ATSAM4C8CA-AUR Equivalent & Substitute Parts

Part Overview

The ATSAM4C8CA-AUR is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller from Microchip Technology's SAM4C series, featuring 512KB FLASH memory, 128KB RAM, and operation at 120MHz. The device integrates comprehensive connectivity options including EBI/EMI, I2C, IrDA, SPI, and UART/USART interfaces, along with peripherals such as DMA, LCD controller, PWM, and watchdog timer functionality. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity.

Key Parameters

Parameter	Value
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	74
Data Converters	A/D 8x10b
Connectivity	EBI/EMI, I2C, IrDA, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
Package / Case	100-LQFP (14x14)
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATSAM4C8CA-AUR is determined by strict equivalence across the following critical parameters:

Core Architecture: ARM Cortex-M4/M4F 32-bit dual-core processor
Memory Configuration: 512KB FLASH and 128KB RAM
Operating Frequency: 120MHz
Supply Voltage Range: 1.62V ~ 3.6V
I/O Count: 74 pins
Peripheral Set: Complete feature parity including DMA, LCD controller, PWM, and watchdog timer
Package: 100-LQFP (14x14) surface mount
Thermal Range: -40°C ~ 85°C
Compliance: ROHS3 and REACH requirements

The ATSAM4C8CB-AUR qualifies as a direct substitute based on identical electrical specifications, memory configuration, peripheral integration, and package form factor. The primary distinction is packaging format and product status.

Parameter Comparison

Parameter	ATSAM4C8CA-AUR	ATSAM4C8CB-AUR	Match
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	74	74	✓
Data Converters	A/D 8x10b	A/D 8x10b	✓
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)	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Mounting Type	Surface Mount	Surface Mount	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
Product Status	Obsolete	Active	Substitute is Active
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Different Format

Engineering Selection Recommendations

The ATSAM4C8CB-AUR is the direct functional equivalent of the ATSAM4C8CA-AUR. Both devices share identical electrical specifications, memory architecture, peripheral integration, and thermal operating range. The substitute part maintains full ROHS3 compliance and REACH compliance status.

The primary distinction between the two parts is product lifecycle status and packaging format. The ATSAM4C8CA-AUR is classified as obsolete, while the ATSAM4C8CB-AUR maintains active product status with current manufacturing support. The ATSAM4C8CB-AUR is supplied in Cut Tape and Digi-Reel packaging format, whereas the original part was supplied in Tape & Reel format. Both packaging formats are suitable for automated assembly processes and provide equivalent moisture protection under the MSL 3 classification.

For new designs and production continuity, the ATSAM4C8CB-AUR is the appropriate selection due to its active status and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Are the ATSAM4C8CA-AUR and ATSAM4C8CB-AUR pin-compatible?

A: Yes. Both devices utilize the 100-LQFP (14x14) package with identical pin assignments, I/O configuration (74 pins), and electrical characteristics. Direct PCB footprint compatibility is confirmed.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels for high-volume automated assembly. Cut Tape (CT) and Digi-Reel packaging provide the same components in smaller quantities or alternative reel formats. Both formats maintain identical moisture sensitivity levels and component integrity for surface mount assembly.

Q: Can the ATSAM4C8CB-AUR be used as a direct replacement in existing designs?

A: Yes. The ATSAM4C8CB-AUR provides complete functional equivalence with identical memory, processing capability, peripheral set, and electrical specifications. No design modifications are required for substitution.

Q: Why is the ATSAM4C8CA-AUR classified as obsolete?

A: Product obsolescence reflects Microchip Technology's lifecycle management. The ATSAM4C8CB-AUR represents the active equivalent within the SAM4C series and is the recommended selection for ongoing production and new designs.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the ATSAM4C8CA-AUR and ATSAM4C8CB-AUR maintain ROHS3 compliance and REACH compliance status, meeting current environmental and regulatory standards.

Q: What is the moisture sensitivity level, and how does it affect handling?

A: Both parts carry MSL 3 classification with a 168-hour floor life. This indicates standard moisture sensitivity requiring storage in controlled humidity environments and adherence to standard moisture-sensitive device handling procedures during assembly.

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