ATSAM4SA16CA-AN Equivalent & Substitute Parts

Part Overview

The ATSAM4SA16CA-AN is an ARM Cortex-M4 32-bit microcontroller from Microchip Technology's SAM4S series, featuring 1MB of FLASH memory, 160KB of RAM, and 79 I/O pins in a 100-LQFP package. The device operates at 120MHz with integrated connectivity options including USB, UART/USART, SPI, I2C, and memory card interfaces. This microcontroller is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when electrical specifications, memory configurations, package types, and compliance certifications remain equivalent across the product line.

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
Number of I/O	79
Package Type	100-LQFP (14x14)
Voltage Supply Range	1.62V ~ 3.6V
Data Converters	A/D 16x12b; D/A 2x12b
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the ATSAM4SA16CA-AN is determined by strict equivalence across the following parameters:

Core processor architecture and performance (ARM Cortex-M4, 120MHz)
Memory configuration (1MB FLASH, 160KB RAM)
I/O pin count (79 pins)
Package specification (100-LQFP, 14x14mm)
Voltage supply range (1.62V ~ 3.6V)
Connectivity interfaces (USB, UART/USART, SPI, I2C, IrDA, Memory Card, EBI/EMI, SSC)
Peripheral features (Brown-out Detect/Reset, DMA, POR, PWM, WDT)
Data converter specifications (A/D 16x12b, D/A 2x12b)
Compliance certifications (ROHS3, REACH Unaffected)

The ATSAM4SA16CA-AU qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary difference is packaging format (Tray vs. standard packaging) and operating temperature range variance.

Parameter Comparison

Parameter	ATSAM4SA16CA-AN	ATSAM4SA16CA-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
Number of I/O	79	79
Package Type	100-LQFP (14x14)	100-LQFP (14x14)
Voltage Supply Range	1.62V ~ 3.6V	1.62V ~ 3.6V
Data Converters	A/D 16x12b; D/A 2x12b	A/D 16x12b; D/A 2x12b
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
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 85°C (TA)
Packaging Format	Standard	Tray
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Both the ATSAM4SA16CA-AN and ATSAM4SA16CA-AU are Active product status devices from Microchip Technology with identical electrical and functional specifications. Selection between these parts is determined by application-specific requirements:

The ATSAM4SA16CA-AN supports an extended operating temperature range of -40°C to 105°C, making it suitable for industrial and high-temperature applications. The ATSAM4SA16CA-AU operates within -40°C to 85°C, appropriate for commercial and standard industrial environments. Both devices maintain ROHS3 compliance and REACH Unaffected status. Packaging format differs (standard vs. Tray), which may influence procurement and assembly workflows but does not affect electrical performance or functional compatibility.

Frequently Asked Questions (FAQ)

Q: Are ATSAM4SA16CA-AN and ATSAM4SA16CA-AU electrically identical?

A: Yes. Both devices feature identical core processor architecture (ARM Cortex-M4), clock speed (120MHz), memory configuration (1MB FLASH, 160KB RAM), I/O count (79 pins), connectivity interfaces, and peripheral features. The primary differences are operating temperature range and packaging format.

Q: What is the significance of the operating temperature difference between these parts?

A: The ATSAM4SA16CA-AN operates to 105°C while the ATSAM4SA16CA-AU operates to 85°C. Applications requiring sustained operation above 85°C must use the ATSAM4SA16CA-AN. For applications within the 85°C limit, either part is suitable.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use the 100-LQFP (14x14mm) package with identical pin assignments, voltage requirements (1.62V ~ 3.6V), and functional specifications. PCB layout and schematic designs require no modification for substitution.

Q: What does the packaging format difference (standard vs. Tray) mean?

A: Packaging format refers to the delivery container and handling method. Standard packaging and Tray packaging contain the same microcontroller die and do not affect electrical performance, functionality, or PCB compatibility. The choice depends on procurement preferences and assembly line requirements.

Q: Are both parts suitable for new designs?

A: Yes. Both ATSAM4SA16CA-AN and ATSAM4SA16CA-AU are classified as Active product status, indicating ongoing manufacturing and support from Microchip Technology. Either part is appropriate for new product development within their respective operating temperature specifications.

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