ZL30241LDF1

Overview

The ZL30241LDF1 is a single-channel precision universal clock generator and numerically controlled oscillator (NCO) manufactured by Microchip Technology. It features one phase-locked loop (PLL) capable of integer, fractional, and ratio modes to support flexible forward error correction (FEC) rates. The device synthesizes two independent output frequencies ranging from 12 MHz to 914 MHz with ultra-low jitter performance. Each output buffer is individually configurable for LVDS, LVPECL, HCSL, or LVCMOS signaling formats. Configuration is managed via a high-speed SPI interface or factory-programmed defaults stored in internal fuses.

Feature Summary

• Single PLL architecture supporting integer, fractional, and ratio modes for precise frequency synthesis
• Two programmable outputs generating frequencies between 12 MHz and 914 MHz
• Ultra-low jitter performance: up to 275 fs RMS in integer mode and 400 fs RMS in fractional mode
• Flexible input options including crystals (22–54 MHz), crystal oscillators, and differential references (up to 864 MHz)
• Individually configurable output buffers supporting LVDS, LVPECL, HCSL, and LVCMOS standards

Applications

• Clocking for network processing units (NPUs) and field-programmable gate arrays (FPGAs)
• Timing for 10G CDRs, high-speed ADCs, PCIe interfaces, Ethernet switches, and PHYs
• Timing solutions for optical communications, storage systems, networking equipment, and broadcast video

Procurement Notes

Verify the ordering suffix LDF1 corresponds to the 48-pin QFN package supplied in tape and reel format. Confirm the operating temperature range meets system requirements, as this variant supports -40°C to +85°C. Ensure the design accounts for the specific pinout and power supply configurations detailed in the datasheet.

Selection Notes

Select this component when a single PLL with dual independent outputs is required for low-jitter applications. Choose the ZL30241LDF1 over the tray-packaged version if surface-mount assembly using pick-and-place machinery is preferred. Verify that the required output voltage levels and drive strengths are compatible with the available LVDS, LVPECL, HCSL, or LVCMOS modes.

Part Context

The ZL30241LDF1 belongs to the ZL30241 family of precision clock generators. The 'LDF1' suffix specifically denotes the 48-pin QFN package configuration packaged in tape and reel for automated manufacturing. This distinguishes it from the 'LDG1' variant, which utilizes the same electrical specifications but is supplied in a tray package.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, ensure compatibility with the 48-pin QFN footprint and verify that the replacement supports the required SPI programming interface and output format configurations.