9ZXL1950BKLFT

Overview

The Renesas 9ZXL1950BKLFT is a clock buffer featuring 19 low-power HCSL (LP-HCSL) outputs and one differential HCSL input. It operates within a frequency range of 1 MHz to 400 MHz, with typical power consumption of 712 mW at a 3.3 V supply. The device utilizes a 72-pin VFQFPN package measuring 10 mm x 10 mm. It supports spread spectrum inputs for EMI reduction and includes SMBus control for output enablement and PLL bandwidth selection.

Feature Summary

• 19 LP-HCSL outputs with 85Ω output impedance, eliminating external termination resistors
• PCIe Gen 1–5 compliance with selectable PLL bandwidth to minimize jitter peaking
• SMBus interface allowing software control of individual outputs and nine selectable addresses
• Spread spectrum compatible functionality that tracks the input clock for EMI reduction

Applications

• PCI Express clock distribution for Gen 1 through Gen 5 interfaces
• Quad Peripheral Interface (QPI) and Ultra Peripheral Interface (UPI) clock buffering
• Zero-delay fanout buffering in high-performance computing systems

Procurement Notes

Verify the suffix 'KLFT' against the manufacturer's datasheet to confirm specific packaging details such as reel size and tape dimensions. Confirm moisture sensitivity level (MSL) ratings prior to surface mount assembly. Ensure the ordering quantity aligns with the factory pack quantity requirements specified by Renesas Electronics.

Selection Notes

Select this component when a pin-compatible upgrade from the 9ZXL1950B series is required with improved phase jitter performance. The fixed external feedback configuration makes it suitable for critical QPI/UPI applications requiring low drift. Verify that the 10mm x 10mm VFQFPN package footprint fits the target PCB layout constraints.

Part Context

The 9ZXL1950BKLFT belongs to the second-generation 9ZXL1950D family of enhanced-performance differential buffers. It serves as a derivative of the DB1900Z architecture, offering superior jitter characteristics compared to previous generations while maintaining compatibility with standard PCIe and processor clocking topologies.

Replacement Considerations

The 9ZXL1950DKILF is a confirmed active substitute within the same family, offering identical functional specifications and pin-out compatibility.