72255LA20PF8

Overview

The 72255LA20PF8 is a synchronous FIFO memory device manufactured by Renesas Electronics Corporation. It features an organization of 8K x 18 bits, providing a total storage capacity of 144 Kbits. The component supports data rates up to 50 MHz with an access time of 12 ns. It operates on a single 5.0 V power supply and utilizes a uni-directional bus architecture. The device is housed in a 64-TQFP (14x14) surface-mount package. Key functional attributes include programmable flags, FWFT support, and relay capability. This product is currently obsolete.

Feature Summary

• Synchronous first-in-first-out memory architecture for high-speed data buffering
• Uni-directional data bus interface supporting 18-bit word width
• Programmable status flags for full, empty, and threshold detection
• First-word-fall-through functionality for rapid data retrieval

Applications

• High-speed data buffering in telecommunications equipment
• Interface bridging between asynchronous logic systems
• Data acquisition systems requiring precise timing control
• Network switching applications with burst data handling

Procurement Notes

This component is officially discontinued and no longer manufactured by Renesas Electronics. Availability is restricted to existing stock or third-party distributors. Verify RoHS compliance status carefully, as legacy parts may not meet current environmental standards. Confirm moisture sensitivity level handling requirements during procurement and storage to prevent package damage before assembly.

Selection Notes

Engineers should evaluate alternative modern synchronous FIFOs due to the obsolete status of this part. Consider devices with similar 8K x 18 organization and 50 MHz performance if pin compatibility is required. Review voltage level compatibility, as this part specifies a 5.0 V supply. Assess lead times from secondary markets if replacement sourcing is necessary for maintenance projects.

Part Context

The 72255LA20PF8 belongs to the 72255 series of SuperSync FIFOs. It is designed for applications requiring reliable, high-throughput data storage with deterministic latency. The TQFP-64 package allows for compact PCB integration. Related variants in the family may offer different speeds or voltages, but this specific suffix denotes the 5.0 V, 12 ns access time configuration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the product is obsolete, engineers must identify cross-compatible components based on electrical specifications and pinout compatibility rather than direct manufacturer substitution lists.