4RCD0124KC0ATG

Overview

The Renesas 4RCD0124KC0ATG is a JEDEC-compliant Gen 1 DDR4 Registered Clock Driver (RCD) designed for enterprise-class server RDIMMs, LRDIMMs, and UDIMMs. It operates with a 1.2V VDD supply and features a 32-bit 1:2 register command and address buffer with parity. The device supports DDR4 speeds of 1600, 1866, 2133, and 2400 MT/s. It is housed in a 253-ball FCCSP package with dimensions of 13.5 x 8.0 x 1.4 mm and a 0.65 mm pitch.

Feature Summary

• JEDEC-compliant Gen 1 DDR4 RCD optimized for 1.2V operation
• Supports DDR4-1600/1866/2133/2400 data rates
• Features 32-bit 1:2 register command and address buffer with parity
• Available in 253-ball FCCSP (13.5x8.0x1.4mm) package

Applications

• Enterprise Class Server RDIMMs
• LRDIMMs
• UDIMMs

Procurement Notes

This component is marked as End-of-Life (EOL) with an expiration date of May 30, 2025. Verification of final purchase availability and alternative packaging options, such as the tape and reel variant 4RCD0124KC0ATGI8, is required before procurement planning.

Selection Notes

Select this part for Gen 1 DDR4 applications requiring a 1:2 clock driver. Ensure compatibility with IDT 4DB0226KA data buffers and TSE2004GB2 temperature sensors. Verify that the system design accommodates the 253-ball FCCSP footprint and 1.2V power domain constraints.

Part Context

The 4RCD0124K series belongs to IDT's portfolio of DDR4 memory interface solutions, now managed by Renesas Electronics following the acquisition. This specific model represents the first generation of registered clock drivers compliant with early DDR4 standards, preceding higher-speed Gen 2 and Gen 2.5 variants.

Replacement Considerations

Public confirmed substitute part numbers include 4RCD0124KC0ATGI8 (Tape & Reel packaging). Higher-generation alternatives such as the 4RCD0229K (Gen 2) or 4RCD0232K (Gen 2.5) may offer backward compatibility but require verification of pinout and feature alignment.