AT91SAM7SE32-CU Equivalent & Substitute Parts

Part Overview

The AT91SAM7SE32-CU is an ARM7® SAM7SE microcontroller IC featuring 16/32-bit architecture, 55MHz operation, and 32KB FLASH memory in a 144-BGA (13x13) package. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The SAM7SE series provides integrated connectivity options including EBI/EMI, I2C, SPI, SSC, UART/USART, and USB interfaces, along with essential peripherals such as brown-out detection, power-on reset, PWM, and watchdog timer functionality.

Key Parameters

Parameter	Value
Core Processor	ARM7®
Core Size	16/32-Bit
Speed	55MHz
Program Memory Size	32KB (32K x 8)
Program Memory Type	FLASH
RAM Size	8K x 8
Voltage Supply (Vcc/Vdd)	1.65V ~ 1.95V
Number of I/O	88
Data Converters	A/D 8x10b
Connectivity	EBI/EMI, I2C, SPI, SSC, UART/USART, USB
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	144-LFBGA
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the AT91SAM7SE32-CU is determined by strict equivalence across the following critical parameters:

Core processor architecture (ARM7®)
Core size (16/32-Bit)
Operating frequency (55MHz)
Program memory capacity and type (32KB FLASH)
RAM configuration (8K x 8)
Supply voltage range (1.65V ~ 1.95V)
I/O count (88 pins)
Connectivity interfaces (EBI/EMI, I2C, SPI, SSC, UART/USART, USB)
Peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)
Data converter specifications (A/D 8x10b)
Operating temperature range (-40°C ~ 85°C)
Surface mount configuration
RoHS3 compliance and MSL rating

The AT91SAM7SE32B-CU qualifies as a direct substitute based on identical electrical specifications and functional equivalence across all critical parameters. The primary distinction is product status transition from obsolete to active, with packaging variation from 144-BGA (13x13) to 144-LFBGA (10x10).

Parameter Comparison

Parameter	AT91SAM7SE32-CU	AT91SAM7SE32B-CU	Match
Manufacturer	Microchip Technology	Microchip Technology	✓
Series	SAM7SE	SAM7SE	✓
Core Processor	ARM7®	ARM7®	✓
Core Size	16/32-Bit	16/32-Bit	✓
Speed	55MHz	55MHz	✓
Program Memory Size	32KB (32K x 8)	32KB (32K x 8)	✓
Program Memory Type	FLASH	FLASH	✓
RAM Size	8K x 8	8K x 8	✓
Voltage Supply (Vcc/Vdd)	1.65V ~ 1.95V	1.65V ~ 1.95V	✓
Number of I/O	88	88	✓
Data Converters	A/D 8x10b	A/D 8x10b	✓
Connectivity	EBI/EMI, I2C, SPI, SSC, UART/USART, USB	EBI/EMI, I2C, SPI, SSC, UART/USART, USB	✓
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Package / Case	144-LFBGA	144-LFBGA	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
MSL Rating	3 (168 Hours)	3 (168 Hours)	✓
Product Status	Obsolete	Active	Different

Engineering Selection Recommendations

The AT91SAM7SE32B-CU is the direct substitute for AT91SAM7SE32-CU applications. Selection is based on the following engineering criteria:

Electrical Equivalence: All electrical parameters, memory configurations, and interface specifications are identical between the two parts. Functional compatibility is complete.

Product Status: The AT91SAM7SE32B-CU maintains active product status with Microchip Technology, ensuring ongoing availability and support. The original AT91SAM7SE32-CU is classified as obsolete, necessitating transition to the substitute for new designs and production continuity.

Compliance Certifications: Both parts maintain ROHS3 compliance and identical MSL ratings (3, 168 Hours), ensuring equivalent environmental and handling requirements.

Packaging Consideration: Both parts utilize 144-LFBGA surface mount packages. PCB layout compatibility is maintained, though physical package dimensions may vary slightly between the 13x13 and 10x10 BGA variants. Verify footprint compatibility with your specific PCB design before implementation.

Frequently Asked Questions (FAQ)

Q: Can AT91SAM7SE32B-CU directly replace AT91SAM7SE32-CU in existing designs?

A: Yes. All electrical specifications, memory capacity, I/O configuration, connectivity interfaces, and peripheral features are identical. The substitute part is functionally equivalent and requires no firmware or software modifications.

Q: What is the primary reason for substitution?

A: The AT91SAM7SE32-CU is classified as obsolete. The AT91SAM7SE32B-CU is the active equivalent from Microchip Technology, ensuring component availability and manufacturer support for ongoing production.

Q: Are there packaging differences between these parts?

A: Both parts use 144-LFBGA surface mount packages. The original part specifies 144-BGA (13x13) while the substitute specifies 144-LFBGA (10x10). Verify that your PCB footprint accommodates the specific BGA ball grid array dimensions before design implementation.

Q: Do compliance and environmental ratings differ?

A: No. Both parts are ROHS3 compliant with identical MSL ratings of 3 (168 Hours). Environmental handling and storage requirements are equivalent.

Q: What are the critical parameters for substitution compatibility?

A: Substitution is valid based on matching ARM7® core architecture, 16/32-bit processing, 55MHz operation, 32KB FLASH memory, 8KB RAM, 1.65V-1.95V supply voltage, 88 I/O pins, and identical connectivity/peripheral feature sets. Any deviation from these parameters requires re-evaluation.

Q: Is firmware compatibility guaranteed?

A: Yes. Identical core processor architecture, memory organization, and peripheral configurations ensure complete firmware compatibility without modification.

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