R5F1027ADNA#U5 Equivalent & Substitute Parts

Part Overview

The R5F1027ADNA#U5 is a 16-bit RL78/G12 microcontroller manufactured by Renesas Electronics Corporation. This embedded IC features 16KB FLASH program memory, 2KB EEPROM, and 1.5KB RAM in a 24-HWQFN (4x4) surface mount package. The device integrates a 24MHz RL78 core processor with comprehensive connectivity options including CSI, I2C, and UART/USART interfaces, along with peripherals such as DMA, LVD, POR, PWM, and WDT.

The R5F1027ADNA#U5 carries an Obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this microcontroller architecture.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Series	RL78/G12
Core Processor	RL78
Core Size	16-Bit
Speed	24MHz
Program Memory Size	16KB (16K x 8)
Program Memory Type	FLASH
EEPROM Size	2K x 8
RAM Size	1.5K x 8
Voltage Supply (Vcc/Vdd)	1.8V ~ 5.5V
Data Converters	A/D 11x8/10b
Number of I/O	18
Connectivity	CSI, I2C, UART/USART
Peripherals	DMA, LVD, POR, PWM, WDT
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	24-WFQFN Exposed Pad
Supplier Device Package	24-HWQFN (4x4)
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the R5F1027ADNA#U5 is determined by strict equivalence across the following critical parameters:

Core Electrical Parameters:

RL78/G12 series architecture
16-bit core processor
24MHz operating speed
16KB FLASH program memory
2KB EEPROM
1.5KB RAM
1.8V ~ 5.5V supply voltage range
A/D 11x8/10b data converter configuration
18 I/O pins
CSI, I2C, UART/USART connectivity
DMA, LVD, POR, PWM, WDT peripherals

Mechanical Parameters:

24-HWQFN (4x4) package
24-WFQFN Exposed Pad case
Surface mount mounting type
MSL 3 (168 Hours) moisture sensitivity

Compliance Parameters:

REACH Unaffected status
RoHS3 Compliance (for active parts)

Substitute parts maintain identical electrical and mechanical specifications. Variations in product status (Obsolete vs. Active), operating temperature range, packaging format (tray), and regulatory classifications do not affect functional substitutability within the specified parameter set.

Parameter Comparison

Parameter	R5F1027ADNA#U5	R5F1027AGNA#25	R5F1027AGNA#05	R5F1027AANA#05	R5F1027AANA#25
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation	Renesas Electronics Corporation	Renesas Electronics Corporation	Renesas Electronics Corporation
Series	RL78/G12	RL78/G12	RL78/G12	RL78/G12	RL78/G12
Core Processor	RL78	RL78	RL78	RL78	RL78
Core Size	16-Bit	16-Bit	16-Bit	16-Bit	16-Bit
Speed	24MHz	24MHz	24MHz	24MHz	24MHz
Program Memory Size	16KB (16K x 8)	16KB (16K x 8)	16KB (16K x 8)	16KB (16K x 8)	16KB (16K x 8)
Program Memory Type	FLASH	FLASH	FLASH	FLASH	FLASH
EEPROM Size	2K x 8	2K x 8	2K x 8	2K x 8	2K x 8
RAM Size	1.5K x 8	1.5K x 8	1.5K x 8	1.5K x 8	1.5K x 8
Voltage Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V
Data Converters	A/D 11x8/10b	A/D 11x8/10b	A/D 11x8/10b	A/D 11x8/10b	A/D 11x8/10b
Number of I/O	18	18	18	18	18
Connectivity	CSI, I2C, UART/USART	CSI, I2C, UART/USART	CSI, I2C, UART/USART	CSI, I2C, UART/USART	CSI, I2C, UART/USART
Peripherals	DMA, LVD, POR, PWM, WDT	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	Internal
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	24-WFQFN Exposed Pad	24-WFQFN Exposed Pad	24-WFQFN Exposed Pad	24-WFQFN Exposed Pad	24-WFQFN Exposed Pad
Supplier Device Package	24-HWQFN (4x4)	24-HWQFN (4x4)	24-HWQFN (4x4)	24-HWQFN (4x4)	24-HWQFN (4x4)
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active	Active	Active	Active
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 105°C (TA)	-40°C ~ 105°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All four substitute parts (R5F1027AGNA#25, R5F1027AGNA#05, R5F1027AANA#05, and R5F1027AANA#25) are functionally equivalent to the R5F1027ADNA#U5 across all critical electrical and mechanical parameters. The following factors apply to component selection:

