RC28F256P30TFE Equivalent & Substitute Parts

Part Overview

The RC28F256P30TFE is a 256Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., designed for non-volatile storage applications requiring parallel interface connectivity. This component features a 64-EasyBGA (10x13) package with 52 MHz clock frequency and 100 ns access time. The part is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support, redesigns, and inventory management.

Substiute Parts

RC28F256P30TFE

Micron Technology Inc.In Stock: 4306RC28F256P30TFE Datasheet

Current PartRFQ

MT28EW256ABA1HPC-0SIT

Micron Technology Inc.In Stock: 16044MT28EW256ABA1HPC-0SIT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC28F256P30TFE is determined by the following critical parameters:

Core Compatibility Criteria:

• Memory capacity: 256Mbit (non-negotiable)
• Memory technology: FLASH - NOR (non-negotiable)
• Memory interface: Parallel (non-negotiable)
• Manufacturer: Micron Technology Inc. (same manufacturer ensures protocol and timing compatibility)
• Operating temperature range: -40°C ~ 85°C (must match or exceed)
• Moisture sensitivity level: 3 (168 Hours) (must match or be lower)

Allowable Parameter Variations:

• Package type: Different BGA variants (64-EasyBGA to 64-LBGA) are acceptable if PCB layout can accommodate dimensional differences
• Voltage supply range: Substitute may have higher voltage range (2.7V ~ 3.6V) if system design permits
• Access time and clock frequency: Substitute may have faster specifications (75 ns access time, higher clock frequency) without functional impact
• Write cycle time: Substitute may have faster specifications (60 ns) without functional impact
• Product status: Active status preferred over obsolete for long-term availability

The MT28EW256ABA1HPC-0SIT qualifies as a substitute based on matching core parameters while offering improved specifications and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Voltage Supply Range

The RC28F256P30TFE operates at 1.7V ~ 2V, while the MT28EW256ABA1HPC-0SIT requires 2.7V ~ 3.6V. This represents a fundamental difference in power supply requirements. Substitution is only viable if the system design can accommodate the higher voltage range of the MT28EW256ABA1HPC-0SIT. If the original design is constrained to 1.7V ~ 2V operation, this substitute is not electrically compatible.

Secondary Consideration: Package Footprint

The RC28F256P30TFE uses 64-EasyBGA (10x13) packaging, while the MT28EW256ABA1HPC-0SIT uses 64-LBGA (11x13) packaging. The dimensional difference (10x13 versus 11x13) requires PCB layout verification. If the original PCB footprint is designed specifically for the EasyBGA variant, physical rework or PCB redesign may be necessary.

Compliance and Availability

The MT28EW256ABA1HPC-0SIT holds active product status and ROHS3 compliance, compared to the obsolete, RoHS non-compliant status of the RC28F256P30TFE. For new designs or long-term system support, the substitute offers superior compliance posture and supply chain continuity.

Performance Characteristics

The MT28EW256ABA1HPC-0SIT provides faster access time (75 ns versus 100 ns) and faster write cycle time (60 ns versus 100 ns). These improvements present no functional conflict with systems designed for the original part's timing specifications.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW256ABA1HPC-0SIT directly replace the RC28F256P30TFE without any modifications?

A: Direct replacement depends on two factors: (1) System voltage supply must be capable of delivering 2.7V ~ 3.6V instead of 1.7V ~ 2V, and (2) PCB footprint must accommodate the 64-LBGA (11x13) package instead of 64-EasyBGA (10x13). If both conditions are met, functional replacement is viable.

Q: What is the primary difference between these two parts?

A: The primary difference is the voltage supply range. The original part operates at 1.7V ~ 2V (low voltage), while the substitute requires 2.7V ~ 3.6V (standard voltage). This is a critical design parameter that must be verified before substitution.

Q: Are there any timing compatibility issues with the faster substitute?

A: No. The MT28EW256ABA1HPC-0SIT provides faster access time (75 ns) and faster write cycle time (60 ns) compared to the original part (100 ns each). Faster components do not create timing conflicts in systems designed for slower components.

Q: What does the package designation difference mean?

A: 64-EasyBGA (10x13) and 64-LBGA (11x13) are both 64-pin ball grid array packages but with different physical dimensions. The EasyBGA variant is 10mm x 13mm, while the LBGA variant is 11mm x 13mm. PCB footprints are not interchangeable without layout modification.

Q: Is the substitute RoHS compliant?

A: Yes. The MT28EW256ABA1HPC-0SIT is ROHS3 compliant, whereas the original RC28F256P30TFE is RoHS non-compliant. This makes the substitute suitable for applications with environmental compliance requirements.

Q: What is the inventory status of these parts?

A: The RC28F256P30TFE (obsolete) has 4252 units in stock. The MT28EW256ABA1HPC-0SIT (active) has 15954 units in stock, providing significantly better long-term availability.

Q: Can I use the substitute in a 1.7V ~ 2V system?

A: No. The MT28EW256ABA1HPC-0SIT requires a minimum of 2.7V. Using it in a 1.7V ~ 2V system will result in device malfunction or failure. System voltage supply must be redesigned or upgraded to support the substitute.