Equivalent & Substitute Parts for R5F104LEGFB#10

Part Overview

The R5F104LEGFB#10 is a 16-bit RL78/G14 microcontroller manufactured by Renesas Electronics Corporation. This embedded microcontroller IC features 64KB FLASH program memory, 4KB EEPROM, and 5.5KB RAM with a 32MHz operating frequency. The device is housed in a 64-LFQFP (10x10mm) surface mount package and operates across a supply voltage range of 2.4V to 5.5V with an operating temperature range of -40°C to 105°C.

The R5F104LEGFB#10 maintains Active product status and holds ROHS3 compliance certification. Substitute parts are necessary when specific package form factors, inventory availability, or board layout constraints require alternative physical configurations while maintaining identical electrical and functional specifications.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Series	RL78/G14
Core Processor	RL78
Core Size	16-Bit
Speed	32MHz
Program Memory Size	64KB (64K x 8)
Program Memory Type	FLASH
EEPROM Size	4K x 8
RAM Size	5.5K x 8
Number of I/O	48
Voltage Supply (Vcc/Vdd)	2.4V ~ 5.5V
Data Converters	A/D 12x8/10b
Connectivity	CSI, I2C, LINbus, UART/USART
Peripherals	DMA, LVD, POR, PWM, WDT
Oscillator Type	Internal
Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the R5F104LEGFB#10 is determined by electrical and functional parameter equivalence within the RL78/G14 microcontroller family. All substitute parts maintain identical specifications across the following critical parameters:

Electrical Equivalence Parameters:

Core processor architecture (RL78)
Core size (16-Bit)
Operating frequency (32MHz)
Program memory capacity (64KB FLASH)
EEPROM capacity (4K x 8)
RAM capacity (5.5K x 8)
I/O count (48 pins)
Supply voltage range (2.4V ~ 5.5V)
Data converter configuration (A/D 12x8/10b)
Connectivity interfaces (CSI, I2C, LINbus, UART/USART)
Peripheral set (DMA, LVD, POR, PWM, WDT)
Operating temperature range (-40°C ~ 105°C)

Compliance Parameters:

Product status (Active)
RoHS certification (ROHS3 Compliant)
Moisture sensitivity level (MSL 3)
REACH status (REACH Unaffected)

The primary distinction among substitute parts lies in the physical package form factor and associated pad layout dimensions. Substitute parts are available in three package configurations: 64-LFQFP (10x10mm), 64-LQFP (12x12mm), and 64-LQFP (14x14mm). Selection of the appropriate substitute is based on printed circuit board layout requirements and available board space.

Parameter Comparison

Parameter	R5F104LEGFB#10	R5F104LEGFB#30	R5F104LEGFA#30	R5F104LEGFP#30
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation	Renesas Electronics Corporation	Renesas Electronics Corporation
Series	RL78/G14	RL78/G14	RL78/G14	RL78/G14
Core Processor	RL78	RL78	RL78	RL78
Core Size	16-Bit	16-Bit	16-Bit	16-Bit
Speed	32MHz	32MHz	32MHz	32MHz
Program Memory Size	64KB (64K x 8)	64KB (64K x 8)	64KB (64K x 8)	64KB (64K x 8)
Program Memory Type	FLASH	FLASH	FLASH	FLASH
EEPROM Size	4K x 8	4K x 8	4K x 8	4K x 8
RAM Size	5.5K x 8	5.5K x 8	5.5K x 8	5.5K x 8
Number of I/O	48	48	48	48
Voltage Supply (Vcc/Vdd)	2.4V ~ 5.5V	2.4V ~ 5.5V	2.4V ~ 5.5V	2.4V ~ 5.5V
Data Converters	A/D 12x8/10b	A/D 12x8/10b	A/D 12x8/10b	A/D 12x8/10b
Connectivity	CSI, I2C, LINbus, UART/USART	CSI, I2C, LINbus, UART/USART	CSI, I2C, LINbus, UART/USART	CSI, I2C, LINbus, UART/USART
Peripherals	DMA, LVD, POR, PWM, WDT	DMA, LVD, POR, PWM, WDT	DMA, LVD, POR, PWM, WDT	DMA, LVD, POR, PWM, WDT
Oscillator Type	Internal	Internal	Internal	Internal
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	64-LFQFP (10x10)	64-LFQFP (10x10)	64-LQFP (12x12)	64-LQFP (14x14)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and functional equivalence to the R5F104LEGFB#10. Selection among the available substitutes is determined by physical package requirements and board layout constraints.