Product Status Consideration: The R5F1027ADNA#U5 is classified as Obsolete. All substitute parts carry Active product status, ensuring ongoing availability and manufacturer support. Selection of an Active part eliminates supply chain risk associated with discontinued components.

Compliance and Regulatory Status: All substitute parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic components. The main part does not specify RoHS compliance status.

Operating Temperature Range: R5F1027AGNA#25 and R5F1027AGNA#05 support an extended operating temperature range of -40°C to 105°C, compared to -40°C to 85°C for the main part and R5F1027AANA series. Selection of the AGNA variants provides additional thermal margin for applications requiring higher temperature operation.

Packaging Format: All substitute parts are supplied in Tray packaging format. The main part packaging format is not specified. Tray packaging is standard for production quantities and automated assembly processes.

Inventory Availability: Current stock levels are: R5F1027AGNA#25 (1888 pcs), R5F1027AGNA#05 (635 pcs), R5F1027AANA#05 (1059 pcs), and R5F1027AANA#25 (2431 pcs). Selection should account for project timeline and volume requirements.

Frequently Asked Questions (FAQ)

Q: Can R5F1027AGNA#25 be used as a direct replacement for R5F1027ADNA#U5?

A: Yes. R5F1027AGNA#25 is a direct functional equivalent. Both devices share identical core processor architecture, memory configuration, I/O count, connectivity interfaces, and peripheral set. The 24-HWQFN (4x4) package and electrical specifications are identical. The primary difference is product status: R5F1027AGNA#25 is Active while R5F1027ADNA#U5 is Obsolete.

Q: What is the difference between R5F1027AGNA and R5F1027AANA variants?

A: The primary difference is operating temperature range. R5F1027AGNA variants support -40°C to 105°C, while R5F1027AANA variants support -40°C to 85°C. All other electrical and mechanical parameters are identical. Selection depends on application temperature requirements.

Q: What do the suffixes #25 and #05 indicate?

A: The suffixes #25 and #05 represent different packaging or tape/reel configurations within the same part family. Both configurations are functionally equivalent and support identical electrical specifications. Selection is based on procurement and assembly process requirements.

Q: Are all substitute parts pin-compatible with the original R5F1027ADNA#U5?

A: Yes. All substitute parts use the identical 24-HWQFN (4x4) package with 24-WFQFN Exposed Pad configuration. Pin count, pin assignment, and mechanical dimensions are identical across all parts.

Q: Is firmware or software modification required when switching to a substitute part?

A: No. All substitute parts implement the identical RL78/G12 core processor architecture with identical memory organization, peripheral configuration, and instruction set. Existing firmware and software require no modification.

Q: What is the significance of ROHS3 Compliance on the substitute parts?

A: ROHS3 Compliance indicates the parts meet current Restriction of Hazardous Substances regulations. This certification is required for components used in many markets and applications. The main part does not specify RoHS compliance status.

Q: Can substitute parts be mixed within a single production run?

A: Yes. All substitute parts are functionally equivalent and interchangeable. However, standard manufacturing practice typically specifies a single part number per production run to maintain traceability and consistency.

Q: What is the Moisture Sensitivity Level (MSL) and why is it important?

A: MSL 3 (168 Hours) indicates the component can be exposed to ambient conditions (30°C, 85% relative humidity) for up to 168 hours before soldering without risk of moisture-induced failure. All parts share this specification. Proper storage and handling procedures must be followed to maintain this rating.

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