R5F2138ASNFP#30 Equivalent & Substitute Parts

Part Overview

The R5F2138ASNFP#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 currently in active production status with 680 units available in stock. Substitute parts are identified when equivalent functional requirements can be met through alternative microcontroller architectures that maintain compatibility across critical electrical and mechanical parameters.

Substiute Parts

R5F2138ASNFP#30

Renesas Electronics CorporationIn Stock: 768R5F2138ASNFP#30 Datasheet

Current PartRFQ

R5F111PFAFB#30

Renesas Electronics CorporationIn Stock: 103036R5F111PFAFB#30 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the R5F2138ASNFP#30 is determined by the following critical parameters:

• Core Architecture: 16-bit processor capability
• Program Memory Capacity: Minimum 96KB FLASH
• RAM Capacity: Minimum 8KB
• EEPROM Capacity: Minimum 4KB
• Operating Speed: Minimum 20MHz
• Supply Voltage Compatibility: Overlapping voltage range with 1.8V ~ 5.5V
• Package Form Factor: Surface mount with compatible pin count and footprint
• Connectivity Interfaces: I2C, UART/USART, and LINbus support
• Regulatory Compliance: ROHS3 and REACH status alignment
• Product Status: Active production status

The R5F111PFAFB#30 qualifies as a substitute based on meeting or exceeding these parameters across the 16-bit microcontroller category, despite architectural differences between the R8C and RL78 processor families.

Parameter Comparison

Engineering Selection Recommendations

Both the R5F2138ASNFP#30 and R5F111PFAFB#30 maintain active production status with ROHS3 compliance and REACH unaffected designation, ensuring regulatory alignment for current and future applications. The R5F111PFAFB#30 provides enhanced performance specifications including 24MHz operating speed versus 20MHz, expanded RAM capacity of 10K x 8 versus 8K x 8, and extended EEPROM of 8K x 8 versus 4K x 8. However, the R5F111PFAFB#30 operates within a narrower supply voltage range of 1.6V to 3.6V compared to the main part's 1.8V to 5.5V range, and requires a larger 100-LFQFP package footprint versus the 80-LQFP form factor. Selection between these parts depends on application-specific requirements regarding package size constraints, supply voltage specifications, and memory capacity needs.

Frequently Asked Questions (FAQ)

Q: What defines substitution compatibility for the R5F2138ASNFP#30?

A: Substitutes must maintain 16-bit core architecture, minimum 96KB FLASH program memory, minimum 8KB RAM, minimum 4KB EEPROM, and support for I2C, UART/USART, and LINbus connectivity interfaces. Both parts must carry active production status and equivalent regulatory compliance certifications.

Q: How do package differences affect substitution feasibility?

A: The R5F2138ASNFP#30 uses an 80-LQFP (12x12) package while the R5F111PFAFB#30 uses a 100-LFQFP (14x14) package. These are not pin-compatible and require PCB redesign. Package selection depends on available board space and pin count requirements for the target application.

Q: What are the voltage supply considerations when substituting these parts?

A: The main part operates across 1.8V to 5.5V, while the substitute operates across 1.6V to 3.6V. Applications requiring operation above 3.6V cannot use the R5F111PFAFB#30 as a direct substitute without power supply modifications.

Q: Does the R5F111PFAFB#30 provide performance advantages?

A: The R5F111PFAFB#30 operates at 24MHz versus 20MHz, provides additional RAM (10K x 8 versus 8K x 8) and EEPROM (8K x 8 versus 4K x 8), and supports an extended operating temperature range of -40°C to 85°C versus -20°C to 85°C.

Q: Are these parts from the same processor family?

A: No. The R5F2138ASNFP#30 belongs to the R8C/3x/38T-A series, while the R5F111PFAFB#30 belongs to the RL78/L1C series. Both are 16-bit Renesas microcontrollers but use different processor architectures and require separate firmware development or adaptation.