ATSAM4CMS8CA-AU Equivalent & Substitute Parts

Part Overview

The ATSAM4CMS8CA-AU 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 active equivalent parts essential for ongoing design support and procurement continuity. The substitute part maintains identical electrical and mechanical specifications while offering improved availability through active product status.

Substiute Parts

ATSAM4CMS8CA-AU

Microchip TechnologyIn Stock: 1477ATSAM4CMS8CA-AU Datasheet

Current PartRFQ

ATSAM4CMS8CC-AU

Microchip TechnologyIn Stock: 4545ATSAM4CMS8CC-AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Series and Core Architecture: Both parts belong to the SAM4CM series with identical ARM Cortex-M4/M4F dual-core processor architecture
• Memory Configuration: Identical 512KB FLASH and 128KB RAM specifications
• Operating Frequency: Both operate at 120MHz
• Electrical Specifications: Matching voltage supply range (1.62V ~ 3.6V) and operating temperature range (-40°C ~ 85°C)
• Package and Pinout: Both use 100-LQFP (14x14) surface mount package with 57 I/O pins
• Connectivity and Peripherals: Identical EBI/EMI, I2C, IrDA, SPI, UART/USART connectivity and peripheral set (Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT)
• Compliance: Both meet ROHS3 compliance and REACH unaffected status

The substitute part differs only in product status (Active vs. Obsolete) and packaging format (Tray vs. standard), with no functional or electrical deviation.

Parameter Comparison

Engineering Selection Recommendations

The ATSAM4CMS8CC-AU is a direct functional equivalent to the ATSAM4CMS8CA-AU with no electrical or mechanical deviation. Selection of the substitute part is justified by product status: the original part is obsolete, while the substitute maintains active status with Microchip Technology. Both parts maintain identical ROHS3 compliance and REACH unaffected certification. The substitute part offers superior procurement continuity and supply chain reliability for new designs and ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Are the ATSAM4CMS8CA-AU and ATSAM4CMS8CC-AU pin-compatible?

A: Yes. Both parts use the 100-LQFP (14x14) package with identical pinout and 57 I/O pins. No PCB redesign is required for substitution.

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

A: The parts are electrically and functionally identical. The primary difference is product status: ATSAM4CMS8CA-AU is obsolete, while ATSAM4CMS8CC-AU is active. The packaging format differs (standard vs. Tray), but this does not affect component functionality.

Q: Can I use ATSAM4CMS8CC-AU as a drop-in replacement in existing designs?

A: Yes. The substitute part maintains all electrical specifications, memory configuration, operating frequency, voltage supply range, temperature range, and peripheral functionality. No firmware or hardware modifications are required.

Q: Are both parts RoHS compliant?

A: Yes. Both ATSAM4CMS8CA-AU and ATSAM4CMS8CC-AU are ROHS3 compliant and REACH unaffected.

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

A: Both parts have a Moisture Sensitivity Level (MSL) of 3 with a 168-hour floor life rating.