043641WLAD-5

Overview

The IBM 043641WLAD-5 is a static random-access memory (SRAM) integrated circuit with a total capacity of 4 Mbit. The device features a 256K x 18 bit organization, providing high-density data storage in a compact form factor. It utilizes HSTL signaling standards for reliable high-speed data transmission. The component is housed in a 119-ball Ball Grid Array (BGA) package with dimensions of 17x7 mm, designed for surface-mount assembly on printed circuit boards.

Feature Summary

• High-density 4 Mbit SRAM architecture
• HSTL interface compatibility
• Compact 119-ball BGA packaging

Applications

• Server memory subsystems
• Network infrastructure equipment
• Embedded computing systems

Procurement Notes

Verify the specific revision suffix and package marking against official IBM Microelectronics documentation to ensure authenticity. Confirm RoHS compliance status as records indicate non-compliance for this part number. Check for obsolete status and availability of qualified distributors or surplus suppliers before procurement.

Selection Notes

Select this component when a 4 Mbit capacity with 18-bit word width is required. Ensure the design supports HSTL voltage levels and timing requirements. Verify that the PCB layout accommodates the 119-ball BGA footprint and thermal dissipation needs associated with this package type.

Part Context

This SRAM belongs to IBM's legacy microelectronics portfolio, historically used in enterprise-grade hardware. The 043641 series represents a generation of high-performance memory solutions developed for demanding computing environments prior to industry consolidation.

Replacement Considerations

Consult IBM Microelectronics archives for direct cross-references. Evaluate equivalent 4Mbit x18 SRAM devices from other manufacturers if IBM supply is unavailable, ensuring pinout and electrical compatibility.