Clocks & Timing

Renesas' programmable crystal oscillators (XOs) are designed for the ultimate flexibility, short lead time, and minimizing non-recurring engineering effort. Our XO families offer low jitter clock sources, featuring typical RMS phase jitter down to 120fs, programmable frequency up to 2.1GHz, and support different levels of performance, output types, stabilities, input voltages, packages, pin configurations, and temperature grades.

Renesas's crystal oscillators are offered in various frequencies, levels of performance, output types, stability, input voltage, package, pin configuration, and temperature grade. Use the form below to configure a device to meet your specific needs.

Submit by Part Number

Users who wish to submit a request and generate a datasheet addendum based on a part number, may do so here. The part number must be a valid and already existing part number. If the part number being requested does not yet exist, then users will need to fill out the General Configuration Form in order to create it. An entry here will override the selections in the General Configuration. Leave this field blank to use the selections.

OR: General Configuration & New Frequency Request

Jitter (typical) Typical jitter performance, integrated over the 12 kHz to 20 MHz range.

Package Device package defined by nominal width and length dimensions.

OE Position Determines the physical position of the output Enable/Disable (E/D) pin.

Voltage Power supply voltage for the crystal oscillator.

Fsel Frequency (Mhz) Output Type
Configuration 1 Low
Frequency (MHz)
Group 1
Group 2
Group 3
Group 4
Group 5
The output signal type.
Configuration 2 Float
Frequency (MHz)
Group 1
Group 2
Group 3
Group 4
Group 5
The output signal type.
Configuration 3 High
Frequency (MHz)
Group 1
Group 2
Group 3
Group 4
Group 5
The output signal type.

Freq (MHz) The fixed output frequency in MHz.

Min:0.016
Max:1500

Output Type The output signal type.

Stability Total stability of the device, expressed in parts-per-million.

Temperature Determines the temperature grade of the device.

Reset Configuration

ProXO Field Programmable Clock Oscillators

The Renesas ProXO series, including the XT/XP/XF families of devices, are designed for data centers, optical and wireline communication networks, and industrial level equipment that demand very low noise, stable, and accurate clock sources. Typical phase jitter is 120fs over 12kHz to 20MHz bandwidth. The devices are available in a wide frequency range from 15MHz to 2100MHz with package sizes down to 2.0mm x 2.5mm.

The XP/XF families have stabilities as tight as ±25ppm for -40 °C to +85 °C and ±50ppm for -40 °C to +105 °C. For even tighter stability, we recommend the XT family; with integrated TCXO technology, XT offers ±3ppm for -40 °C to +85 °C. Short lead-time, low noise, wide frequency range, excellent ambient performance, and very little engineering effort to incorporate this into your design makes the XT/XF/XP devices an excellent choice over other technologies.

XL, XA (Automotive) and XU High-Performance Clock Oscillators

The Renesas XL, XA (conforms to AEC-Q200), and XU crystal oscillators are available in HCMOS, LVPECL, LVDS, and HCSL outputs. The XU and XL/XA families have 300fs and 750fs typ. RMS phase jitter (12kHz – 20MHz), respectively. Devices are offered with frequency stability options of ± 20ppm, ± 25ppm, ± 50ppm, or ± 100ppm and fast lead times for custom frequencies from 16kHz to 1.5GHz. These products feature industry-standard packages (3.2mm x 2.5mm, 5mm x 3.2mm, 7mm x 5mm) and pin-outs. These products have the performance, price, and delivery to meet your design requirements. Applications include networking, vision system, infotainment, communications, data I/O, storage, and servers.

Low-noise, Low-Power Crystal Oscillators

Renesas crystal oscillator devices are low-power crystal oscillators that can be used in standard 5mm x 7mm quartz oscillator footprints. The phase noise performance of the Renesas crystal oscillators enables their use as reference clocks for phase-noise sensitive applications. The low-power oscillators are ideal for clock generation where low phase-noise reference clocks improve transmission distance or reduce bit error rates and conversion errors of data transmission lines. Additional examples of application uses can be found in wireless infrastructure radio and base-band processing units, high-speed SerDes clocking (for instance S-RIO 1.3 and 2.1), PCI Express® Generation 1, 2 and 3, various Ethernet interfaces (Gigabit Ethernet, XAUI and 10Gbit Ethernet), optical interfaces in SDH/SONET applications (OC-12, OC-48, and OC-192) and in driving DAC/ADC devices in instrumentation applications.

