0418A1ACLAA-50

Overview

The IBM 0418A1ACLAA-50 is a static random-access memory (SRAM) integrated circuit with a total storage capacity of 4 megabits. The device features a memory organization of 256K words by 18 bits, providing wide data paths suitable for high-performance computing applications. It utilizes HSTL (High-Speed Transceiver Logic) interface standards to ensure signal integrity at high speeds. The component operates within a supply voltage range of 3.135V to 3.465V and supports access times as fast as 4.3 nanoseconds. It is housed in a 119-ball ball grid array (BGA) package measuring 22x14 mm, designed for surface mount technology. The unit functions reliably across an ambient temperature range of 0°C to 85°C.

Feature Summary

• Provides non-volatile data retention characteristics typical of SRAM architecture for rapid read/write operations.
• Integrates HSTL interface logic to support high-speed data transmission in demanding digital systems.
• Utilizes a compact 119-ball BGA surface-mount package for efficient board space utilization.

Applications

• High-performance server memory subsystems
• Network infrastructure equipment caching
• Industrial control system data buffering

Procurement Notes

Verify the specific suffix designation against official IBM documentation to confirm exact speed grade and package variant. Ensure compatibility with existing HSTL signaling requirements on the target motherboard. Confirm that the procurement source provides genuine components with traceable manufacturing history to avoid counterfeit risks associated with legacy IBM memory parts.

Selection Notes

Select this component when a 4Mb SRAM with 18-bit width is required for high-speed data handling. The HSTL interface mandates compatible voltage levels and termination strategies on the PCB design. Engineers must account for the 119-BGA footprint during layout and ensure thermal management solutions support the specified operating temperature range for reliable long-term performance.

Part Context

This part belongs to IBM's legacy line of high-speed SRAM devices, often utilized in enterprise-grade hardware such as ThinkCentre systems or specialized server boards. These components were critical for cache memory and buffer applications before the widespread adoption of higher-density DRAM technologies. The 0418 series represents a specific generation of memory solutions optimized for the processing speeds and interface standards prevalent during its production era.

Replacement Considerations

Direct pin-to-pin replacements are limited due to proprietary IBM specifications. Verify functional equivalents from other manufacturers only if they match the 256K x 18 organization, HSTL interface, and 119-BGA package dimensions exactly. Cross-referencing with IBM-approved alternative part numbers is recommended to ensure system stability.