R5F2138ASDFP#30 Equivalent & Substitute Parts

Part Overview

The R5F2138ASDFP#30 is a 16-bit microcontroller from Renesas Electronics Corporation's R8C/3x/38T-A series, designed for embedded applications requiring moderate processing capability and integrated connectivity. This device features 96KB of FLASH program memory, 8KB of RAM, and 4KB of EEPROM, operating at 20MHz with a supply voltage range of 1.8V to 5.5V. The part is mounted in an 80-LQFP package and maintains Active product status with full RoHS3 compliance. Equivalent and substitute parts are identified when they meet the core functional requirements: 16-bit core architecture, 96KB FLASH memory capacity, compatible operating temperature range, and surface mount packaging suitable for the application.

Key Parameters

Parameter	Value
Manufacturer Part Number	R5F2138ASDFP#30
Manufacturer	Renesas Electronics Corporation
Series	R8C/3x/38T-A
Core Processor	R8C
Core Size	16-Bit
Program Memory Size	96KB (96K x 8)
Program Memory Type	FLASH
Operating Speed	20MHz
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	80-LQFP (12x12)
Product Status	Active
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the R5F2138ASDFP#30 is determined by the following critical parameters:

Core Architecture: 16-bit processor core
Program Memory Capacity: 96KB FLASH minimum
Operating Temperature Range: -40°C to 85°C
Supply Voltage Compatibility: Overlapping or compatible voltage ranges
Mounting Type: Surface mount technology
Product Status: Active status ensuring continued availability and support
Compliance Standards: RoHS3 compliance for regulatory alignment

The R5F111PFAFB#30 qualifies as a substitute based on matching core architecture (16-bit), identical program memory capacity (96KB FLASH), compatible operating temperature range (-40°C to 85°C), surface mount packaging, Active product status, and RoHS3 compliance. Differences in package footprint (100-LFQFP vs. 80-LQFP), operating speed (24MHz vs. 20MHz), and supply voltage range (1.6V–3.6V vs. 1.8V–5.5V) require board-level design verification.

Parameter Comparison

Parameter	R5F2138ASDFP#30	R5F111PFAFB#30
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Core Size	16-Bit	16-Bit
Program Memory Size	96KB (96K x 8)	96KB (96K x 8)
Program Memory Type	FLASH	FLASH
Operating Speed	20MHz	24MHz
Voltage Supply Range	1.8V ~ 5.5V	1.6V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package Type	80-LQFP (12x12)	100-LFQFP (14x14)
Number of I/O	75	73
EEPROM Size	4K x 8	8K x 8
RAM Size	8K x 8	10K x 8
Product Status	Active	Active
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Both the R5F2138ASDFP#30 and R5F111PFAFB#30 maintain Active product status with full RoHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory alignment and long-term supply continuity. Selection between these parts depends on specific application requirements:

The R5F2138ASDFP#30 is appropriate for applications with existing board layouts designed for 80-LQFP packaging, systems requiring the extended supply voltage range (1.8V–5.5V), or designs where the 20MHz operating speed is sufficient.

The R5F111PFAFB#30 is suitable for applications that can accommodate the larger 100-LFQFP package footprint, benefit from the higher 24MHz operating speed, require the narrower supply voltage range (1.6V–3.6V), or need increased EEPROM (8KB vs. 4KB) and RAM (10KB vs. 8KB) capacity.

Both parts are manufactured by Renesas Electronics Corporation and carry identical compliance certifications, supporting equivalent reliability and quality standards.

Frequently Asked Questions (FAQ)

Q: Can the R5F111PFAFB#30 directly replace the R5F2138ASDFP#30 on an existing PCB?

A: Direct PCB replacement is not possible due to package differences. The R5F2138ASDFP#30 uses an 80-LQFP (12x12mm) package, while the R5F111PFAFB#30 uses a 100-LFQFP (14x14mm) package. PCB redesign and re-layout are required for substitution.

Q: Are there voltage supply compatibility concerns between these parts?

A: The R5F2138ASDFP#30 operates from 1.8V to 5.5V, while the R5F111PFAFB#30 operates from 1.6V to 3.6V. If your system uses supply voltages above 3.6V, the R5F111PFAFB#30 cannot be used. Verify your power supply design before substitution.

Q: What is the difference in I/O pin count between these microcontrollers?

A: The R5F2138ASDFP#30 provides 75 I/O pins, while the R5F111PFAFB#30 provides 73 I/O pins. The larger package of the R5F111PFAFB#30 does not result in additional I/O availability. Application designs must account for this difference.

Q: Do both parts support the same connectivity protocols?

A: Both parts support I2C, LINbus, and UART/USART connectivity. The R5F2138ASDFP#30 includes SIO and SSU protocols, while the R5F111PFAFB#30 includes CSI. Verify protocol requirements for your application.

Q: What are the memory differences between these parts?

A: Both parts have 96KB FLASH program memory. The R5F111PFAFB#30 provides larger EEPROM (8KB vs. 4KB) and RAM (10KB vs. 8KB) capacity, which may benefit applications requiring additional data storage or working memory.

Q: Are both parts suitable for industrial temperature applications?

A: Both parts operate across the -40°C to 85°C temperature range, supporting industrial and extended commercial applications within this specification.

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