ATSAMA5D21B-CU Equivalent & Substitute Parts

Part Overview

The ATSAMA5D21B-CU is an ARM Cortex-A5 microprocessor from Microchip Technology's SAMA5D2 series, operating at 500MHz with 32-bit architecture in a 196-TFBGA package. This embedded processor integrates multimedia acceleration, multiple memory controllers, graphics acceleration, and comprehensive security features including ARM TrustZone, cryptography, and secure boot capabilities.

The ATSAMA5D21B-CU is classified as obsolete. Identifying equivalent substitute parts is necessary to support legacy system maintenance, design updates, and procurement continuity when original inventory becomes unavailable.

Substiute Parts

ATSAMA5D21B-CU

Microchip TechnologyIn Stock: 939ATSAMA5D21B-CU Datasheet

Current PartRFQ

ATSAMA5D21C-CU

Microchip TechnologyIn Stock: 2175ATSAMA5D21C-CU Datasheet

DirectRFQ

ATSAMA5D21A-CU

Microchip TechnologyIn Stock: 772ATSAMA5D21A-CU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATSAMA5D21B-CU is determined by strict equivalence across the following critical parameters:

• Processor Architecture: ARM Cortex-A5 core with identical instruction set
• Clock Speed: 500MHz operation
• Package Format: 196-TFBGA (11x11) ball grid array
• I/O Voltage: 3.3V supply
• Temperature Range: -40°C to 85°C operating specification
• Memory Controller Support: LPDDR1, LPDDR2, LPDDR3, DDR2, DDR3, DDR3L, QSPI compatibility
• Interface Set: I2C, SMC, SPI, UART, USART, QSPI
• Security Features: ARM TrustZone, Boot Security, Cryptography, RTIC, Secure Fusebox, Secure JTAG, Secure Memory, Secure RTC
• Compliance: ROHS3 and REACH requirements

The identified substitutes maintain full electrical and functional equivalence within the SAMA5D2 product line, differing only in product lifecycle status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

Both ATSAMA5D21C-CU and ATSAMA5D21A-CU are direct functional equivalents to the ATSAMA5D21B-CU, with identical electrical specifications, package format, and feature sets. The primary distinction is product lifecycle status.

ATSAMA5D21C-CU is the direct manufacturer-recommended substitute. It maintains active product status with Microchip Technology and is available in higher inventory quantities (2,136 units). This part carries identical ROHS3 compliance and REACH unaffected status. The packaging configuration is specified as Tray, which is standard for active production parts.

ATSAMA5D21A-CU is an alternative substitute also in active status with 736 units available. It provides equivalent functionality and compliance certifications. This part is designated as the manufacturer-recommended option and represents a secondary substitution path.

Both substitutes are suitable for direct replacement in applications currently using the ATSAMA5D21B-CU, with no design modifications required. Selection between the two should be based on procurement availability and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Are ATSAMA5D21C-CU and ATSAMA5D21A-CU fully compatible with designs using ATSAMA5D21B-CU?

A: Yes. Both substitutes maintain identical electrical specifications, processor architecture, clock speed, package format (196-TFBGA 11x11), I/O voltage (3.3V), operating temperature range (-40°C to 85°C), memory controller support, interface sets, and security features. No circuit modifications are required.

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

A: The ATSAMA5D21B-CU, ATSAMA5D21C-CU, and ATSAMA5D21A-CU differ only in product lifecycle status and packaging configuration. The ATSAMA5D21B-CU is obsolete, while both ATSAMA5D21C-CU and ATSAMA5D21A-CU are active products. All three are functionally and electrically equivalent within the SAMA5D2 series.

Q: Can I use ATSAMA5D21C-CU as a drop-in replacement for ATSAMA5D21B-CU?

A: Yes. The ATSAMA5D21C-CU is a direct drop-in replacement. It uses the same 196-TFBGA (11x11) package, operates at 500MHz, supports identical memory controllers and interfaces, and maintains all security features. No PCB redesign or firmware modifications are necessary.

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

A: No. All three parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN and HTSUS classifications. Moisture sensitivity level (MSL 3, 168 hours) is consistent across all variants.

Q: Which substitute should I select for new designs?

A: For new designs, either ATSAMA5D21C-CU or ATSAMA5D21A-CU is appropriate, as both are active products. ATSAMA5D21C-CU is recommended based on higher inventory availability and active production status with Microchip Technology.

Q: What is the operating temperature range for these parts?

A: All three parts operate across the identical temperature range of -40°C to 85°C (TA), ensuring consistent thermal performance across substitution scenarios.