AT91SAM7X256B-AU Equivalent & Substitute Parts

Part Overview

The AT91SAM7X256B-AU is an ARM7® SAM7X series microcontroller IC featuring 16/32-bit architecture, 55MHz operation, and 256KB FLASH memory in a 100-LQFP package. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support, design updates, and procurement continuity. The AT91SAM7X256C-AU provides a direct functional equivalent with active product status.

Substiute Parts

AT91SAM7X256B-AU

Microchip TechnologyIn Stock: 18050AT91SAM7X256B-AU Datasheet

Current PartRFQ

AT91SAM7X256C-AU

Microchip TechnologyIn Stock: 4836AT91SAM7X256C-AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT91SAM7X256C-AU qualifies as a direct substitute for the AT91SAM7X256B-AU based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

Core processor architecture (ARM7®), core size (16/32-bit), clock speed (55MHz), program memory capacity (256KB FLASH), RAM capacity (64K x 8), I/O count (62 pins), supply voltage range (1.65V ~ 1.95V), package type (100-LQFP 14x14), and operating temperature range (-40°C ~ 85°C) must remain unchanged. Both parts share the same base product number (AT91SAM7X256) and maintain identical peripheral sets including CANbus, Ethernet, I2C, SPI, SSC, UART/USART, and USB connectivity.

Parameter Comparison

Engineering Selection Recommendations

The AT91SAM7X256C-AU is the appropriate selection for new designs and ongoing production requiring AT91SAM7X256 functionality. This part maintains active product status with Microchip Technology, ensuring continued availability and support. Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The AT91SAM7X256B-AU, classified as obsolete, should be replaced with the AT91SAM7X256C-AU in procurement and design documentation. Packaging differences (tray for C-AU variant versus standard for B-AU) do not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can AT91SAM7X256C-AU directly replace AT91SAM7X256B-AU in existing designs?

A: Yes. Both parts share identical electrical specifications, pin configurations, memory architecture, and peripheral sets. No design modifications are required for substitution.

Q: Are there differences in package handling or storage?

A: The AT91SAM7X256C-AU is supplied in tray packaging, while the AT91SAM7X256B-AU uses standard packaging. Both maintain Moisture Sensitivity Level 3 (168 hours) and require equivalent handling protocols. Packaging format does not affect component functionality or PCB assembly compatibility.

Q: Why is the B-AU variant obsolete while the C-AU remains active?

A: Product status reflects Microchip Technology's manufacturing and support lifecycle. The C-AU variant continues active production, ensuring long-term availability and supply chain stability for applications requiring this microcontroller architecture.

Q: Are there connectivity or peripheral differences between these parts?

A: No. Both parts provide identical connectivity options (CANbus, Ethernet, I2C, SPI, SSC, UART/USART, USB) and peripheral features (Brown-out Detect/Reset, DMA, POR, PWM, WDT).

Q: What compliance certifications apply to both parts?

A: Both AT91SAM7X256B-AU and AT91SAM7X256C-AU are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and distribution.