ZL40268LDG1

Overview

The ZL40268LDG1 is a low skew, low additive jitter fanout buffer manufactured by Microchip Technology. It features eight differential outputs supporting HCSL, LVDS, and LVPECL signaling formats. The device accepts inputs from two differential/single-ended sources or a crystal oscillator, operating at frequencies up to 1.5 GHz. It delivers ultra-low additive jitter of 24 fs (12 kHz to 20 MHz integration band at 625 MHz). Powered by 2.5V or 3.3V supplies with an embedded LDO for noise rejection, it ensures maximum output-to-output skew of 50 ps. Configuration is managed via I2C bus or hardware control pins.

Feature Summary

• Ultra-low additive jitter performance of 24 fs at 625 MHz
• Supports clock frequencies from 0 Hz to 1.5 GHz
• Eight configurable differential outputs (HCSL/LVDS/LVPECL)
• Integrated crystal oscillator circuit with programmable load capacitance

Applications

• PCIe Gen1/2/3/4/5 Clock Distribution
• Wired Communications: OTN, SONET/SDH, GE, 10 GE, FC, and 10G FC
• Low-Jitter Clock Trees
• High Performance Microprocessor Clock Distribution

Procurement Notes

Verify the specific ordering suffix 'LDG1' against the manufacturer's current documentation to confirm package type and tape/reel specifications. Ensure compatibility with industrial temperature ranges (-40°C to +85°C) required for the target application environment.

Selection Notes

Select this component when ultra-low jitter (<25 fs) and high-frequency operation (up to 1.5 GHz) are critical. It is suitable for applications requiring flexible output signaling formats (HCSL, LVDS, LVPECL) and independent output enable control. Verify power supply requirements (2.5V or 3.3V) and interface preferences (I2C vs. Hardware Control) during design.

Part Context

The ZL40268 belongs to Microchip's SmartBuffer family of clock distribution devices. It is designed to replace discrete buffer solutions in high-speed digital systems, providing integrated jitter cleaning and signal restoration capabilities within a single 48-lead QFN package.

Replacement Considerations

Consult official Microchip documentation for verified pin-compatible or functionally equivalent alternatives. Do not assume cross-compatibility with other series without verifying electrical parameters and pin assignments.