R5F100LCGFB#50 Equivalent & Substitute Parts

Part Overview

The R5F100LCGFB#50 is a 16-bit RL78/G13 microcontroller manufactured by Renesas Electronics Corporation, featuring 32KB FLASH program memory, 4KB EEPROM, and 2KB RAM. This device operates at 32MHz with integrated connectivity options including CSI, I2C, LINbus, and UART/USART interfaces. The part is actively produced and maintains ROHS3 compliance with REACH unaffected status. Identifying equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate packaging or inventory constraints while maintaining functional and electrical compatibility.

Key Parameters

Parameter	Value
Core Processor	RL78
Core Size	16-Bit
Speed	32MHz
Program Memory Size	32KB (32K x 8)
Program Memory Type	FLASH
EEPROM Size	4K x 8
RAM Size	2K x 8
Voltage Supply (Vcc/Vdd)	2.4V ~ 5.5V
Number of I/O	48
Data Converters	A/D 12x8/10b
Connectivity	CSI, I2C, LINbus, UART/USART
Peripherals	DMA, LVD, POR, PWM, WDT
Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the R5F100LCGFB#50 is determined by strict equivalence across the following critical parameters:

Core processor architecture (RL78)
Core size (16-Bit)
Operating frequency (32MHz)
Program memory capacity and type (32KB FLASH)
EEPROM and RAM sizes (4K x 8 and 2K x 8 respectively)
Supply voltage range (2.4V ~ 5.5V)
I/O count (48 pins)
Connectivity interfaces (CSI, I2C, LINbus, UART/USART)
Peripheral feature set (DMA, LVD, POR, PWM, WDT)
Data converter specifications (A/D 12x8/10b)
Operating temperature range (-40°C ~ 105°C)
Compliance certifications (ROHS3, REACH unaffected)

The R5F100LCGFB#50 differs from its substitute only in package configuration. The main part uses 64-LFQFP (10x10mm) packaging, while the substitute uses 64-LQFP (12x12mm) packaging. Both package types are surface mount configurations with identical pin counts and electrical characteristics.

Parameter Comparison

Parameter	R5F100LCGFB#50	R5F100LCGFA#50
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Series	RL78/G13	RL78/G13
Core Processor	RL78	RL78
Core Size	16-Bit	16-Bit
Speed	32MHz	32MHz
Program Memory Size	32KB (32K x 8)	32KB (32K x 8)
Program Memory Type	FLASH	FLASH
EEPROM Size	4K x 8	4K x 8
RAM Size	2K x 8	2K x 8
Voltage Supply (Vcc/Vdd)	2.4V ~ 5.5V	2.4V ~ 5.5V
Number of I/O	48	48
Data Converters	A/D 12x8/10b	A/D 12x8/10b
Connectivity	CSI, I2C, LINbus, UART/USART	CSI, I2C, LINbus, UART/USART
Peripherals	DMA, LVD, POR, PWM, WDT	DMA, LVD, POR, PWM, WDT
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	64-LFQFP (10x10)	64-LQFP (12x12)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Active

Engineering Selection Recommendations

Both the R5F100LCGFB#50 and R5F100LCGFA#50 are actively produced devices with identical electrical specifications and functional capabilities. Selection between these parts should be based on printed circuit board layout requirements and available board space.

The R5F100LCGFB#50 with 64-LFQFP (10x10mm) packaging is suitable for designs requiring compact footprints and higher component density. The R5F100LCGFA#50 with 64-LQFP (12x12mm) packaging accommodates designs with less stringent space constraints or where larger package dimensions are preferred for thermal management or manufacturing considerations.

Both parts maintain identical compliance certifications (ROHS3 compliant, REACH unaffected) and moisture sensitivity levels (MSL 3, 168 hours). Pin configuration and electrical characteristics are functionally equivalent, enabling direct substitution at the schematic and firmware levels when package dimensions are accommodated in the PCB design.

Frequently Asked Questions (FAQ)

Q: Can R5F100LCGFA#50 be used as a direct replacement for R5F100LCGFB#50?

A: Yes, the R5F100LCGFA#50 is a functional equivalent. The primary difference is package size: 64-LQFP (12x12mm) versus 64-LFQFP (10x10mm). Substitution requires PCB layout modification to accommodate the larger package footprint. All electrical, memory, and peripheral specifications are identical.

Q: What are the key parameters that define substitution eligibility?

A: Substitution eligibility is determined by matching core processor (RL78), core size (16-Bit), operating frequency (32MHz), program memory (32KB FLASH), EEPROM (4K x 8), RAM (2K x 8), supply voltage (2.4V ~ 5.5V), I/O count (48), connectivity interfaces, peripheral features, and operating temperature range (-40°C ~ 105°C).

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

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical MSL ratings (3, 168 hours). Compliance certifications and environmental standards are equivalent.

Q: What is the impact of package size difference on circuit design?

A: The 64-LFQFP (10x10mm) package occupies less PCB area than the 64-LQFP (12x12mm) package. Substitution requires verification that the larger package footprint fits within available board space and does not conflict with adjacent components or routing constraints.

Q: Are firmware and software changes required when substituting these parts?

A: No firmware or software modifications are required. Both parts implement identical RL78/G13 architecture, memory configuration, and peripheral interfaces. Existing firmware compiled for the R5F100LCGFB#50 executes without modification on the R5F100LCGFA#50.

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