Key Selection Criteria for Quartz Oscillator ICs

While physical footprints have tended to standardize, quartz oscillator ICs offer various features and levels of performance. Key attributes include:

  • Output type: This is the signaling type of the output that is required of the crystal oscillator circuit. Renesas offers CML, HCMOS, LVCMOS, HCSL, LVDS, and LVPECL.
  • Output frequency range: The valid range of output frequencies. Renesas offers quartz crystal oscillators to address the frequency needs of all popular applications.
  • Core voltage: The supply voltage used to power the device. This is typically defined by the power rails available in the system and often has implications on the voltage levels of the output. The Renesas low-power oscillators are offered in 1.8V, 2.5V, and 3.3V options.
  • Phase jitter: Defined as the undesired deviation from an ideal periodic timing signal. Renesas low-power oscillators offer typical RMS phase jitter down to 120fs integrated over 12kHz to 20MHz for high-performance applications.

About Crystal Oscillators and Crystal Oscillator Replacement

A crystal oscillator (or clock oscillator) uses the mechanical resonance of a vibrating crystal or piezoelectric material to create an electrical signal at a precise frequency. This frequency is commonly used to provide a stable clock signal for digital integrated circuits within a system. The most common type of piezoelectric resonator used is the quartz crystal. In general, a crystal oscillator circuit sustains oscillation by accepting a voltage signal from the resonator, amplifying it, and feeding it back to the resonator. When the energy of the generated output frequency matches the losses in the circuit, the oscillation can be sustained. Renesas offers thousands of timing products (such as quartz crystal oscillators/clock oscillators) to suit the needs of most applications.

Product Selection Table

    Processing table
    Function
    Output Type
    Output Freq Range (MHz)
    Supply Voltage (V)
    Phase Jitter Max RMS (ps)
    Freq. Stability Total (± PPM)
    Temp. Range
    105°C Max. Case Temp.
    Part Number
    XA
    1000fs Automotive Quartz-based PLL Oscillator    		 XO HCMOS, LVDS, LVPECL 0.75 - 1350 2.5, 3.3 1 25, 50, 100 -40 to 85°C, -40 to 105°C, -40° to 105°C
    XF
    150fs Small Plastic Package Quartz-based PLL Oscillator    		 VCXO, XO CML, HCSL, LVDS, LVPECL 15 - 2100 1.8, 3.3, 2.5 0.15 25, 50 -40 to 85°C, -40 to 105°C
    XK
    55fs Small Package Quartz-based PLL Oscillator    		 XO HCSL, LVCMOS, LVDS 50 - 1250 1.8, 3.3 0.055 30, 50 -40 to 85°C
    XL
    1000fs Quartz-based PLL Oscillator    		 VCXO, XO HCMOS, LVDS, LVPECL 0.75 - 1350 2.5, 3.3 1 20, 25, 50, 100 -20° to 70°C, -40 to 85°C, -40° to 85°C, -40° to 105°C
    XP
    150fs Ceramic Package Quartz-based PLL Oscillator    		 XO CML, HCSL, LVDS, LVPECL 15 - 2100 1.8, 2.5, 3.3 0.15 25, 50 -40 to 85°C, -40 to 105°C
    XT
    150fs Small Plastic Package Quartz-based PLL Oscillator with Integrated TCXO    		 TCXO HCSL, LVDS, LVPECL 15 - 2100 1.8, 3.3 0.15 3 -40 to 85°C
    XU
    400fs Quartz-based PLL Oscillator    		 XO HCMOS, HCSL, LVDS, LVPECL 0.75 - 1350 3.3, 2.5, 1.8 0.4 20, 25, 50, 100 -20° to 70°C, -40° to 85°C, -40° to 105°C
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    Documentation

    Title
    		Type Date
    Fox XpressO to Renesas Part Number Cross Reference
    PDF 7.95 MB     		Guide
    High-Performance Clock Oscillator Family Overview
    PDF 525 KB     		Overview
    Timing Solutions Products Overview
    PDF 872 KB     		Overview
    3 items