ATSAM4SD16CA-AN Equivalent & Substitute Parts

Part Overview

The ATSAM4SD16CA-AN is an ARM Cortex-M4 based 32-bit microcontroller from Microchip Technology's SAM4S series. This device integrates 1MB of FLASH program memory, 160KB of RAM, and operates at 120MHz with a supply voltage range of 1.62V to 3.6V. The part is housed in a 64-LQFP (10x10mm) package and is currently in active production status. Substitute parts are identified when design requirements necessitate alternative packaging configurations, extended temperature ranges, or different pin counts while maintaining core functional compatibility.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Series	SAM4S
Core Processor	ARM Cortex-M4
Core Size	32-Bit Single-Core
Speed	120MHz
Program Memory Size	1MB (1M x 8)
RAM Size	160K x 8
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.6V
Data Converters	A/D 16x12b, D/A 2x12b
Number of I/O	79
Package Type	64-LQFP (10x10mm)
Operating Temperature	-40°C ~ 105°C
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the ATSAM4SD16CA-AN is determined by the following core parameters:

Processor Architecture: ARM Cortex-M4 core
Memory Configuration: 1MB FLASH, 160KB RAM
Operating Frequency: 120MHz
Supply Voltage Range: 1.62V ~ 3.6V
Peripheral Set: EBI/EMI, I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB connectivity
Base Product Number: ATSAM4SD

The ATSAM4SD16CA-AU qualifies as a substitute because it maintains identical core processor architecture, memory capacity, operating frequency, supply voltage specifications, and peripheral connectivity. The primary difference is the package configuration (100-LQFP versus 64-LQFP) and the maximum operating temperature specification.

Parameter Comparison

Parameter	ATSAM4SD16CA-AN	ATSAM4SD16CA-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 Size	1MB (1M x 8)	1MB (1M x 8)
RAM Size	160K x 8	160K x 8
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.6V	1.62V ~ 3.6V
Data Converters	A/D 16x12b, D/A 2x12b	A/D 16x12b, D/A 2x12b
Number of I/O	79	79
Connectivity	EBI/EMI, I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB	EBI/EMI, 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
Package Type	64-LQFP (10x10mm)	100-LQFP (14x14mm)
Operating Temperature	-40°C ~ 105°C	-40°C ~ 85°C
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Both the ATSAM4SD16CA-AN and ATSAM4SD16CA-AU are active production devices with ROHS3 compliance and identical MSL ratings. Selection between these parts depends on application-specific requirements:

The ATSAM4SD16CA-AN in 64-LQFP packaging is suitable for space-constrained designs requiring a smaller footprint (10x10mm). This variant supports the extended operating temperature range of -40°C to 105°C, making it appropriate for industrial and automotive applications with elevated temperature requirements.

The ATSAM4SD16CA-AU in 100-LQFP packaging provides additional I/O accessibility through the larger package format (14x14mm). The maximum operating temperature is specified at 85°C, which is suitable for commercial and consumer applications operating within standard temperature ranges.

Both parts maintain identical core functionality, memory configuration, and peripheral integration, ensuring software and firmware compatibility across substitution.

Frequently Asked Questions (FAQ)

Q: Can the ATSAM4SD16CA-AU replace the ATSAM4SD16CA-AN in all applications?

A: Functional replacement is possible for applications operating within the -40°C to 85°C temperature range. Applications requiring operation above 85°C must use the ATSAM4SD16CA-AN to maintain compliance with the extended temperature specification of -40°C to 105°C.

Q: What is the primary difference between these two parts?

A: The ATSAM4SD16CA-AN uses a 64-LQFP (10x10mm) package with extended temperature rating to 105°C. The ATSAM4SD16CA-AU uses a 100-LQFP (14x14mm) package with maximum temperature rating of 85°C. All core processor, memory, and peripheral specifications are identical.

Q: Are PCB layout changes required when substituting between these parts?

A: Yes. The different package formats (64-LQFP versus 100-LQFP) require distinct PCB footprints and pin assignments. PCB redesign is necessary for physical and electrical compatibility.

Q: Do both parts have the same supply voltage requirements?

A: Yes. Both the ATSAM4SD16CA-AN and ATSAM4SD16CA-AU operate with identical supply voltage specifications of 1.62V to 3.6V.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant with identical MSL ratings of 3 (168 Hours). No compliance differences exist between the two variants.

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