UPD78F0740MA-FAA-AX Equivalent & Substitute Parts

Part Overview

The UPD78F0740MA-FAA-AX is an 8-bit microcontroller from Renesas Electronics Corporation's 78K0/Ix2 series, designed for embedded applications requiring compact flash memory and low-power operation. This device features 4KB of FLASH program memory, 384 bytes of RAM, and operates across a wide supply voltage range of 2.7V to 5.5V. The part is currently in active production status with 1033 units available in new original stock. Alternative components may be required due to design evolution, supply chain considerations, or application-specific performance requirements.

Substiute Parts

UPD78F0740MA-FAA-AX

Renesas Electronics CorporationIn Stock: 1125UPD78F0740MA-FAA-AX Datasheet

Current PartRFQ

R5F10Y47ASP#30

Renesas Electronics CorporationIn Stock: 11370R5F10Y47ASP#30 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UPD78F0740MA-FAA-AX is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use 16-SSOP/16-LSSOP surface mount packaging with identical 0.173" (4.40mm) width to ensure PCB layout compatibility
• Program Memory Capacity: Minimum 4KB FLASH memory required to accommodate existing firmware
• Supply Voltage Range: Operating voltage window must encompass or exceed 2.7V ~ 5.5V to maintain system compatibility
• Mounting Type: Surface mount technology required for automated assembly processes
• Compliance Standards: RoHS3 compliance and REACH unaffected status required for regulatory alignment

The R5F10Y47ASP#30 qualifies as a substitute based on matching package geometry, equivalent program memory capacity, compatible supply voltage range, and identical compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the UPD78F0740MA-FAA-AX and R5F10Y47ASP#30 maintain active production status with ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment for current and future applications. Selection between these parts should be based on application-specific requirements:

The UPD78F0740MA-FAA-AX is appropriate for applications requiring the 78K/0 8-bit processor architecture with extended upper operating temperature capability to 105°C and the established 78K0/Ix2 software ecosystem.

The R5F10Y47ASP#30 provides enhanced processing capability through 16-bit architecture and increased clock speed (20MHz versus 10MHz), along with additional RAM (512 x 8 versus 384 x 8) and one additional I/O pin. This substitute is suitable for applications where increased computational performance or expanded memory access patterns provide system-level benefits. The lower maximum operating temperature of 85°C versus 105°C must be evaluated against specific thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can the R5F10Y47ASP#30 be used as a direct replacement for the UPD78F0740MA-FAA-AX?

A: Physical and electrical compatibility is established through matching 16-SSOP/16-LSSOP package geometry, equivalent 4KB FLASH memory capacity, and overlapping supply voltage ranges. However, the architectural difference (16-bit versus 8-bit processor) and different processor cores (RL78 versus 78K/0) require firmware validation and may necessitate code modifications depending on application-specific instruction set dependencies.

Q: What are the package differences between 16-LSSOP and 16-SSOP?

A: Both packages share identical external dimensions (0.173" width, 4.40mm) and pin count (16 pins) for PCB layout purposes. LSSOP and SSOP designations reflect minor internal lead frame variations that do not affect board-level compatibility or mounting procedures.

Q: Is the lower maximum operating temperature of the R5F10Y47ASP#30 a limiting factor?

A: The R5F10Y47ASP#30 operates to 85°C maximum versus 105°C for the UPD78F0740MA-FAA-AX. Applications requiring sustained operation above 85°C ambient temperature must retain the original part. Applications with maximum ambient temperatures at or below 85°C are unaffected by this specification difference.

Q: Are both parts suitable for high-reliability applications?

A: Both parts carry identical MSL 3 (168 Hours) moisture sensitivity ratings and ROHS3/REACH compliance certifications, supporting equivalent reliability profiles for regulated applications.

Q: What inventory considerations apply to these parts?

A: The UPD78F0740MA-FAA-AX has 1033 units in new original stock, while the R5F10Y47ASP#30 has 11264 units available. Supply chain planning should account for these inventory levels when selecting between equivalent options.