ATSAM4CMS4CB-AU Equivalent & Substitute Parts

Part Overview

The ATSAM4CMS4CB-AU is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller from Microchip Technology's SAM4CM series, featuring 256KB 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 ATSAM4CMS4CC-AU maintains identical electrical and mechanical specifications while offering active product status.

Substiute Parts

ATSAM4CMS4CB-AU

Microchip TechnologyIn Stock: 2369ATSAM4CMS4CB-AU Datasheet

Current PartRFQ

ATSAM4CMS4CC-AU

Microchip TechnologyIn Stock: 817ATSAM4CMS4CC-AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ATSAM4CMS4CC-AU qualifies as a direct substitute based on the following criteria:

Electrical Parameters Match:

• Identical core processor architecture (ARM Cortex-M4/M4F)
• Identical core size (32-Bit Dual-Core)
• Identical operating frequency (120MHz)
• Identical program memory (256KB FLASH)
• Identical RAM capacity (128KB)
• Identical voltage supply range (1.62V ~ 3.6V)
• Identical data converter specification (A/D 6x10b)
• Identical I/O count (57 pins)
• Identical connectivity interfaces (EBI/EMI, I2C, IrDA, SPI, UART/USART)
• Identical peripheral set (Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT)
• Identical operating temperature range (-40°C ~ 85°C)

Mechanical Parameters Match:

• Identical package type (100-LQFP)
• Identical package dimensions (14x14)
• Identical mounting type (Surface Mount)

Compliance Parameters Match:

• RoHS3 Compliant
• REACH Unaffected
• Identical MSL rating (3, 168 Hours)

The substitution is valid because all electrical, mechanical, and compliance parameters are identical between the main part and substitute part.

Parameter Comparison

Engineering Selection Recommendations

The ATSAM4CMS4CC-AU is the appropriate selection for new designs and ongoing procurement due to its active product status. The ATSAM4CMS4CB-AU, classified as obsolete, presents supply chain risk and limited long-term availability.

Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The identical electrical and mechanical specifications ensure direct functional equivalence in circuit design and PCB layout.

For applications currently using the ATSAM4CMS4CB-AU, transition to the ATSAM4CMS4CC-AU requires no design modifications. Pin configuration, electrical characteristics, and package footprint remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can ATSAM4CMS4CC-AU replace ATSAM4CMS4CB-AU in existing designs?

A: Yes. All electrical parameters, mechanical specifications, and pin configurations are identical. No circuit or PCB layout modifications are required.

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

A: The primary difference is product status. ATSAM4CMS4CB-AU is obsolete, while ATSAM4CMS4CC-AU is active. The packaging differs (unspecified for CB-AU versus Tray for CC-AU), but electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with the 100-LQFP package?

A: No. Both parts use the identical 100-LQFP (14x14) package with surface mount configuration. PCB footprints and assembly processes remain unchanged.

Q: Do these parts meet RoHS and REACH compliance?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected. Both carry MSL rating 3 (168 Hours).

Q: What is the supply status for each part?

A: ATSAM4CMS4CB-AU is obsolete with limited availability. ATSAM4CMS4CC-AU is active with current inventory support.

Q: Are firmware or software changes needed when switching between these parts?

A: No. Identical processor architecture, memory configuration, and peripheral set ensure complete software compatibility.