R5F104LEGFB#30 is electrically and functionally identical to the R5F104LEGFB#10, differing only in the packaging designation suffix (#30 versus #10). Both devices utilize the 64-LFQFP (10x10mm) package form factor. This part is selected when the 10x10mm package footprint is required and higher inventory availability is beneficial.

R5F104LEGFA#30 utilizes a 64-LQFP (12x12mm) package form factor. This larger package provides increased board spacing and is selected when PCB layout accommodates the expanded footprint dimensions.

R5F104LEGFP#30 utilizes a 64-LQFP (14x14mm) package form factor. This largest package option is selected when maximum board spacing is available or when design requirements specify the 14x14mm footprint.

All substitute parts maintain Active product status and hold identical compliance certifications: ROHS3 compliance, MSL 3 rating, and REACH Unaffected status. No functional or electrical performance differences exist among these parts. Selection is based exclusively on physical package dimensions and board layout requirements.

Frequently Asked Questions (FAQ)

Q: Are the R5F104LEGFB#10, R5F104LEGFB#30, R5F104LEGFA#30, and R5F104LEGFP#30 electrically identical?

A: Yes. All four parts are electrically and functionally identical. They share identical core processor architecture, memory configuration, operating frequency, supply voltage range, I/O count, connectivity interfaces, and peripheral sets. The only differences are the physical package form factors and associated pad layouts.

Q: What is the difference between the 64-LFQFP (10x10mm) and 64-LQFP (12x12mm) packages?

A: The 64-LFQFP (10x10mm) package is a fine-pitch quad flat package with smaller overall dimensions. The 64-LQFP (12x12mm) package is a larger quad flat package. Both contain 64 pins with identical electrical functionality. The selection between these packages is determined by available PCB board space and layout requirements.

Q: Can I substitute R5F104LEGFB#10 with R5F104LEGFP#30?

A: Yes, from an electrical and functional standpoint. However, the R5F104LEGFP#30 uses a 64-LQFP (14x14mm) package, which is larger than the 64-LFQFP (10x10mm) package of the R5F104LEGFB#10. PCB layout modifications are required to accommodate the larger footprint and pad spacing.

Q: Do all substitute parts have the same compliance certifications?

A: Yes. All substitute parts maintain ROHS3 compliance, MSL 3 rating (168 Hours), and REACH Unaffected status. All parts are Active products manufactured by Renesas Electronics Corporation.

Q: What determines which substitute part to select?

A: Selection is based on physical package dimensions and PCB layout requirements. The R5F104LEGFB#10 and R5F104LEGFB#30 both use the 10x10mm package. The R5F104LEGFA#30 uses a 12x12mm package. The R5F104LEGFP#30 uses a 14x14mm package. Choose the part whose package dimensions fit your board layout.

Q: Are there any performance differences between these parts?

A: No. All parts operate at 32MHz, provide 64KB FLASH memory, 4KB EEPROM, 5.5KB RAM, 48 I/O pins, and identical peripheral functionality. Performance is identical across all substitute options.

Q: What is the significance of the suffix numbers (#10 and #30) in the part numbers?

A: The suffix designates the packaging and tape/reel configuration. Both #10 and #30 variants are supplied in trays. The suffix does not affect electrical or functional specifications.

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