4RCD0229KB1ATG/M

Overview

The Renesas 4RCD0229KB1ATG is a JEDEC-compliant Gen 2 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. Optimized for DDR4-2667 MT/s, it supports CKE power-down modes and various chip select operations including direct and encoded quad CS. The device is housed in a 253-ball FCCSP package with dual-pitch leads.

Feature Summary

• JEDEC-compliant Gen 2 DDR4 RCD optimized for 1.2V operation
• Supports DDR4-1600/1866/2133/2400/2667 speeds
• Features 32-bit 1:2 register command/address buffer with parity
• Compatible with 4DB0226KB data buffers and TSE2004GB2 temperature sensors

Applications

• Enterprise Class Server RDIMMs
• LRDIMMs
• UDIMMs

Procurement Notes

This component is officially listed as End-of-Life (EOL). A Last Time Buy notification was issued on October 11, 2024. Verification of current stock availability through authorized distributors is required before procurement planning.

Selection Notes

Select this part for Gen 2 DDR4 memory systems requiring a 1:2 clock distribution ratio. Ensure compatibility with the paired 4DB0226KB data buffer. Verify that the system design accommodates the 253-ball FCCSP package dimensions and moisture sensitivity level requirements.

Part Context

The 4RCD0229K belongs to the 4RCD0229 series of DDR4 registered clock drivers. It serves as a predecessor or alternative to later generation devices like the 4RCD0232K, which supports higher speeds up to 3200 MT/s. Both share similar packaging and functional architectures for DDR4 memory control.

Replacement Considerations

The 4RCD0232K is a documented compatible substitute offering support for DDR4 speeds up to 3200 MT/s. Designers should verify pinout compatibility and ensure the new part meets the specific timing requirements of the target memory modules.