LC5256MB-75FN256C Equivalent & Substitute Parts

Part Overview

The LC5256MB-75FN256C is a Complex Programmable Logic Device (CPLD) from Lattice Semiconductor Corporation's ispXPLD® 5000MB series. This device integrates 256 macrocells with a maximum propagation delay of 7.5 ns in a 256-pin BGA package. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, redesigns, and production continuity.

Substiute Parts

LC5256MB-75FN256C

Lattice Semiconductor CorporationIn Stock: 1120LC5256MB-75FN256C Datasheet

Current PartRFQ

LCMXO2-1200UHC-4FTG256I

Lattice Semiconductor CorporationIn Stock: 5960LCMXO2-1200UHC-4FTG256I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LCMXO2-1200UHC-4FTG256I qualifies as a substitute based on the following critical parameters:

Package Compatibility: Both devices utilize a 256-pin BGA package in 17x17 form factor, ensuring mechanical and electrical pin compatibility on PCB layouts.

Programmable Architecture: Both devices support in-system programmability, maintaining design flexibility and field reconfiguration capability.

I/O Capability: The substitute provides 206 I/O pins, exceeding the original device's 141 I/O count, ensuring all original signal connections can be accommodated.

Surface Mount Technology: Both devices employ surface mount packaging, compatible with standard PCB assembly processes.

Voltage Supply Range: The substitute operates at 2.375V ~ 3.465V, which encompasses the original device's 2.3V ~ 2.7V range, allowing operation within the original supply specifications.

Moisture Sensitivity: Both devices share MSL 3 classification (168 Hours), maintaining equivalent handling and storage requirements.

Product Status Transition: The substitute is classified as Active, providing long-term availability and manufacturing support compared to the obsolete original device.

Parameter Comparison

Engineering Selection Recommendations

Obsolescence Mitigation: The LC5256MB-75FN256C is classified as obsolete. The LCMXO2-1200UHC-4FTG256I is an active product from the same manufacturer, ensuring continued availability, manufacturing support, and technical documentation.

Compliance Status: The substitute is ROHS3 compliant, meeting current environmental and regulatory requirements. Both devices maintain REACH Unaffected status and share identical HTSUS classification (8542.39.0001).

Inventory Availability: The substitute maintains significantly higher inventory levels (5918 units) compared to the original device (1071 units), supporting production continuity and supply chain reliability.

Regulatory Alignment: Both devices are classified under identical HTSUS codes and maintain equivalent REACH compliance status, ensuring consistent regulatory treatment in procurement and export scenarios.

Frequently Asked Questions (FAQ)

Q: Can the LCMXO2-1200UHC-4FTG256I directly replace the LC5256MB-75FN256C on existing PCBs?

A: Yes. Both devices use identical 256-pin BGA packages in 17x17 form factor. Pin-to-pin compatibility is maintained for all signal connections. The substitute's 206 I/O pins accommodate all 141 original I/O requirements.

Q: What are the key differences between these devices?

A: The original is a CPLD with 256 macrocells; the substitute is an FPGA with 1280 logic elements. The substitute offers extended operating temperature range (-40°C to 100°C versus 0°C to 90°C) and expanded voltage supply range (2.375V ~ 3.465V versus 2.3V ~ 2.7V). Both support in-system programmability and share identical package form factors and moisture sensitivity classifications.

Q: Does the substitute meet the original device's voltage specifications?

A: The substitute's voltage supply range (2.375V ~ 3.465V) overlaps with and exceeds the original device's range (2.3V ~ 2.7V). Systems designed for the original device's voltage specifications will operate within the substitute's supported range.

Q: Are there any compliance or certification differences?

A: The substitute is ROHS3 compliant. Both devices maintain REACH Unaffected status and identical HTSUS classification. The substitute's active product status ensures ongoing compliance with current regulatory standards.

Q: What is the impact of the extended operating temperature range?

A: The substitute supports -40°C to 100°C (TJ) versus the original's 0°C to 90°C (TJ). This provides broader environmental operating capability, particularly for extended temperature applications. Systems designed for the original temperature range will operate within the substitute's specifications.

Q: How does the increased logic capacity affect system design?

A: The substitute provides 1280 logic elements versus the original's 256 macrocells, offering significantly greater design flexibility. Existing designs will operate within the substitute's capacity. Additional logic resources enable design enhancements or integration of additional functions without package constraints.

Q: Are programming and configuration methods compatible?

A: Both devices support in-system programmability. Configuration methods and programming interfaces are manufacturer-defined for each device series. Design teams must verify programming tool compatibility with the MachXO2 series during implementation.