9ZXL1231EKILFT

Overview

The 9ZXL1231EKILFT is a second-generation DB1200ZL differential clock buffer manufactured by Renesas Electronics. It features a 1:12 input-to-output ratio with differential HCSL inputs and LP-HCSL outputs, supporting frequencies from 1 MHz to 400 MHz. The device operates within a supply voltage range of 3.135 V to 3.465 V and functions across an industrial temperature range of -40°C to +85°C. Packaged in a 64-VFQFPN (9x9 mm) surface-mount housing, it integrates a PLL for zero-delay buffering applications.

Feature Summary

• Supports PCIe Gen 1–5 compliance with LP-HCSL outputs to eliminate external termination resistors
• Features 12 independent output enable pins for hardware-controlled signal management
• Includes selectable PLL bandwidth to minimize jitter peaking in cascaded topologies
• Compatible with spread spectrum inputs for EMI reduction

Applications

• Servers and high-performance computing systems
• NVMe storage controllers
• Networking accelerators
• Industrial control equipment

Procurement Notes

Verify the specific suffix EKILFT against official Renesas documentation to confirm package type and tape-and-reel configuration. Confirm moisture sensitivity level (MSL 3) and reflow soldering profile requirements prior to assembly. Check current product status as availability may vary by region.

Selection Notes

Select this component for designs requiring low-power HCSL signaling with up to 12 outputs. Ensure the design supports the required 3.3 V nominal supply voltage. Consider the 64-pin VFQFPN footprint constraints during PCB layout. Verify SMBus addressability needs if multiple devices share the same bus segment.

Part Context

This part belongs to the 9ZXL1231 series, representing an enhanced performance upgrade over the 9ZXL1231A model. It offers improved phase jitter performance and increased system security features while maintaining pin compatibility with previous generations for critical QPI/UPI applications.

Replacement Considerations

The 9ZXL1231AKILFT is identified as a similar alternative within the same family. Verify functional equivalence regarding jitter specifications and output drive strength before substitution.