R5F10RFAAFP#X0 Equivalent & Substitute Parts

Part Overview

The R5F10RFAAFP#X0 is a 16-bit RL78/L12 microcontroller manufactured by Renesas Electronics Corporation, featuring 16KB FLASH program memory, 1KB RAM, and 2KB EEPROM. This device integrates a 24MHz RL78 core processor with comprehensive connectivity options including CSI, I2C, LINbus, and UART/USART interfaces, along with peripheral functions such as DMA, LCD driver, LVD, POR, PWM, and WDT. The part is packaged in a 44-LQFP (10x10) surface mount configuration with 29 I/O pins and operates across a supply voltage range of 1.6V to 5.5V.

The R5F10RFAAFP#X0 carries an Obsolete product status. Locating equivalent substitute parts is necessary for ongoing design support, production continuity, and system maintenance where this microcontroller is deployed in existing applications.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Series	RL78/L12
Core Processor	RL78
Core Size	16-Bit
Speed	24MHz
Program Memory Size	16KB (16K x 8)
Program Memory Type	FLASH
EEPROM Size	2K x 8
RAM Size	1K x 8
Voltage Supply (Vcc/Vdd)	1.6V ~ 5.5V
Package / Case	44-LQFP (10x10)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the R5F10RFAAFP#X0 is determined by strict equivalence across the following critical parameters:

Manufacturer & Series: Both parts must be Renesas Electronics Corporation RL78/L12 microcontrollers to ensure firmware compatibility and peripheral architecture alignment.
Core Processor & Architecture: RL78 16-bit core at 24MHz is mandatory for instruction set and timing compatibility.
Memory Configuration: Program memory (16KB FLASH), EEPROM (2KB), and RAM (1KB) must match exactly.
Package & Pinout: 44-LQFP (10x10) surface mount package ensures mechanical and electrical compatibility with existing PCB layouts.
Voltage Supply Range: 1.6V ~ 5.5V operating range must be maintained.
Connectivity & Peripherals: CSI, I2C, LINbus, UART/USART interfaces and DMA, LCD, LVD, POR, PWM, WDT functions must be present.
Compliance: RoHS3 compliance and identical MSL rating (3, 168 Hours) are required.

The R5F10RFAAFP#50 qualifies as a direct substitute based on these parameters. The primary distinction is packaging format (Tape & Reel vs. standard packaging) and product status (Active vs. Obsolete), which do not affect electrical or functional equivalence.

Parameter Comparison

Parameter	R5F10RFAAFP#X0	R5F10RFAAFP#50	Match
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation	✓
Series	RL78/L12	RL78/L12	✓
Core Processor	RL78	RL78	✓
Core Size	16-Bit	16-Bit	✓
Speed	24MHz	24MHz	✓
Program Memory Size	16KB (16K x 8)	16KB (16K x 8)	✓
Program Memory Type	FLASH	FLASH	✓
EEPROM Size	2K x 8	2K x 8	✓
RAM Size	1K x 8	1K x 8	✓
Voltage Supply (Vcc/Vdd)	1.6V ~ 5.5V	1.6V ~ 5.5V	✓
Package / Case	44-LQFP (10x10)	44-LQFP (10x10)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
MSL Rating	3 (168 Hours)	3 (168 Hours)	✓
Product Status	Obsolete	Active	Different
Packaging Format	Standard	Tape & Reel (TR)	Different

Engineering Selection Recommendations

The R5F10RFAAFP#50 is a direct electrical and functional equivalent to the R5F10RFAAFP#X0. All critical parameters—core architecture, memory configuration, package geometry, voltage specifications, and compliance certifications—are identical.

The R5F10RFAAFP#50 carries Active product status, providing ongoing manufacturer support and supply chain availability, whereas the R5F10RFAAFP#X0 is Obsolete. Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring equivalent reliability and environmental performance.

The packaging format difference (Tape & Reel for the #50 variant) is a supply chain consideration only and does not affect electrical performance or PCB integration. Selection between these parts should be based on procurement requirements and supply availability.

Frequently Asked Questions (FAQ)

Q: Are the R5F10RFAAFP#X0 and R5F10RFAAFP#50 pin-compatible?

A: Yes. Both parts use the 44-LQFP (10x10) package with identical pinout and electrical characteristics. Direct PCB substitution is possible without layout modifications.

Q: Will firmware compiled for the R5F10RFAAFP#X0 run on the R5F10RFAAFP#50?

A: Yes. Both microcontrollers share the identical RL78 16-bit core processor, instruction set, memory architecture, and peripheral configuration. Firmware compatibility is guaranteed.

Q: What is the difference between the #X0 and #50 part number suffixes?

A: The suffix indicates packaging format. The #X0 variant uses standard packaging, while the #50 variant is supplied in Tape & Reel (TR) format for automated assembly. Electrical specifications are identical.

Q: Can I use the R5F10RFAAFP#50 in a design originally specified for the R5F10RFAAFP#X0?

A: Yes. The R5F10RFAAFP#50 is a direct substitute. All electrical, thermal, and mechanical parameters match the original specification. The Active product status of the #50 variant provides improved long-term availability.

Q: Are there any differences in compliance or certifications between these parts?

A: No. Both parts carry identical RoHS3 compliance, REACH Unaffected status, MSL rating (3, 168 Hours), and ECCN/HTSUS classifications.

Q: What are the key parameters that determine substitution eligibility for RL78/L12 microcontrollers?

A: Substitution requires matching: manufacturer (Renesas), series (RL78/L12), core processor (RL78 16-bit), clock speed (24MHz), memory sizes (16KB FLASH, 2KB EEPROM, 1KB RAM), package type (44-LQFP), voltage range (1.6V ~ 5.5V), and compliance certifications (RoHS3, MSL 3).

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