ATXMEGA16D4-AN Equivalent & Substitute Parts

Part Overview

The ATXMEGA16D4-AN is an AVR XMEGA D4 microcontroller IC manufactured by Microchip Technology, featuring 8/16-bit architecture with 32MHz operation and 16KB FLASH memory in a 44-TQFP surface mount package. This part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. The ATXMEGA16D4-AU serves as the primary substitute, offering identical electrical and functional specifications with active product status.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8/16-Bit
Speed	32MHz
Program Memory Size	16KB (8K x 16)
Program Memory Type	FLASH
EEPROM Size	1K x 8
RAM Size	2K x 8
Number of I/O	34
Connectivity	I2C, IrDA, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 12x12b
Voltage - Supply (Vcc/Vdd)	1.6V ~ 3.6V
Oscillator Type	Internal
Mounting Type	Surface Mount
Package / Case	44-TQFP (10x10)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATXMEGA16D4-AN is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR processor family and XMEGA D4 series designation
Memory Configuration: 16KB FLASH, 1KB EEPROM, 2KB RAM
Processing Speed: 32MHz operation
I/O Count: 34 I/O pins
Connectivity Interfaces: I2C, IrDA, SPI, UART/USART support
Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT
Package Format: 44-TQFP (10x10) surface mount
Voltage Range: 1.6V ~ 3.6V supply compatibility
Compliance Standards: ROHS3 and REACH compliance

The ATXMEGA16D4-AU maintains full electrical and functional equivalence to the ATXMEGA16D4-AN across all specified parameters, with the primary distinction being product status transition from obsolete to active.

Parameter Comparison

Parameter	ATXMEGA16D4-AN (Main)	ATXMEGA16D4-AU (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Series	AVR® XMEGA® D4	AVR® XMEGA® D4
Core Processor	AVR	AVR
Core Size	8/16-Bit	8/16-Bit
Speed	32MHz	32MHz
Program Memory Size	16KB (8K x 16)	16KB (8K x 16)
EEPROM Size	1K x 8	1K x 8
RAM Size	2K x 8	2K x 8
Number of I/O	34	34
Connectivity	I2C, IrDA, SPI, UART/USART	I2C, IrDA, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 12x12b	A/D 12x12b
Voltage - Supply (Vcc/Vdd)	1.6V ~ 3.6V	1.6V ~ 3.6V
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	44-TQFP (10x10)	44-TQFP (10x10)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The ATXMEGA16D4-AU is the direct equivalent substitute for the ATXMEGA16D4-AN. Both parts maintain identical electrical specifications, memory configuration, I/O architecture, and peripheral functionality. The transition from obsolete to active product status makes the ATXMEGA16D4-AU the appropriate selection for new designs and ongoing production requirements.

Both parts satisfy ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications. The identical MSL rating of 3 (168 Hours) maintains consistent handling and storage requirements across substitution.

The operating temperature range differs between the two parts: the ATXMEGA16D4-AN supports -40°C to 105°C, while the ATXMEGA16D4-AU supports -40°C to 85°C. Applications requiring operation above 85°C must retain the original ATXMEGA16D4-AN specification or identify alternative solutions outside this product family.

Frequently Asked Questions (FAQ)

Q: Are the ATXMEGA16D4-AN and ATXMEGA16D4-AU pin-compatible?

A: Yes. Both parts use the 44-TQFP (10x10) package with identical pin assignments, I/O configuration, and functional pinout. Direct PCB substitution is supported without layout modification.

Q: What is the difference between the ATXMEGA16D4-AN and ATXMEGA16D4-AU?

A: The parts are electrically and functionally equivalent. The primary differences are product status (obsolete versus active) and operating temperature range. The ATXMEGA16D4-AN operates to 105°C, while the ATXMEGA16D4-AU operates to 85°C.

Q: Can I use the ATXMEGA16D4-AU in applications originally designed for the ATXMEGA16D4-AN?

A: Yes, provided the application operating temperature does not exceed 85°C. If the design requires operation above 85°C, the ATXMEGA16D4-AN specification must be maintained or alternative solutions evaluated.

Q: Are both parts available in the same packaging options?

A: The ATXMEGA16D4-AN is supplied in standard packaging, while the ATXMEGA16D4-AU is supplied in Tray packaging. Both use the 44-TQFP (10x10) case format. Packaging differences do not affect electrical or functional compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the ATXMEGA16D4-AN and ATXMEGA16D4-AU are ROHS3 compliant and REACH unaffected, with identical MSL ratings of 3 (168 Hours).

Q: What memory specifications are identical between these parts?

A: Both parts feature 16KB FLASH program memory (8K x 16), 1KB x 8 EEPROM, and 2KB x 8 RAM. Memory architecture, addressing, and access characteristics are identical.

Q: Are the connectivity interfaces identical?

A: Yes. Both parts support I2C, IrDA, SPI, and UART/USART interfaces with identical peripheral configurations including Brown-out Detect/Reset, POR, PWM, and WDT functionality.

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