ATSAM4CMS32CA-AU Equivalent & Substitute Parts

Part Overview

The ATSAM4CMS32CA-AU is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller from Microchip Technology's SAM4CM series, featuring 2MB of FLASH memory, 256KB of RAM, and 57 I/O pins in a 100-LQFP package. The device operates at 120MHz with integrated connectivity interfaces including EBI/EMI, I2C, IrDA, SPI, and UART/USART. This part is currently listed as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

ATSAM4CMS32CA-AU

Microchip TechnologyIn Stock: 971ATSAM4CMS32CA-AU Datasheet

Current PartRFQ

ATSAM4CMS32CB-AU

Microchip TechnologyIn Stock: 1102ATSAM4CMS32CB-AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATSAM4CMS32CA-AU is determined by strict equivalence across the following critical parameters:

• Core processor architecture and instruction set (ARM Cortex-M4/M4F)
• Memory configuration (2MB FLASH, 256KB RAM)
• Operating frequency (120MHz)
• I/O pin count (57)
• Package form factor (100-LQFP 14x14)
• Voltage supply range (1.62V ~ 3.6V)
• Connectivity interfaces (EBI/EMI, I2C, IrDA, SPI, UART/USART)
• Peripheral feature set (Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT)
• Data converter specifications (A/D 6x10b)
• Operating temperature range (-40°C ~ 85°C)
• Compliance certifications (RoHS3, REACH Unaffected)

The ATSAM4CMS32CB-AU meets all substitution criteria as a direct equivalent within the SAM4CM series, with identical electrical and mechanical specifications. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The ATSAM4CMS32CB-AU is a direct functional equivalent to the ATSAM4CMS32CA-AU with identical electrical specifications and pin configuration. Selection of the ATSAM4CMS32CB-AU is supported by its active product status, ensuring long-term availability and supply chain continuity. Both devices maintain equivalent compliance certifications including RoHS3 and REACH Unaffected status, with matching moisture sensitivity levels appropriate for standard surface-mount assembly processes.

The distinction between these parts is limited to packaging format (tube versus tray) and product lifecycle status. For new designs or ongoing production requiring component procurement, the ATSAM4CMS32CB-AU provides superior supply reliability while maintaining complete electrical and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Are the ATSAM4CMS32CA-AU and ATSAM4CMS32CB-AU pin-for-pin compatible?

A: Yes. Both devices feature identical 100-LQFP (14x14) packages with 57 I/O pins in the same configuration. PCB layouts and footprints are directly interchangeable.

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

A: The primary differences are product status and packaging format. The ATSAM4CMS32CA-AU is obsolete and supplied in tube packaging, while the ATSAM4CMS32CB-AU is active and supplied in tray packaging. All electrical and mechanical specifications are identical.

Q: Can I use ATSAM4CMS32CB-AU as a replacement in existing designs using ATSAM4CMS32CA-AU?

A: Yes. The ATSAM4CMS32CB-AU is a direct substitute with no design modifications required. Firmware and hardware interfaces remain unchanged.

Q: Are there any compliance or certification differences between these parts?

A: No. Both devices carry identical RoHS3 compliance and REACH Unaffected status. Moisture sensitivity levels (MSL 3, 168 hours) are equivalent.

Q: What is the significance of the product status difference?

A: The active status of ATSAM4CMS32CB-AU indicates ongoing manufacturing and supply availability. The obsolete status of ATSAM4CMS32CA-AU indicates end-of-life status with limited procurement options.