ATSAM4SD16BA-AN Equivalent & Substitute Parts

Part Overview

The ATSAM4SD16BA-AN is an ARM Cortex-M4 SAM4S microcontroller manufactured by Microchip Technology. This 32-bit single-core embedded processor operates at 120MHz with 1MB of FLASH program memory and 160KB of RAM. The device integrates multiple communication interfaces including I2C, SPI, UART/USART, and USB, along with analog data conversion capabilities. The part is currently in active production status and is ROHS3 compliant. Identifying equivalent substitute parts is necessary when the primary part number becomes unavailable or when alternative packaging or inventory conditions require component alternatives.

Key Parameters

Parameter	Value
Core Processor	ARM Cortex-M4
Core Size	32-Bit Single-Core
Speed	120MHz
Program Memory Size	1MB (1M x 8) FLASH
RAM Size	160K x 8
Voltage Supply Range	1.62V ~ 3.6V
Package Type	64-LQFP (10x10)
Mounting Type	Surface Mount
Series	SAM4S
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ATSAM4SD16BA-AN is determined by strict equivalence across the following critical parameters:

Core processor architecture and instruction set (ARM Cortex-M4)
Memory configuration (1MB FLASH, 160KB RAM)
Operating frequency (120MHz)
Package form factor (64-LQFP 10x10)
Supply voltage range (1.62V ~ 3.6V)
Peripheral interface set (I2C, SPI, UART/USART, USB, SSC, IrDA, Memory Card)
Data converter specifications (A/D 11x12b, D/A 2x12b)
Compliance certifications (ROHS3, REACH Unaffected)

The ATSAM4SD16BA-AU qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary difference is the packaging format (Tray versus standard) and operating temperature range specification.

Parameter Comparison

Parameter	ATSAM4SD16BA-AN	ATSAM4SD16BA-AU
Manufacturer	Microchip Technology	Microchip Technology
Series	SAM4S	SAM4S
Core Processor	ARM Cortex-M4	ARM Cortex-M4
Core Size	32-Bit Single-Core	32-Bit Single-Core
Speed	120MHz	120MHz
Program Memory	1MB (1M x 8) FLASH	1MB (1M x 8) FLASH
RAM Size	160K x 8	160K x 8
Voltage Supply	1.62V ~ 3.6V	1.62V ~ 3.6V
Data Converters	A/D 11x12b; D/A 2x12b	A/D 11x12b; D/A 2x12b
Connectivity	I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB	I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB
Peripherals	Brown-out Detect/Reset, DMA, POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O	47	47
Package Type	64-LQFP (10x10)	64-LQFP (10x10)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Active

Engineering Selection Recommendations

Both the ATSAM4SD16BA-AN and ATSAM4SD16BA-AU are active production parts from Microchip Technology with identical electrical and functional specifications. Selection between these parts should be based on the following factors:

The ATSAM4SD16BA-AN supports an extended operating temperature range of -40°C to 105°C, making it suitable for applications requiring higher temperature operation. The ATSAM4SD16BA-AU operates within -40°C to 85°C and is supplied in Tray packaging.

Both parts maintain ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements. The identical peripheral set, memory configuration, and I/O count ensure functional interchangeability in circuit designs. Selection should prioritize the part whose operating temperature specification aligns with the application's thermal requirements and whose packaging format matches procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Are ATSAM4SD16BA-AN and ATSAM4SD16BA-AU pin-compatible?

A: Yes. Both parts use the 64-LQFP (10x10) package with identical pinout and 47 I/O lines. PCB layout and footprint requirements are identical.

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

A: The ATSAM4SD16BA-AN specifies an operating temperature range of -40°C to 105°C, while the ATSAM4SD16BA-AU operates from -40°C to 85°C. The ATSAM4SD16BA-AU is supplied in Tray packaging format.

Q: Can I substitute ATSAM4SD16BA-AU for ATSAM4SD16BA-AN in a design rated for 105°C operation?

A: No. The ATSAM4SD16BA-AU maximum operating temperature is 85°C. Use only the ATSAM4SD16BA-AN for applications requiring operation above 85°C.

Q: Are the memory specifications identical between these parts?

A: Yes. Both parts contain 1MB of FLASH program memory and 160KB of RAM with identical access characteristics and performance.

Q: Do both parts support the same communication interfaces?

A: Yes. Both parts integrate I2C, SPI, UART/USART, USB, SSC, IrDA, and Memory Card interfaces with identical specifications.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH Unaffected, and carry identical MSL ratings of 3 (168 Hours).

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