ZL40272LDF1

Overview

The ZL40272 is a low-skew, low additive jitter fanout buffer featuring twelve differential outputs and three inputs. It supports HCSL, LVDS, and LVPECL signaling formats with individual output enable control. The device accepts differential or single-ended inputs via a 3-to-1 multiplexer and includes an embedded crystal oscillator circuit. Operating frequencies range from 0 Hz to 1.5 GHz with supply voltages of 2.5V or 3.3V. Additive jitter is specified at 24 fs (12 kHz to 20 MHz) at 625 MHz. Control is managed via I2C bus or hardware pins within a 56-lead QFN package.

Feature Summary

• Ultra-low additive jitter of 24 fs (12 kHz to 20 MHz integration band at 625 MHz)
• Twelve differential outputs supporting HCSL, LVDS, and LVPECL formats
• 3-to-1 input multiplexer accepting differential, single-ended, or crystal inputs
• Embedded LDO voltage regulator for superior power supply noise rejection

Applications

• PCIe Gen1 through Gen7 clock distribution
• Wired communications including OTN, SONET/SDH, and 10G FC
• Low jitter clock trees and general purpose clock distribution
• Logic translation and clock/data signal restoration

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product identification system. Confirm that the component matches the DS20006408D datasheet revision. Ensure the package type corresponds to the 56-lead 8 mm x 8 mm QFN specification. Check for any applicable errata sheets regarding operational differences.

Selection Notes

Select this component when ultra-low jitter performance is critical for high-speed serial links. Ensure the design accommodates the 56-lead QFN footprint and thermal requirements. Verify compatibility with the required output signaling format (HCSL, LVDS, or LVPECL) and supply voltage (2.5V or 3.3V). Consider the I2C or hardware control interface based on system architecture constraints.

Part Context

The ZL40272 belongs to Microchip's SmartBuffer family of programmable clock buffers. It is designed for high-performance applications requiring precise clock distribution with minimal signal degradation. The device integrates multiple functions into a single chip, reducing board space and complexity compared to discrete solutions.

Replacement Considerations

Consult the official Microchip cross-reference documentation for verified substitute part numbers. Do not assume functional equivalence with other models in the series without verifying pinout and electrical specifications.