AT90PWM2-16SQ Equivalent & Substitute Parts

Part Overview

The AT90PWM2-16SQ is an AVR 8-bit microcontroller from Microchip Technology's 90PWM Lighting series, designed for embedded applications requiring PWM control capabilities. This device features 8KB of FLASH program memory, 512 bytes each of EEPROM and RAM, and operates at 16MHz with a supply voltage range of 2.7V to 5.5V. The part is currently in active production status with 1900 units available in stock. Alternative models may be required due to inventory constraints, specific packaging preferences, or moisture sensitivity level requirements for particular application environments.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Core Processor	AVR
Core Size	8-Bit
Speed	16MHz
Program Memory Size	8KB (8K x 8)
Program Memory Type	FLASH
EEPROM Size	512 x 8
RAM Size	512 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V
Number of I/O	19
Data Converters	A/D 8x10b, D/A 1x10b
Connectivity	SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount
Package / Case	24-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The AT90PWM2B-16SU qualifies as a parametric equivalent to the AT90PWM2-16SQ based on the following critical parameters:

Core Architecture: Both devices use the AVR core processor with identical 8-bit configuration
Memory Configuration: Identical program memory (8KB FLASH), EEPROM (512 x 8), and RAM (512 x 8)
Operating Frequency: Both operate at 16MHz
Voltage Supply Range: Both support 2.7V ~ 5.5V operation
I/O Count: Both provide 19 I/O pins
Data Converters: Identical A/D (8x10b) and D/A (1x10b) configurations
Connectivity & Peripherals: Both feature SPI, UART/USART, Brown-out Detect/Reset, POR, PWM, and WDT
Operating Temperature: Both rated for -40°C ~ 105°C
Package: Both use 24-SOIC surface mount packaging with identical physical dimensions
Compliance: Both are ROHS3 compliant and REACH unaffected

The primary differences are packaging format (Tube for both) and moisture sensitivity level classification.

Parameter Comparison

Parameter	AT90PWM2-16SQ	AT90PWM2B-16SU
Manufacturer	Microchip Technology	Microchip Technology
Series	AVR® 90PWM Lighting	AVR® 90PWM Lighting
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	16MHz	16MHz
Program Memory Size	8KB (8K x 8)	8KB (8K x 8)
Program Memory Type	FLASH	FLASH
EEPROM Size	512 x 8	512 x 8
RAM Size	512 x 8	512 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V
Number of I/O	19	19
Data Converters	A/D 8x10b, D/A 1x10b	A/D 8x10b, D/A 1x10b
Connectivity	SPI, UART/USART	SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	24-SOIC (0.295", 7.50mm Width)	24-SOIC (0.295", 7.50mm Width)
Supplier Device Package	24-SOIC	24-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Inventory Status	1900 Pcs New Original In Stock	1446 Pcs New Original In Stock
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

Both the AT90PWM2-16SQ and AT90PWM2B-16SU are active production devices from Microchip Technology with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on the following criteria:

AT90PWM2-16SQ is the primary choice when moisture sensitivity is a critical constraint. With MSL 1 (Unlimited), this device has no moisture absorption limitations and is suitable for applications with extended storage periods or high-humidity environments without special handling requirements.

AT90PWM2B-16SU is functionally equivalent and suitable for applications where moisture sensitivity level 3 (168 hours) is acceptable. This variant provides an alternative when AT90PWM2-16SQ availability is limited, provided the application environment and storage conditions align with MSL 3 specifications.

Both devices are electrically and mechanically interchangeable for applications requiring AVR 8-bit microcontrollers with 16MHz operation, 8KB FLASH memory, PWM capabilities, and 24-SOIC packaging.

Frequently Asked Questions (FAQ)

Q: Are AT90PWM2-16SQ and AT90PWM2B-16SU pin-compatible? A: Yes. Both devices use identical 24-SOIC packaging with the same physical dimensions (0.295", 7.50mm width) and pin configuration, ensuring direct PCB compatibility.

Q: What is the significance of the moisture sensitivity level difference? A: MSL 1 (AT90PWM2-16SQ) indicates unlimited moisture absorption tolerance, while MSL 3 (AT90PWM2B-16SU) specifies a 168-hour floor life after moisture exposure. MSL 1 is preferred for applications with extended storage or high-humidity conditions without special desiccant packaging.

Q: Can these parts be used interchangeably in production? A: Yes, provided the application environment and storage conditions are compatible with the moisture sensitivity level of the selected device. Both parts meet identical electrical and functional specifications.

Q: Are both devices suitable for industrial temperature applications? A: Yes. Both the AT90PWM2-16SQ and AT90PWM2B-16SU are rated for -40°C to 105°C operating temperature, supporting industrial and extended temperature range applications.

Q: What connectivity options are available on both devices? A: Both devices feature SPI and UART/USART connectivity, enabling serial communication and peripheral interfacing in embedded applications.

Q: Are there any compliance differences between these parts? A: No. Both devices are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.

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