7203L50J

Overview

The Renesas Electronics Corporation 7203L50J is a discontinued asynchronous FIFO memory device featuring an organization of 2K x 9 bits, providing a total storage capacity of 18 Kbits. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum data rate of 15 MHz with a typical access time of 50 ns. The component utilizes a unidirectional bus architecture and is housed in a 32-PLCC (32-LCC J-Lead) surface-mount package. Designed for industrial logic applications, it functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Asynchronous operation enabling independent read and write clock domains for flexible data buffering
• Unidirectional data flow architecture suitable for standard buffer applications
• CMOS technology ensuring compatibility with TTL-level I/O interfaces

Applications

• Data buffering between microprocessors and peripheral devices
• Interface bridging between systems operating at different clock speeds
• Temporary data storage in high-speed digital signal processing chains

Procurement Notes

This component is officially discontinued and no longer manufactured by Renesas Electronics. Verification of authenticity is critical when sourcing from secondary markets, as availability is limited to existing stock or surplus inventory. Buyers must confirm the specific revision level and physical condition of the units, as RoHS compliance status may vary depending on the original manufacturing date and lot code.

Selection Notes

Engineers replacing this part should evaluate modern asynchronous FIFO alternatives that offer similar depth and width specifications. Key selection criteria include verifying pin compatibility with the 32-PLCC footprint and ensuring the replacement supports the required 50 ns access time and 15 MHz throughput. Compatibility with the existing 4.5 V to 5.5 V power supply rails and unidirectional data direction requirements must be confirmed before integration.

Part Context

The 7203L50J belongs to the Renesas 7200 series of asynchronous FIFO memories, which were widely used in legacy computer and telecommunications equipment. This specific model represents the 50 ns speed grade variant within the 2K x 9 organization family. The series was designed to provide reliable data synchronization in complex digital systems before the widespread adoption of faster synchronous memory technologies.

Replacement Considerations

Publicly documented upgrade substitutes include the 7203L12JG and 7203L12JG8. These newer variants offer significantly faster performance while maintaining functional compatibility with the original design parameters.