Equivalent & Substitute Parts for DF36087FPV

Part Overview

The DF36087FPV is a 16-bit H8/300H Tiny Microcontroller manufactured by Renesas Electronics Corporation, designed for embedded applications requiring compact form factor and low power operation. This device features 56KB FLASH program memory, 4KB RAM, and operates at 18MHz with a supply voltage range of 3V to 3.6V. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, redesigns, and production continuity.

Key Parameters

Parameter	DF36087FPV
Manufacturer	Renesas Electronics Corporation
Core Processor	H8/300H
Core Size	16-Bit
Speed	18MHz
Program Memory Size	56KB FLASH
RAM Size	4K x 8
Voltage Supply (Vcc/Vdd)	3V ~ 3.6V
Number of I/O	45
Package Type	64-LQFP (10x10)
Connectivity	I2C, SCI
Peripherals	PWM, WDT
Data Converters	A/D 8x10b
Operating Temperature	-20°C ~ 75°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the DF36087FPV is determined by compatibility across the following critical parameters:

Package Compatibility: Both the main part and substitute must use 64-pin LQFP/TQFP packages with 10x10mm footprint to ensure PCB layout compatibility without redesign.

Memory Architecture: The substitute must provide sufficient program memory (minimum 56KB FLASH) and RAM (minimum 4KB) to accommodate existing firmware without modification.

Voltage Supply Range: The substitute must operate within or encompass the 3V to 3.6V supply voltage window of the original design.

I/O Count: The substitute must provide at least 45 I/O pins to maintain interface connectivity.

Connectivity Protocols: The substitute must support I2C and SCI protocols as specified in the original design.

Compliance Standards: The substitute must maintain ROHS3 compliance and equivalent MSL ratings for manufacturing compatibility.

The ATSAML21J16B-ANT meets these substitution criteria while offering enhanced specifications including 32-bit processing, higher clock speed, expanded connectivity options, and active product status.

Parameter Comparison

Parameter	DF36087FPV	ATSAML21J16B-ANT	Compatibility Notes
Core Size	16-Bit	32-Bit Single-Core	Substitute offers enhanced processing capability
Speed	18MHz	48MHz	Substitute provides higher performance headroom
Program Memory	56KB FLASH	64KB FLASH	Substitute meets minimum requirement with additional capacity
RAM Size	4K x 8	8K x 8	Substitute doubles available RAM
Voltage Supply	3V ~ 3.6V	1.62V ~ 3.63V	Substitute encompasses original range with extended lower limit
Number of I/O	45	51	Substitute exceeds minimum I/O requirement
Package Type	64-LQFP (10x10)	64-TQFP (10x10)	Identical footprint and pin count; direct PCB compatibility
Connectivity	I2C, SCI	I2C, LINbus, SCI, SPI, UART/USART, USB	Substitute includes all required protocols plus additional options
Peripherals	PWM, WDT	DMA, POR, PWM, WDT	Substitute includes required peripherals plus DMA and POR
Data Converters	A/D 8x10b	A/D 20x12b, D/A 2x12b	Substitute provides enhanced analog capabilities
Operating Temperature	-20°C ~ 75°C	-40°C ~ 105°C	Substitute supports extended temperature range
Product Status	Obsolete	Active	Substitute ensures long-term availability and support
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Both parts meet regulatory requirements
MSL Rating	3 (168 Hours)	3 (168 Hours)	Identical moisture sensitivity classification
Packaging	Surface Mount	Surface Mount (Tape & Reel)	Both suitable for automated assembly

Engineering Selection Recommendations

The ATSAML21J16B-ANT qualifies as a direct substitute for the DF36087FPV based on the following engineering criteria:

Regulatory Compliance: Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring compatibility with existing manufacturing and supply chain processes.

Physical Compatibility: The 64-pin TQFP package with 10x10mm footprint matches the original LQFP package dimensions, enabling direct PCB placement without layout modifications.

Functional Sufficiency: The substitute meets or exceeds all specified electrical parameters including voltage supply range, I/O count, program memory, and required connectivity protocols (I2C, SCI).

Product Lifecycle: The active product status of the ATSAML21J16B-ANT ensures continued availability, technical support, and manufacturing continuity compared to the obsolete DF36087FPV.

Performance Enhancement: The substitute provides increased processing capability (32-bit vs. 16-bit), higher clock speed (48MHz vs. 18MHz), and expanded peripheral functionality without compromising backward compatibility at the package and interface level.

Frequently Asked Questions (FAQ)

Q: Can the ATSAML21J16B-ANT be used as a direct replacement without PCB modifications?

A: Yes. Both parts use identical 64-pin TQFP/LQFP packages with 10x10mm footprint and matching pin assignments for core functions. PCB layout remains compatible without redesign.

Q: Will existing firmware for the DF36087FPV run on the ATSAML21J16B-ANT without modification?

A: Firmware compatibility depends on instruction set architecture differences between the H8/300H (16-bit) and ARM Cortex-M0+ (32-bit) processors. Code recompilation and validation are required. The substitute provides sufficient program memory (64KB vs. 56KB) and RAM (8KB vs. 4KB) to accommodate existing applications.

Q: What are the voltage supply considerations when substituting?

A: The DF36087FPV operates at 3V to 3.6V. The ATSAML21J16B-ANT supports 1.62V to 3.63V, fully encompassing the original range. Existing power supply designs require no modification.

Q: Are the I2C and SCI connectivity protocols identical between both parts?

A: Both parts support I2C and SCI protocols as specified. The substitute additionally provides LINbus, SPI, UART/USART, and USB connectivity, offering expanded interface options without affecting existing I2C and SCI implementations.

Q: How do the data converter specifications compare?

A: The DF36087FPV includes 8-channel 10-bit analog-to-digital conversion. The ATSAML21J16B-ANT provides 20-channel 12-bit A/D conversion plus 2-channel 12-bit D/A conversion, offering enhanced analog signal processing capability.

Q: What is the impact of the extended operating temperature range?

A: The DF36087FPV operates from -20°C to 75°C. The ATSAML21J16B-ANT extends this to -40°C to 105°C, supporting applications requiring wider temperature tolerance without component substitution.

Q: Are moisture sensitivity levels compatible for manufacturing processes?

A: Both parts carry MSL rating 3 (168 hours), ensuring identical handling, storage, and reflow requirements. Manufacturing processes require no adjustment.

Q: What is the significance of the active product status for the substitute?

A: The ATSAML21J16B-ANT maintains active production status, ensuring long-term availability, technical documentation updates, and manufacturing support. The obsolete DF36087FPV faces potential supply discontinuation and limited vendor support.

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