043641QLAD-4

Overview

The IBM 043641QLAD-4 is a static random-access memory (SRAM) integrated circuit with a total storage capacity of 4 megabits. It features an HSTL interface designed for high-speed data transfer operations. The device utilizes a 256K by 18 memory organization structure and operates on a 3.3-volt supply voltage. It is manufactured using surface mount technology, packaged in a 119-ball BGA configuration measuring 17x7 millimeters.

Feature Summary

• HSTL interface for high-speed data transfer
• Surface mount packaging for board integration

Applications

• Enterprise server memory systems
• IBM Z mainframe infrastructure components
• High-performance computing hardware

Procurement Notes

Verify the specific memory organization against official documentation, as sources indicate variations between 256K x 18 and 128K x 36 configurations. Confirm RoHS compliance status, as some records list it as non-compliant while others do not specify. Ensure the 119-BGA package dimensions match your design requirements before procurement.

Selection Notes

Select this component when a 4-megabit SRAM solution with HSTL compatibility is required for legacy or specialized IBM hardware architectures. Consider the 3.3V operating voltage and surface-mount form factor during PCB layout planning to ensure proper signal integrity and physical fit within the target system enclosure.

Part Context

This SRAM chip serves as a critical memory component within IBM's enterprise-grade computing platforms, including the IBM Z series mainframes. These systems rely on high-reliability memory solutions to support complex transaction processing and virtualization workloads. The part supports the stringent performance and stability standards required for mission-critical business applications running on IBM infrastructure.

Replacement Considerations

The IBM 043641QLAD-5 is a documented substitute variant within the same product family. Verify electrical and pinout compatibility before replacement.