ATSAM4CMS8CA-AUR Equivalent & Substitute Parts

Part Overview

The ATSAM4CMS8CA-AUR is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller from Microchip Technology's SAM4CM series, featuring 512KB FLASH memory, 128KB RAM, and operation at 120MHz. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The primary substitute maintains identical electrical and mechanical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Series	SAM4CM
Core Processor	ARM Cortex-M4/M4F
Core Size	32-Bit Dual-Core
Speed	120MHz
Program Memory Size	512KB (512K x 8) FLASH
RAM Size	128K x 8
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.6V
Number of I/O	57
Package / Case	100-LQFP (14x14)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATSAM4CMS8CA-AUR is determined by strict equivalence across the following critical parameters:

Processor Architecture: ARM Cortex-M4/M4F dual-core configuration
Memory Configuration: 512KB FLASH and 128KB RAM
Operating Frequency: 120MHz
Supply Voltage Range: 1.62V ~ 3.6V
Package Format: 100-LQFP (14x14) surface mount
Peripheral Set: EBI/EMI, I2C, IrDA, SPI, UART/USART, DMA, LCD, PWM, WDT, Brown-out Detect/Reset, POR
I/O Count: 57 pins
Environmental Compliance: ROHS3 Compliant, REACH Unaffected

The ATSAM4CMS8CC-AUR qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility. The primary distinction is packaging format (Tape & Reel versus unspecified) and product status transition from obsolete to active.

Parameter Comparison

Parameter	ATSAM4CMS8CA-AUR	ATSAM4CMS8CC-AUR	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 Size	512KB (512K x 8) FLASH	512KB (512K x 8) FLASH	✓
RAM Size	128K x 8	128K x 8	✓
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.6V	1.62V ~ 3.6V	✓
Number of I/O	57	57	✓
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	✓
Package / Case	100-LQFP (14x14)	100-LQFP (14x14)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Obsolete	Active	Different
Packaging Format	Not specified	Tape & Reel (TR)	Different

Engineering Selection Recommendations

The ATSAM4CMS8CC-AUR is the direct equivalent substitute for the ATSAM4CMS8CA-AUR. Selection criteria are based on the following factors:

Product Status: The ATSAM4CMS8CA-AUR is classified as obsolete, creating supply chain risk and potential discontinuation of manufacturing support. The ATSAM4CMS8CC-AUR maintains active product status with Microchip Technology, ensuring continued availability and technical support.

Electrical Equivalence: All electrical parameters, including processor architecture, memory configuration, operating frequency, supply voltage range, peripheral set, and I/O count, are identical between the two devices.

Mechanical Compatibility: Both devices utilize the 100-LQFP (14x14) surface mount package, ensuring PCB footprint compatibility without redesign.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent substitution.

Packaging Consideration: The substitute is supplied in Tape & Reel format, which is standard for production environments and does not affect functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ATSAM4CMS8CC-AUR be used as a direct replacement for the ATSAM4CMS8CA-AUR without PCB modifications?

A: Yes. Both devices share identical electrical specifications and the same 100-LQFP (14x14) package footprint. No PCB redesign is required for substitution.

Q: What is the primary reason for substituting the ATSAM4CMS8CA-AUR?

A: The ATSAM4CMS8CA-AUR is classified as obsolete. The ATSAM4CMS8CC-AUR is the active equivalent, ensuring long-term availability and manufacturer support.

Q: Are there differences in memory capacity or processing speed between these parts?

A: No. Both devices feature 512KB FLASH memory, 128KB RAM, and operate at 120MHz. Memory and performance specifications are identical.

Q: Does the Tape & Reel packaging of the substitute affect compatibility?

A: No. Tape & Reel is a standard packaging format for production environments. The device itself is functionally and mechanially identical to the original part.

Q: Are both parts compliant with environmental and regulatory standards?

A: Yes. Both the ATSAM4CMS8CA-AUR and ATSAM4CMS8CC-AUR are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the operating temperature range for both devices?

A: Both devices operate across the temperature range of -40°C to 85°C (TA), supporting industrial and commercial applications.

Q: Are the peripheral sets identical between the two parts?

A: Yes. Both devices include identical connectivity options (EBI/EMI, I2C, IrDA, SPI, UART/USART) and peripheral features (DMA, LCD, PWM, WDT, Brown-out Detect/Reset, POR).

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