ATSAM3S1CA-CU Equivalent & Substitute Parts

Part Overview

The ATSAM3S1CA-CU is an ARM Cortex-M3 SAM3S microcontroller IC manufactured by Microchip Technology, featuring 32-bit single-core architecture operating at 64MHz with 64KB FLASH memory and 16KB RAM. This device is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity.

Substiute Parts

ATSAM3S1CA-CU

Microchip TechnologyIn Stock: 1017ATSAM3S1CA-CU Datasheet

Current PartRFQ

ATSAM3S1CB-CU

Microchip TechnologyIn Stock: 3092ATSAM3S1CB-CU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ATSAM3S1CB-CU qualifies as a direct substitute for the ATSAM3S1CA-CU based on the following critical parameters:

• Identical core processor architecture (ARM Cortex-M3)
• Matching core size (32-Bit Single-Core)
• Identical operating frequency (64MHz)
• Identical program memory configuration (64KB FLASH)
• Identical RAM capacity (16K x 8)
• Identical I/O count (79 pins)
• Identical voltage supply range (1.62V ~ 3.6V)
• Identical data converter specifications (A/D 15x10/12b; D/A 2x12b)
• Identical operating temperature range (-40°C ~ 85°C)
• Identical package form factor (100-TFBGA 9x9)
• Identical RoHS and MSL compliance ratings

The primary distinction is product status: ATSAM3S1CA-CU is obsolete while ATSAM3S1CB-CU maintains active production status.

Parameter Comparison

Engineering Selection Recommendations

The ATSAM3S1CB-CU is the direct functional equivalent for the obsolete ATSAM3S1CA-CU. Both devices share identical electrical specifications, pin configurations, and mechanical packaging. The ATSAM3S1CB-CU maintains active production status with confirmed inventory availability (3000 pcs), whereas the ATSAM3S1CA-CU is obsolete with limited remaining stock (994 pcs).

For new designs or production continuity, the ATSAM3S1CB-CU is the appropriate selection. Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can ATSAM3S1CB-CU directly replace ATSAM3S1CA-CU in existing designs?

A: Yes. All electrical parameters, pin assignments, memory configurations, and operating characteristics are identical. No design modifications are required for direct substitution.

Q: Are there differences in package handling or storage requirements?

A: Both parts share identical MSL ratings (3, 168 Hours) and mounting specifications (100-TFBGA 9x9 surface mount). Storage and handling procedures remain unchanged.

Q: What is the primary reason for substitution?

A: The ATSAM3S1CA-CU is classified as obsolete. The ATSAM3S1CB-CU is the active equivalent part maintained in current production by Microchip Technology.

Q: Are compliance certifications identical between the two parts?

A: Yes. Both parts are ROHS3 compliant and carry identical REACH and ECCN classifications.

Q: Is firmware or software modification necessary when switching to ATSAM3S1CB-CU?

A: No. Identical core processor architecture, memory configuration, and peripheral specifications ensure full software compatibility without modification.