N08L63W2AB27I Equivalent & Substitute Parts

Part Overview

The N08L63W2AB27I is a 4Mbit asynchronous SRAM manufactured by onsemi, featuring parallel interface architecture with 256K x 16 memory organization in a 48-BGA package. This component is classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing system support and new design implementations. The part operates across a 2.3V to 3.6V supply range with 70 ns access time and is suitable for applications requiring volatile memory with parallel data access.

Substiute Parts

N08L63W2AB27I

onsemiIn Stock: 1009N08L63W2AB27I Datasheet

Current PartRFQ

IS62WV51216BLL-55BLI

ISSI, Integrated Silicon Solution IncIn Stock: 18546IS62WV51216BLL-55BLI Datasheet

SimilarRFQ

IS62WV51216BLL-55BLI-TR

ISSI, Integrated Silicon Solution IncIn Stock: 2324IS62WV51216BLL-55BLI-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the N08L63W2AB27I is determined by the following critical parameters:

Memory Interface Compatibility: Both substitute parts maintain parallel interface architecture, ensuring signal protocol compatibility with existing designs.

Memory Organization: The substitute parts feature 512K x 16 organization (8Mbit total), providing increased capacity while maintaining the same 16-bit word width. This organization is backward compatible for applications not requiring the full 4Mbit address space.

Voltage Supply Range: Substitute parts operate within 2.5V ~ 3.6V, overlapping the upper range of the original part (2.3V ~ 3.6V). The 0.2V minimum voltage difference is acceptable for systems designed to the original 2.3V lower limit only if supply regulation ensures operation above 2.5V.

Access Time and Performance: Substitute parts provide 55 ns access time, exceeding the original 70 ns specification. Faster access time is functionally compatible with designs specified for 70 ns operation.

Package Footprint: Substitute parts use 48-miniBGA (7.2x8.7) versus the original 48-LFBGA (6x8). Both are 48-pin BGA packages with compatible pinout, though physical dimensions differ slightly.

Operating Temperature: Identical -40°C ~ 85°C range ensures thermal compatibility.

Product Status: Substitute parts are classified as Active, providing long-term availability and supply continuity.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The N08L63W2AB27I is obsolete, making the IS62WV51216BLL series the only viable path for continued supply. Both IS62WV51216BLL-55BLI and IS62WV51216BLL-55BLI-TR variants are Active products from ISSI, ensuring long-term availability.

Compliance and Certification: The substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements. Both parts share identical ECCN and HTSUS classifications with the original component, maintaining export and trade compliance.

Packaging Selection: IS62WV51216BLL-55BLI (Tray packaging) is suitable for prototype development and low-volume applications. IS62WV51216BLL-55BLI-TR (Tape & Reel packaging) is optimized for high-volume production and automated assembly processes.

Performance Headroom: The 55 ns access time of substitute parts provides 15 ns performance improvement over the original 70 ns specification, offering design margin for timing-critical applications.

Frequently Asked Questions (FAQ)

Q: Can IS62WV51216BLL parts directly replace N08L63W2AB27I in existing designs?

A: Yes, with package footprint verification. Both substitute parts maintain identical pinout and parallel interface protocol. The 48-miniBGA package dimensions (7.2x8.7) differ slightly from the original 48-LFBGA (6x8), requiring PCB layout confirmation. Memory organization differences (512K x 16 versus 256K x 16) are transparent to designs not utilizing the full address space.

Q: What is the voltage supply compatibility concern?

A: The substitute parts specify 2.5V minimum supply voltage versus 2.3V for the original part. Systems designed to operate at 2.3V to 2.4V require supply voltage adjustment or alternative components. Systems operating at 2.5V or higher are fully compatible.

Q: How do access time differences affect system design?

A: The 55 ns access time of substitute parts is faster than the original 70 ns specification. Designs specified for 70 ns operation are fully compatible. No timing adjustments are required; the faster access time provides additional design margin.

Q: What is the difference between IS62WV51216BLL-55BLI and IS62WV51216BLL-55BLI-TR?

A: Both parts are electrically and functionally identical. The difference is packaging format: IS62WV51216BLL-55BLI uses Tray packaging for manual handling and low-volume applications, while IS62WV51216BLL-55BLI-TR uses Tape & Reel packaging for automated pick-and-place assembly and production environments.

Q: Are there address space implications when using 8Mbit parts in place of 4Mbit?

A: The substitute parts provide double the memory capacity (8Mbit versus 4Mbit) with identical 16-bit word width. Designs utilizing only the lower 256K address space operate identically. Designs requiring full 512K address space benefit from increased capacity without modification.

Q: What moisture handling precautions apply to substitute parts?

A: Both substitute parts carry MSL 3 rating (168 hours), identical to the original component. Standard moisture control procedures for BGA components apply: maintain storage in dry conditions, use desiccant packaging, and follow reflow guidelines within the 168-hour window after package opening.