LMKDB1102REYR

Overview

The LMKDB1102REYR is a PCIe clock buffer manufactured by Texas Instruments, housed in a 20-pin VFQFN package. It provides one differential input and two LP-HCSL differential outputs with selectable 85Ω or 100Ω output impedance. The device supports frequencies up to 400MHz and operates on dual power supplies of 1.71V–1.89V and 2.97V–3.6V. Key features include fail-safe inputs, individual output enable pins, and loss-of-signal detection.

Feature Summary

• LP-HCSL Clock Buffer: Supports PCIe Gen 1 to Gen 7 architectures (CC and IR).
• Selectable Output Impedance: Configurable between 85Ω and 100Ω via the ZOUT_SEL pin.
• Fail-Safe Inputs: All inputs are fail-safe to ensure safe states during signal loss.
• Flexible Control: Features individual output enables, LOS detection, and automatic output disable.

Applications

• High Performance Computing systems
• Server Motherboards
• NIC/SmartNIC designs
• Hardware Accelerators

Procurement Notes

Verify the specific ordering suffix 'R' against the manufacturer's current documentation to confirm tape-and-reel packaging details. Ensure the selected package variant matches the required PCB footprint for the 20-VFQFN form factor.

Selection Notes

Select this component for applications requiring low-jitter buffering for PCIe interfaces. Confirm that the system requires only two outputs; if more channels are needed, consider the LMKDB1204 or LMKDB1208 variants from the same family.

Part Context

This part belongs to the LMKDB1xxx family of ultra-low jitter clock buffers. It shares functional similarities with the LMKDB1202 but differs in configuration options and pinout compatibility within the broader LMKDB series designed for high-speed serial link clocking.

Replacement Considerations

LMKDB1202REY: Pin-compatible alternative with potentially different feature sets or availability status. Verify electrical specifications and pin assignments before substitution.