Equivalent & Substitute Parts for DF2357F20IV

Part Overview

The DF2357F20IV is a 16-bit H8S/2300 microcontroller manufactured by Renesas Electronics Corporation, featuring 128KB FLASH memory and a 128-QFP package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, redesigns, and new production requirements. The part operates at 20MHz with 87 I/O pins and includes integrated peripherals such as SCI, SmartCard connectivity, DMA, PWM, and watchdog timer functionality.

Substiute Parts

DF2357F20IV

Renesas Electronics CorporationIn Stock: 2232DF2357F20IV Datasheet

Current PartRFQ

NANO100KE3BN

Nuvoton Technology CorporationIn Stock: 846NANO100KE3BN Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DF2357F20IV is determined by the following critical parameters:

• Program Memory Capacity: 128KB FLASH minimum requirement
• Package Type: 128-pin QFP-class surface mount package
• Operating Temperature Range: -40°C ~ 85°C compatibility
• Supply Voltage Compatibility: Functional overlap within specified voltage ranges
• I/O Pin Count: Minimum 86 I/O pins to maintain system connectivity
• Compliance Standards: ROHS3 compliance and equivalent regulatory status

The NANO100KE3BN qualifies as a substitute based on matching program memory size (128KB FLASH), equivalent I/O pin count (86 pins), compatible operating temperature range, and identical ROHS3 compliance status. While the NANO100KE3BN operates at a higher speed (42MHz) and uses a different core architecture (32-bit ARM Cortex-M0 versus 16-bit H8S), these represent functional enhancements rather than incompatibilities. The 128-LQFP package (14x14) differs from the original 128-BFQFP (14x20) in footprint dimensions, requiring PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

The NANO100KE3BN is available as an active product with current manufacturing support, addressing the obsolescence status of the DF2357F20IV. Both devices maintain ROHS3 compliance and equivalent moisture sensitivity ratings, ensuring regulatory and environmental consistency.

Selection of the NANO100KE3BN requires verification of:

• PCB layout compatibility with the 128-LQFP (14x14) package footprint, which differs from the original 128-BFQFP (14x20) dimensions
• Firmware compatibility, as the substitute uses a 32-bit ARM Cortex-M0 architecture versus the original 16-bit H8S/2000 core
• Supply voltage operation within the 1.8V ~ 3.6V range of the substitute, which differs from the original 4.5V ~ 5.5V specification
• Peripheral feature mapping, including differences in data converter specifications (A/D 12x12b and D/A 2x12b versus A/D 8x10b and D/A 2x8b)

Frequently Asked Questions (FAQ)

Q: Can the NANO100KE3BN directly replace the DF2357F20IV without PCB modifications?

A: No. The package footprints differ: the original uses 128-BFQFP (14x20mm), while the substitute uses 128-LQFP (14x14mm). PCB layout redesign is required.

Q: Are the supply voltage ranges compatible between these devices?

A: No. The DF2357F20IV operates at 4.5V ~ 5.5V, while the NANO100KE3BN operates at 1.8V ~ 3.6V. Power supply circuitry must be redesigned accordingly.

Q: What is the significance of the different core architectures?

A: The DF2357F20IV uses a 16-bit H8S/2000 core, while the NANO100KE3BN uses a 32-bit ARM Cortex-M0 core. Firmware must be rewritten or ported to the new architecture.

Q: Do both devices meet the same compliance standards?

A: Yes. Both devices are ROHS3 compliant with MSL rating 3 (168 Hours), ensuring equivalent environmental and regulatory compliance.

Q: Why does the NANO100KE3BN have more RAM despite identical FLASH capacity?

A: The NANO100KE3BN provides 16K x 8 RAM versus 8K x 8 in the original. This represents an enhancement in available working memory.

Q: Is the I/O pin count difference significant?

A: The NANO100KE3BN provides 86 I/O pins versus 87 in the original. System designs using all 87 pins require functional reassessment.

Q: What is the impact of the higher operating speed of the NANO100KE3BN?

A: The NANO100KE3BN operates at 42MHz versus 20MHz for the original. This provides performance headroom but requires firmware validation for timing-critical operations.