ATXMEGA16D4-MHK Equivalent & Substitute Parts

Part Overview

The ATXMEGA16D4-MHK is an AVR XMEGA D4 series microcontroller manufactured by Microchip Technology. This 8/16-bit embedded processor operates at 32MHz with 16KB FLASH program memory and is housed in a 44-VQFN surface mount package. The device is classified as Active product status and is RoHS3 compliant. Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when inventory constraints necessitate sourcing from alternative stock channels.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Series	AVR® XMEGA® D4
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
Voltage Supply (Vcc/Vdd)	1.6V ~ 3.6V
Number of I/O	34
Data Converters	A/D 12x12b
Connectivity	I2C, IrDA, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	44-VQFN (7x7) Exposed Pad
RoHS Status	RoHS3 Compliant
MSL Rating	3 (168 Hours)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the ATXMEGA16D4-MHK is permissible with the ATXMEGA16D4-MH based on strict parametric equivalence. Both parts share identical electrical specifications across all critical parameters: core processor architecture (AVR), core size (8/16-Bit), operating frequency (32MHz), memory configuration (16KB FLASH, 1K x 8 EEPROM, 2K x 8 RAM), I/O count (34 pins), connectivity interfaces (I2C, IrDA, SPI, UART/USART), peripheral features, voltage supply range (1.6V ~ 3.6V), data converter specifications (A/D 12x12b), and thermal operating range (-40°C ~ 85°C).

The primary distinction between these parts is packaging format: ATXMEGA16D4-MHK is supplied in tube packaging, while ATXMEGA16D4-MH is supplied in tray packaging. Both maintain identical 44-VQFN (7x7) exposed pad physical form factor and are functionally interchangeable at the circuit level. Both parts are Active status products with RoHS3 compliance and REACH unaffected designation.

Parameter Comparison

Parameter	ATXMEGA16D4-MHK	ATXMEGA16D4-MH
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
Voltage Supply (Vcc/Vdd)	1.6V ~ 3.6V	1.6V ~ 3.6V
Number of I/O	34	34
Data Converters	A/D 12x12b	A/D 12x12b
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
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	44-VQFN (7x7) Exposed Pad	44-VQFN (7x7) Exposed Pad
Packaging Format	Tube	Tray
Product Status	Active	Active
RoHS Status	RoHS3 Compliant	RoHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both ATXMEGA16D4-MHK and ATXMEGA16D4-MH are suitable for direct substitution in applications requiring AVR XMEGA D4 microcontroller functionality. Selection between these parts should be based on manufacturing and supply chain requirements rather than electrical or functional considerations.

The ATXMEGA16D4-MHK (tube packaging) is appropriate for applications with lower volume requirements or manual assembly processes. The ATXMEGA16D4-MH (tray packaging) is suitable for high-volume automated assembly operations where tray-format components integrate with standard pick-and-place equipment.

Both parts maintain Active product status with Microchip Technology, ensuring continued availability and technical support. Both are RoHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for industrial and commercial applications. The identical MSL rating (3, 168 hours) indicates equivalent moisture sensitivity handling requirements during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Are ATXMEGA16D4-MHK and ATXMEGA16D4-MH electrically identical?

A: Yes. Both parts are parametrically equivalent across all electrical specifications including processor architecture, clock speed, memory configuration, I/O count, voltage supply range, and peripheral features. They are functionally interchangeable at the circuit level.

Q: What is the difference between these two part numbers?

A: The primary difference is packaging format. ATXMEGA16D4-MHK is supplied in tube packaging, while ATXMEGA16D4-MH is supplied in tray packaging. Both use the identical 44-VQFN (7x7) physical form factor.

Q: Can I use ATXMEGA16D4-MH in place of ATXMEGA16D4-MHK in my design?

A: Yes. The parts are functionally equivalent and can be used interchangeably in circuit designs. Packaging format selection should be based on manufacturing assembly requirements and supply chain logistics.

Q: Do these parts have the same moisture sensitivity level?

A: Yes. Both parts have MSL rating 3 (168 hours), requiring identical moisture handling and storage protocols during manufacturing and assembly.

Q: Are both parts RoHS3 compliant?

A: Yes. Both ATXMEGA16D4-MHK and ATXMEGA16D4-MH are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the operating temperature range for these microcontrollers?

A: Both parts operate across the temperature range of -40°C to 85°C (TA), suitable for industrial and commercial applications.

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