Renesas Electronics 7005S45J SRAM 64Kbit Parallel Memory IC

Part Overview

The Renesas Electronics 7005S45J is a 64Kbit dual-port asynchronous SRAM memory IC in 68-PLCC surface mount packaging. This part is classified as obsolete, indicating it has reached end-of-life status and is no longer in active production. Finding equivalent or substitute parts is necessary to support legacy system maintenance, board redesigns, or inventory replenishment where original stock is depleted.

Substiute Parts

7005S45J

Renesas Electronics CorporationIn Stock: 9097005S45J Datasheet

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7005L15JG

Renesas Electronics CorporationIn Stock: 11427005L15JG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7005S45J is determined by the following critical parameters:

• Memory Capacity and Organization: Must be 64Kbit with 8K x 8 organization to maintain address and data bus compatibility
• Memory Technology: Must be dual-port asynchronous SRAM to preserve functional behavior
• Package and Pinout: Must use 68-PLCC surface mount packaging with identical footprint (24.21x24.21mm)
• Electrical Interface: Must support 4.5V ~ 5.5V supply voltage range and 0°C ~ 70°C operating temperature
• Access and Cycle Time: Substitute parts with equal or faster timing specifications are functionally compatible

The 7005L15JG meets all substitution criteria. It maintains identical memory capacity, organization, technology, and packaging while providing improved access time (15 ns versus 45 ns) and write cycle time (15 ns versus 45 ns). The faster timing specification ensures backward compatibility in applications designed for the original 45 ns part.

Parameter Comparison

Engineering Selection Recommendations

The 7005L15JG is the direct substitute for the 7005S45J based on the following factors:

• Functional Compatibility: Identical memory capacity, organization, and dual-port asynchronous architecture ensure pin-for-pin and functional compatibility
• Electrical Compatibility: Both parts operate within the same 4.5V ~ 5.5V supply voltage range and 0°C ~ 70°C temperature specification
• Performance Enhancement: The 7005L15JG provides faster access and write cycle times (15 ns), which is a performance improvement over the original 45 ns specification
• Product Status: The 7005L15JG is in active production status, ensuring long-term availability and supply chain reliability
• Compliance Improvement: The 7005L15JG is ROHS3 compliant, whereas the original part is RoHS non-compliant, supporting modern manufacturing and environmental standards

Frequently Asked Questions (FAQ)

Q: Can the 7005L15JG be used as a direct replacement for the 7005S45J?

A: Yes. Both parts share identical memory capacity (64Kbit), organization (8K x 8), dual-port asynchronous architecture, 68-PLCC packaging, and electrical specifications (4.5V ~ 5.5V, 0°C ~ 70°C). The 7005L15JG provides faster timing performance, making it functionally compatible in all applications designed for the 7005S45J.

Q: What are the key differences between these parts?

A: The primary differences are access time (45 ns versus 15 ns), write cycle time (45 ns versus 15 ns), product status (obsolete versus active), and RoHS compliance (non-compliant versus ROHS3 compliant). The 7005L15JG is a performance-enhanced, actively produced alternative.

Q: Are the package dimensions identical?

A: Yes. Both parts use 68-PLCC surface mount packaging with identical dimensions of 24.21x24.21mm, ensuring compatibility with existing PCB layouts and assembly processes.

Q: What is the MSL rating, and does it differ between parts?

A: Both parts have an MSL rating of 3 with a 168-hour floor life. This rating indicates moisture sensitivity and handling requirements are identical for both components.

Q: Why is the original part classified as obsolete?

A: The 7005S45J has reached end-of-life status and is no longer manufactured by Renesas Electronics. The 7005L15JG represents the active production alternative with improved specifications.