4RCD0124KC0ATG8/M

Overview

The Renesas 4RCD0124KC0ATG8/M is a JEDEC-compliant Gen 1 DDR4 Registered Clock Driver (RCD) designed for enterprise-class server memory modules. 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 DDR4-1600, 1866, 2133, and 2400 MT/s speeds. It is packaged in a 253-ball FCCSP (13.5 x 8.0 x 1.4 mm) with 0.65mm pitch. The component is marked as obsolete with an End-of-Life date of May 30, 2025.

Feature Summary

• JEDEC compliant Gen 1 DDR4 RCD for RDIMMs, LRDIMMs, and UDIMMs
• Supports CKE Power Down, Direct Dual CS, and Encoded Quad CS modes
• Optimized for 1.2V VDD operation with 32-bit 1:2 register command/address buffer
• Pinout optimized for DDR4 RDIMM, LRDIMM, and UDIMM PCB layout

Applications

• Enterprise Class Server RDIMMs
• LRDIMMs
• UDIMMs

Procurement Notes

This product is officially listed as obsolete by the manufacturer. The End-of-Life (EOL) date is recorded as May 30, 2025. Verification of current availability requires checking distributor stock or alternative packaging options such as the tape and reel variant 4RCD0124KC0ATGI8.

Selection Notes

Select this component for legacy DDR4 designs requiring a 1:2 registered clock driver. Ensure compatibility with IDT 4DB0226KA (DDR4 DB) and IDTTSE2004GB2 (Temperature Sensor). Verify that the system design accommodates the 253-ball FCCSP package dimensions and thermal requirements.

Part Context

The 4RCD0124K series was originally developed by IDT before its acquisition by Renesas Electronics Corporation. This specific part number represents a variant within the Gen 1 DDR4 RCD family, distinct from the Gen 2.5 4RCD0232K series which supports higher speeds up to 3200 MT/s.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The tape and reel version 4RCD0124KC0ATGI8 is noted as an alternative packaging option.