-M4/M4F
Core Size	32-Bit Dual-Core
Speed	120MHz
Program Memory Size	1MB (1M x 8) FLASH
RAM Size	128K x 8
Number of I/O	52
Voltage Supply Range	1.62V ~ 3.6V
Package Type	100-LQFP (14x14)
Operating Temperature	-40°C ~ 85°C
Connectivity	EBI/EMI, I2C, IrDA, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
Data Converters	A/D 6x10b
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATSAM4CMP16CA-AU is determined by strict equivalence across the following critical parameters:

Processor Architecture: ARM Cortex-M4/M4F dual-core configuration
Memory Configuration: 1MB FLASH and 128KB RAM
Clock Speed: 120MHz operation
I/O Count: 52 I/O pins
Package Format: 100-LQFP (14x14) surface mount
Voltage Range: 1.62V ~ 3.6V supply compatibility
Connectivity Interfaces: EBI/EMI, I2C, IrDA, SPI, UART/USART
Peripheral Set: DMA, LCD controller, PWM, watchdog timer, brown-out detection, power-on reset
Compliance: ROHS3 and REACH compliance status

The ATSAM4CMP16CC-AU meets all these criteria and is classified as a direct substitute within the SAM4CM series.

Parameter Comparison

Parameter	ATSAM4CMP16CA-AU	ATSAM4CMP16CC-AU	Match
Manufacturer	Microchip Technology	Microchip Technology	✓
Series	SAM4CM	SAM4CM	✓
Core Processor	ARM Cortex-M4/M4F	ARM Cortex-M4/M4F	✓
Core Size	32-Bit Dual-Core	32-Bit Dual-Core	✓
Speed	120MHz	120MHz	✓
Program Memory	1MB (1M x 8) FLASH	1MB (1M x 8) FLASH	✓
RAM Size	128K x 8	128K x 8	✓
Number of I/O	52	52	✓
Voltage Supply	1.62V ~ 3.6V	1.62V ~ 3.6V	✓
Data Converters	A/D 6x10b	A/D 6x10b	✓
Oscillator Type	Internal	Internal	✓
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	✓
Package / Case	100-LQFP (14x14)	100-LQFP (14x14)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Connectivity	EBI/EMI, I2C, IrDA, SPI, UART/USART	EBI/EMI, I2C, IrDA, SPI, UART/USART	✓
Peripherals	Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT	Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

The ATSAM4CMP16CC-AU is a direct functional equivalent to the ATSAM4CMP16CA-AU. Both devices share identical electrical specifications, memory configuration, I/O count, and peripheral functionality. The primary distinction is product status: the ATSAM4CMP16CA-AU is obsolete, while the ATSAM4CMP16CC-AU maintains active status with Microchip Technology.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy product support. The ATSAM4CMP16CC-AU is supplied in Tray packaging, whereas the original part number does not specify packaging format. Pin-for-pin compatibility and identical package geometry (100-LQFP 14x14) ensure direct PCB-level substitution without design modification.

For applications currently using the ATSAM4CMP16CA-AU, transition to the ATSAM4CMP16CC-AU is supported by full electrical and mechanical equivalence, with no firmware or software changes required.

Frequently Asked Questions (FAQ)

Q: Are the ATSAM4CMP16CA-AU and ATSAM4CMP16CC-AU pin-compatible?

A: Yes. Both devices use the 100-LQFP (14x14) package with identical pin assignments, voltage levels, and signal definitions. Direct PCB substitution is supported without layout modification.

Q: What is the difference between these two part numbers?

A: The ATSAM4CMP16CA-AU is classified as obsolete, while the ATSAM4CMP16CC-AU maintains active product status. All electrical, memory, and functional specifications are identical. The substitute part is supplied in Tray packaging.

Q: Can I use the ATSAM4CMP16CC-AU as a drop-in replacement?

A: Yes. The ATSAM4CMP16CC-AU is a direct substitute with no design changes required. Firmware compiled for the ATSAM4CMP16CA-AU executes without modification on the ATSAM4CMP16CC-AU.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the ATSAM4CMP16CA-AU and ATSAM4CMP16CC-AU are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the moisture sensitivity level for these devices?

A: Both parts have a Moisture Sensitivity Level (MSL) of 3, with a floor life of 168 hours. Standard moisture control procedures during storage and handling apply.

Q: Are there any differences in operating temperature range?

A: No. Both devices operate across the identical temperature range of -40°C to 85°C (TA), supporting industrial and extended temperature applications.

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