AT91SAM7S64-MU Equivalent & Substitute Parts

Part Overview

The AT91SAM7S64-MU is an ARM7® SAM7S series microcontroller IC featuring 16/32-bit architecture, 55MHz operation, and 64KB FLASH memory in a 64-QFN (9x9) surface mount package. This part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

AT91SAM7S64-MU

Microchip TechnologyIn Stock: 2395AT91SAM7S64-MU Datasheet

Current PartRFQ

AT91SAM7S64C-MU

Microchip TechnologyIn Stock: 3656AT91SAM7S64C-MU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT91SAM7S64-MU is determined by strict equivalence across the following critical parameters:

Core Compatibility Parameters:

• ARM7® processor architecture
• 16/32-bit core size
• 55MHz clock speed
• 64KB FLASH memory capacity
• 16KB RAM capacity
• 64-QFN (9x9) package footprint
• 1.65V ~ 1.95V supply voltage range
• 32 I/O pins
• Internal oscillator configuration

Peripheral Compatibility:

• I2C, SPI, SSC, UART/USART connectivity support
• Brown-out Detect/Reset, POR, PWM, WDT functionality
• A/D 8x10-bit data converter

The AT91SAM7S64C-MU qualifies as a direct substitute based on identical electrical specifications, matching package geometry, and equivalent functional integration. The substitute part maintains all core processor characteristics, memory configuration, and peripheral interfaces required for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The AT91SAM7S64C-MU is the qualified substitute for the obsolete AT91SAM7S64-MU. Selection is based on the following engineering criteria:

Product Status: The AT91SAM7S64C-MU maintains active product status with Microchip Technology, ensuring continued availability and technical support. The original AT91SAM7S64-MU is classified as obsolete, necessitating transition to the substitute part for new designs and ongoing procurement.

Compliance & Certifications: Both parts maintain ROHS3 compliance and identical MSL ratings (3, 168 Hours), ensuring equivalent environmental and handling requirements. REACH status is unaffected for both variants.

Functional Equivalence: Electrical specifications, memory configuration, core processor architecture, and package geometry are identical between the main part and substitute. The AT91SAM7S64C-MU includes additional USB connectivity and DMA peripheral support, representing functional enhancement without compromising backward compatibility for applications utilizing the base feature set.

Programmability Verification: The substitute part (AT91SAM7S64C-MU) is verified as programmable, supporting direct firmware compatibility with existing software developed for the AT91SAM7S64-MU platform.

Frequently Asked Questions (FAQ)

Q: Can the AT91SAM7S64C-MU directly replace the AT91SAM7S64-MU in existing designs?

A: Yes. The AT91SAM7S64C-MU is electrically and mechanically equivalent to the AT91SAM7S64-MU. Identical core processor, memory capacity, I/O count, voltage specifications, and 64-QFN package footprint enable direct substitution. The substitute part includes additional USB connectivity and DMA functionality that do not interfere with existing application firmware.

Q: What is the primary reason for substitution?

A: The AT91SAM7S64-MU is classified as obsolete. The AT91SAM7S64C-MU is the active equivalent part from Microchip Technology, ensuring long-term availability and continued technical support.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 64-VFQFN Exposed Pad package with 9x9mm footprint. PCB layout and component placement require no modification.

Q: Do supply voltage requirements differ?

A: No. Both parts operate within the identical 1.65V ~ 1.95V supply voltage range, requiring no power supply circuit modifications.

Q: What additional features does the substitute part provide?

A: The AT91SAM7S64C-MU includes USB connectivity and DMA peripheral support beyond the base AT91SAM7S64-MU feature set. These enhancements are optional and do not affect compatibility with existing firmware.

Q: Are there differences in operating temperature range?

A: No. Both parts maintain identical -40°C ~ 85°C operating temperature specifications.

Q: Is firmware recompilation required?

A: No. Existing firmware compiled for the AT91SAM7S64-MU is compatible with the AT91SAM7S64C-MU without modification, provided the application does not utilize the additional USB or DMA features.