72125L50TP

Overview

The IDT72125L50TP is an obsolete asynchronous FIFO memory component manufactured by Renesas Electronics Corporation. It features a storage capacity of 256 words with a 16-bit data width, organized as 256 x 16. The device supports a maximum data rate of 40MHz and has a typical access time of 50ns. It operates within a supply voltage range of 4.5V to 5.5V and draws a maximum supply current of 100mA. The unit is housed in a 28-pin Plastic Dual In-Line Package (PDIP) with a lead count of 28. The operational temperature range extends from 0°C to 70°C.

Feature Summary

• Asynchronous operation for independent read and write clock domains
• Unidirectional bus directionality for standard FIFO buffering
• Standard TTL-compatible logic levels

Applications

• Data buffering between microprocessors and peripheral devices
• Clock domain crossing interfaces in digital systems
• Temporary data storage in high-speed serial communication links

Procurement Notes

This specific part number is officially classified as obsolete and no longer in production. Verification of availability is restricted to surplus or secondary market channels only. Procurement requires confirmation of lot date codes and physical condition due to the component's discontinued status. Standard new-production sourcing is not possible through authorized distribution networks.

Selection Notes

Designers should evaluate alternative active components from the same family or newer generations that offer RoHS compliance and extended temperature ranges. The PDIP package limits suitability for automated surface-mount assembly processes. Considerations must include verifying pin compatibility and electrical specifications against modern replacement parts to ensure system integrity without redesign.

Part Context

The 72125 series belongs to Renesas' legacy line of asynchronous FIFO memories, widely utilized in industrial and consumer electronics during the early era of high-speed digital interfacing. This specific model represents a mid-density solution designed for applications requiring moderate buffer depths with simple control logic. Its discontinuation reflects the industry shift toward higher density and lower voltage standards.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.