ATSAM3S1CA-AU Equivalent & Substitute Parts

Part Overview

The ATSAM3S1CA-AU is an ARM Cortex-M3 SAM3S microcontroller IC manufactured by Microchip Technology, featuring 32-bit single-core architecture, 64MHz clock speed, and 64KB FLASH memory in a 100-LQFP package. This part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Core Processor	ARM Cortex-M3
Core Size	32-Bit Single-Core
Speed	64MHz
Program Memory Size	64KB (64K x 8) FLASH
RAM Size	16K x 8
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.6V
Number of I/O	79
Package / Case	100-LQFP (14x14)
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the ATSAM3S1CA-AU is determined by strict equivalence across the following critical parameters:

Core Architecture: ARM Cortex-M3 processor
Memory Configuration: 64KB FLASH, 16KB RAM
Clock Frequency: 64MHz
I/O Count: 79 pins
Package Format: 100-LQFP (14x14)
Voltage Range: 1.62V ~ 3.6V
Connectivity Interfaces: EBI/EMI, I2C, Memory Card, SPI, SSC, UART/USART, USB
Peripheral Set: Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
Data Converters: A/D 15x10/12b, D/A 2x12b

The ATSAM3S1CB-AU meets all substitution criteria as a direct equivalent within the SAM3S microcontroller series.

Parameter Comparison

Parameter	ATSAM3S1CA-AU	ATSAM3S1CB-AU	Match
Manufacturer	Microchip Technology	Atmel	Same Series
Core Processor	ARM Cortex-M3	ARM Cortex-M3	✓
Core Size	32-Bit Single-Core	32-Bit Single-Core	✓
Speed	64MHz	64MHz	✓
Program Memory Size	64KB (64K x 8) FLASH	64KB (64K x 8) FLASH	✓
RAM Size	16K x 8	16K x 8	✓
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.6V	1.62V ~ 3.6V	✓
Number of I/O	79	79	✓
Package / Case	100-LQFP (14x14)	100-LQFP (14x14)	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Connectivity	EBI/EMI, I2C, Memory Card, SPI, SSC, UART/USART, USB	EBI/EMI, I2C, Memory Card, SPI, SSC, UART/USART, USB	✓
Peripherals	Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT	Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT	✓
Data Converters	A/D 15x10/12b; D/A 2x12b	A/D 15x10/12b; D/A 2x12b	✓
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The ATSAM3S1CB-AU is a direct functional equivalent to the ATSAM3S1CA-AU. Both parts share identical electrical specifications, memory configuration, I/O architecture, and package format. The primary distinction is product lifecycle status: the ATSAM3S1CA-AU is obsolete, while the ATSAM3S1CB-AU maintains active production status. For new designs or production continuity, the ATSAM3S1CB-AU is the appropriate selection. Both parts comply with ROHS3 and carry identical ECCN and HTSUS classifications, ensuring regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can the ATSAM3S1CB-AU be used as a direct replacement for the ATSAM3S1CA-AU?

A: Yes. The ATSAM3S1CB-AU is a direct substitute. All electrical parameters, memory specifications, I/O configuration, and package dimensions are identical. No circuit modifications are required.

Q: Are there any differences in pin configuration between these parts?

A: No. Both parts use the 100-LQFP (14x14) package with 79 I/O pins in identical pin assignments.

Q: What is the primary reason to substitute the ATSAM3S1CA-AU?

A: The ATSAM3S1CA-AU is obsolete. The ATSAM3S1CB-AU maintains active production status and ensures long-term availability for design support and manufacturing continuity.

Q: Are the voltage supply ranges identical?

A: Yes. Both parts operate within the 1.62V ~ 3.6V supply voltage range with identical electrical characteristics.

Q: Do both parts support the same connectivity interfaces?

A: Yes. Both parts include EBI/EMI, I2C, Memory Card, SPI, SSC, UART/USART, and USB connectivity with identical peripheral support.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message