The XL is a quartz-based PLL clock oscillator family with <1000fs phase jitter. Available in a wide frequency range from 0.750MHz to 1350MHz, the XL series crystal oscillators utilize a family of proprietary ASICs, with a key focus on noise reduction technologies.

The 3rd order Delta Sigma Modulator reduces noise to the levels that are comparable to traditional Bulk Quartz and SAW oscillators. With short lead-time, low cost, low noise, wide frequency range, excellent ambient performance, the XL devices are an excellent choice over the conventional technologies. The XL (XO option) devices have stabilities as tight as ±20ppm and the XL (VCXO option) devices have ±50ppm APR. Either option provides extremely quick delivery for both standard and custom frequencies.

Choose your device by using our Custom Part Configuration Utility.


  • Frequency range: 0.750MHz to 1350MHz
  • Output Types: LVDS, LVPECL, LVCMOS
  • Phase Jitter (12kHz to 20MHz): 750fs to 890fs typical (1000fs max)
  • Supply Voltage: 2.5V or 3.3V
  • Package options:
    • 3.2 x 2.5 x 1.0 mm (not available for VCXO)
    • 5.0 x 3.2 x 1.2 mm
    • 7.0 x 5.0 x 1.3 mm
  • Frequency stability: ± 20ppm ± 25ppm, ± 50ppm, or ± 100 ppm
    • Operating temperatures: -20°C to +70°C
  • Frequency stability: ± 25ppm, ± 50ppm, or ± 100 ppm
    • Operating temperatures: -40°C to +85°C
  • Frequency stability: ± 50ppm, or ± 100 ppm
    • Operating temperatures:  -40°C to +105°C
  • kV of 85ppm/volt typical from 0.5VDC to VDD (VCXO only)
    • Better than ±10% linearity for Vc range

Product Options

This device is factory-configurable. Try the Custom Part Configuration Utility.

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
XL Family of Low Phase Noise Quartz-based PLL Oscillators Datasheet Datasheet PDF 332 KB
User Guides & Manuals
Timing Products for NXP (Freescale) i.MX 简体中文 Guide PDF 321 KB
Fox XpressO to IDT Part Number Cross Reference Guide PDF 5.65 MB
Fox XpressO to IDT Part Number Cross Reference (Spreadsheet) Guide XLS 3.38 MB
PCN# : FX1604-01 Change of MOQ for Select Packages Product Change Notice PDF 662 KB
PCN# : A1505-02 PCN for Top Mark DateCode change Product Change Notice PDF 654 KB
High-Performance Clock Oscillator Family Overview Overview PDF 407 KB
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Products for Wired Broadband Applications Application Briefs PDF 686 KB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB