Mhz Crystals
Todays deals on Mhz Crystals?
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LOT OF 1000 PC’S P/N SG-615PH 32.0000MHZ CRYSTAL OSCILLATOR SMD ON REEL $799.99 |
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CRYSTAL TECHNOLOGY RFU-27MHZ USPP RFU27MHZ $726.80 |
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500PCS NEW 100mhz Crystal Oscillator SMD 5V 5mm x 7mm m $450.00 |
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1500 PCS 18.432MHz 18.432M 18.432 Crystal Oscillators /FREE registered mail $309.99 |
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500 PIECES NEW CRYSTALS HC49U KDS JAPAN 4.433619 MHZ m $299.00 |
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Ralton H160A-18.000-20, 011064052K, 18MHz 20pF crystals $249.95 |
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PACK 2000, 22.1184 MHz Crystal Oscillators HC-49S $255.00 |
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150 PCS 1.000MHz 5MMX7MM 1MHZ SMD-4 Crystal Oscillators $227.99 |
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Reel of 1000 CTS Components Crystal SMD Quatrz 8 MHz ROHS 20PF ATS08ASM-1 $199.99 |
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Pack2000, 28MHz / 28.000 MHZ Crystal Oscillator HC-49S $208.00 |
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Pack2000, 20MHz / 20.000 MHZ Crystal Oscillator HC-49S $208.00 |
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Pack2000, 16MHz / 16.000 MHZ Crystal Oscillator HC-49S $208.00 |
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Qty=100 FOX F1145E 80 MHz 5v crystal oscillator NEW RoH $199.00 |
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PACK 1000, 10MHz / 10.000 MHZ Crystal Oscillator HC-49U $199.00 |
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PACK2000, 24MHz / 24.000 MHZ Crystal Oscillators HC-49S $199.00 |
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2000, 10.368MHz / 10.368 MHZ Crystal Oscillator HC-49S $198.00 |
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2000, 10.368MHz / 10.368 MHZ Crystal Oscillator HC-49S $195.00 |
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PACK2000, 8MHz / 8.000 MHZ Crystal Oscillator HC-49S $195.00 |
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New 1000 CRYSTAL 20MHZ SERIES SMT Electronic Component ATS-200SM-1 CTS 5A 052 $168.88 |
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PACK1000, 12MHz / 12.000 MHZ Crystal Oscillator HC-49U $189.00 |
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1000pcs 22.1184MHz Crystal Oscillator DIP Mount Type Quartz Crystal for PC $188.10 |
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1000pcs 20MHz 20.000MHz 20M HZ Crystal Oscillator HC-49S $188.10 |
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New 1000 CRYSTAL 20MHZ SERIES SMT Electronic Component $168.88 |
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PACK2000, 6MHz / 6.000 MHZ Crystal Oscillators HC-49S $185.00 |
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HP 10811-60165 Double Oven CRYSTAL OSCILLATOR,10Mhz $159.00 |
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PACK2000, 12MHz / 12.000 MHZ Crystal Oscillator HC-49S $179.00 |
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PACK2000, 4MHz / 4.000 MHZ Crystal Oscillator HC-49S $179.00 |
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2000PCS, 12MHz / 12.000 MHZ Crystal Oscillator HC-49S $178.00 |
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1000 TXC 27.000 MHZ SMD Crystal Quartz Oscillator NEW m $175.00 |
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100 TOYOCOM 57.000 MHz CRYSTALS OSCILLATORS $168.00 |
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100 PCS 22.1184MHZ 5X7 22.118 SMD Crystal Oscillators 3.3V /FREE registered mail $171.99 |
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LOTS OF 3 VECTRON CRYSTAL OSCILLATOR 276-9623-1 70MHZ $140.00 |
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160 PCS CRYSTAL OSC MPC ( Monitor P C ) 970H 32.000000 MHz TYPE: high stand off $140.00 |
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Lot of 16 16.00 MHz crystal oscillator CRYSTEK GOLLEDGE $149.00 |
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500 PCS 30.000MHz SMD 30.000M 30MHZ 30M Crystal NEW /FREE Registered Mail $159.99 |
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100pcs 20.000MHZ 20MHz SMD Crystal Oscillator 5mm x 7mm $159.00 |
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500PCS 7.3728MHz 7.3728 MHZ Crystal Oscillator HC-49U/S $157.99 |
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100 PCS 30.000MHz 30MHZ DIP-4 Crystal Oscillators 3.3V $153.99 |
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110 PCS CRYSTAL OSC MPC ( Monitor P C ) 975H 40.000 MHz $125.00 |
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100 PCS 16.000MHz 3225 16MHZ SMD-4 Crystal Oscillators $145.99 |
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Crystal Oscillator 10 MHz OCXO TESTED VERY ACCURATE $134.99 |
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989 PC’S CRYSTAL QUARTZ 30SM155-01 4.000 MHZ $129.99 |
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100x 100.00MHz DIP-4 100.00M 100MHz 100M Crystal Oscillators/FREE Register Mail $134.99 |
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1000pcs 24MHz Crystal Oscillator 24MHz Crystal HC-49S $133.83 |
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1000PCS Epson-Toyocom MA-506 24.576MHz Crystal $130.00 |
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HP Agilent Piezo 2830015 10 MHz Crystal Oscillator OCXO $115.00 |
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EROS-750-MA111 5.119155MHZ Crystal Oscillator Module $119.95 |
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EROS-800-LEI-1 5.00000MHZ Crystal Oscillator Module $119.95 |
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80 VALPEY 8.68 MHz CRYSTAL OSCILLATORS – NEW $123.00 |
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160 VALPEY 4.032 MHz CRYSTALS HC-18 PKG. NEW $125.00 |
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Lot of 250 30MHz Crystal Oscillators MMD300WKK0 $125.00 |
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1000 PCS TAITEN 4 MHZ CRYSTALS – CASE SIZE HC-49 – NEW $125.00 |
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RALTRON CO1100 * 10.000 MHz CRYSTAL OSCILLATOR 100 PACK $110.00 |
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10 UNITS OF GOLLEDGE 10.0MHz GTXO-H10 Crystal Oscillator $99.00 |
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F.I.L Russian Quartz Crystal 18,583MHz ,Lot of 1700 $100.95 |
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F.I.L Russian Quartz Crystal 17,376MHz ,Lot of 1750 $100.95 |
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PARK 1000 12 MHZ 12.000 Crystal Oscillator SMD 1000PCS $99.00 |
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100 PCS 27.120MHz DIP-2 27.120 MHz 27.120M 27.12M HC-94S Crystal /FREE Reg Mail $118.89 |
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1000 PC 3.579545MHz DIP-2 3.579545 MHz 3.579545M HC-49S Crystal NEW/Free RegMail $111.99 |
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Omni-Spectra 20090 Crystal Detector 10MHz – 12.4 GHz $110.00 |
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Crystal Oscillator Microwave RF 10.000 MHz OCXO TESTED $99.00 |
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New Agilent / Bliley 10MHz Crystal Oscillator 0960-0612 $99.00 |
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Microwave Crystal Oscillator 1036.25 MHz PN: 5044-1056 $100.00 |
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100PCS NEW 100mhz Crystal Oscillator SMD 5V 5mm x 7mm m $108.00 |
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Vectron OCXO RF Crystal Oscillator 10 MHz TESTED SMA $99.99 |
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1000 CITIZEN CRYSTAL 4.096 MHZ 18PF SMD # HCM49-4.096 *New* $95.00 |
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HP/Agilent 423A Crystal Detector, 10 MHz – 12.4 GHz $80.00 |
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NEW ECS-160-20-4DN ECS-160-20-4XDN CRYSTAL 16.000 MHZ 20PF 49US x 200PCS $99.99 |
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Lot of 60 pcs Crystals HC49U 2.98295mhz 2.98295 mhz JAN spec $99.99 |
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TEKTRONIX 119-0262-00 5.0mhz crystal oscillator module $95.00 |
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2 UNITS OF VECTRON CRYSTAL OSCILLATOR 229Y0210 Freq. 28.8 MHz $75.00 |
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RF Microwave Crystal Oscillator 10.000 MHz PCOXO-HPO2 $100.00 |
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10 PC’S P/N SM1100JP 65.5360MHZ 4 PINS Crystal Oscillator $99.99 |
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1 MHz Vintage Quartz Crystal oscillator Lot of 1 $99.99 |
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HP Agilent 10 Mhz Crystal Oscillator 10811-60111 $89.95 |
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1000,10MHz / 10.000 MHZ Crystal Oscillator HC-49S,NEW $99.00 |
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1000,18.432MHz / 18.432 MHZ Crystal Oscillator HC-49S $99.00 |
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Vectron Microwave RF Crystal Oscillator 30MHz CO233FW-1 $99.00 |
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PACK1000, 6MHz / 6.000 MHZ Crystal Oscillators HC-49S $99.00 |
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LOT OF 100 TST TZ0462A 27.000MHZ SMD3225 +-10PPM Crystals & Oscillators $80.00 |
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1000PCS, 20MHz / 20.000 MHZ Crystal Oscillator HC-49S $98.00 |
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PACK1000, 10MHz / 10.000 MHZ Crystal Oscillator HC-49S $98.00 |
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500pcs 22.1184MHz Crystal Oscillator DIP Mount Type Quartz Crystal for PC $98.00 |
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1000PCS, 16MHz / 16.000 MHZ Crystal Oscillator HC-49S $97.00 |
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PKG1000, 22.1184 MHz Crystal Oscillators HC-49S NEW $96.00 |
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1000, 10.368MHz / 10.368 MHZ Crystal Oscillator HC-49S $96.00 |
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1000PCS, 8MHz / 8.000 MHZ Crystal Oscillator HC-49S $95.00 |
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1000, 10.368MHz / 10.368 MHZ Crystal Oscillators HC-49S $95.00 |
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4 UNITS OF VECTRON CRYSTAL OSCILLATOR 231-2763 Freq. 1 MHz $70.00 |
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1000PCS, 4MHz / 4.000 MHZ Crystal Oscillator HC-49S $94.99 |
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PACK1000, 4MHz / 4.000 MHZ Crystal Oscillator HC-49S $94.90 |
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PACK1000, 12MHz / 12.000 MHZ Crystal Oscillator HC-49S $94.00 |
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1000PCS, 12MHz / 12.000 MHZ Crystal Oscillator HC-49S $93.00 |
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1000PCS, 6MHz / 6.000 MHZ Crystal Oscillator HC-49S $93.00 |
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HP Agilent 10 Mhz Crystal Oscillator 10544A $79.95 |
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1000 PC’S P/N 18690C SMD CRYSTALS 8.192MHz $79.99 |
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Isotemp TCXO35-26 Crystal Oscillator. 10MHz (5Vp-p), 5VDC. $89.00 |
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50,20.000MHZ 20MHz SMD Crystal Oscillator 3.2mmx5mm NEW $89.00 |
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100 PCS 25MHz 5*7MM 5V 25 MHz 25M 25.000M 25.000MHz Crystal Oscillator $88.00 |
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Crystal Controlled Oscillator 32.768 MHz TV60A620 $75.00 |
Mhz Crystals Questions
Prototyping with Frequency-Flexible Crystal Oscillators
Developers of new systems should make decisions regarding clocking requirements early in the design process. Although clocking rates are critical parameters that should be known in advance, determining these rates sometimes requires experimentation and re-evaluation.
The ability to quickly change clock frequencies during the prototyping and validation stages of a design can accelerate time to market. The use of frequency-flexible, programmable crystal oscillators (XOs) as prototyping tools can facilitate the process of validating system performance and help streamline the overall product development cycle.
Evaluating Multiple Frequencies
When conducting any system design effort, frequency changes often become necessary late in the design cycle. In other cases, a bug or miscalculation in the design may require a change in frequency. In any of these situations, it helps to use XOs that are adaptable to last-minute changes without having to change the bill of materials or PCB layout, especially since lead time for fixed-frequency XOs may extend the development by weeks or even months.
Last-minute changes are very common, especially in FPGA-based applications. The extreme flexibility of FPGAs means that logic path widths and data rates can be quickly adapted to improve power, throughput or gate utilization.
Frequency Margining
Systems that use standard frequencies can also benefit from frequency-flexible XOs for design validation and frequency margining during production test. Although an Ethernet MAC or PHY may specify a 156.25 MHz reference XO, a fixed-frequency reference cannot exercise rate tolerances.
Frequency margining also can be carried out using multiple XOs and a multiplexer. The disadvantages of this scheme include the limited number of frequencies and the introduction of additional noise and phase discontinuities that occur when switching between frequencies.
Using external clock sources or multiple XOs to perform frequency margining often limits the designer’s ability to make fine frequency adjustments or validate a continuum of frequencies to troubleshoot suspected problem areas.
Traditional Frequency Flexible XOs Do Not Meet the Challenge
A better approach to the problem of performing frequency margining is to use in-circuit programmable XOs that can generate a continuum of frequencies with very high incremental frequency resolution without introducing phase glitching or compromising phase jitter performance.
To address this need, traditional XO suppliers use analog circuit techniques such as phase locked loops (PLLs) to overcome the frequency rigidity of conventional crystal oscillators.
However, analog PLLs are often limited to powers-of-two or integer frequency multiplication.
Power Supply Rejection Performance Also Affects System Prototyping and Debug Time
Analog PLLs are notoriously sensitive to noise, often coupling and amplifying noise sources through the power supply and internal VCO to the output clock signal. This sensitivity prevents analog PLLs from driving ultra-low jitter clock signals in high-performance systems where clocking flexibility is important and the environment tends to be noisy and hostile.
The system noise is largely due to transient load switching currents and the widespread use of switch mode power supplies (SMPS) in most computer, communications and consumer systems.
Integrated filtering and regulation translates directly into a BOM cost and component count savings since designers can minimize or even eliminate external power supply filters and ferrite bead components needed to maintain adequate jitter performance.
This reduced jitter performance makes common analog PLL-based XOs unsuitable for high speed networking applications, such as Gigabit (GbE) and 10 Gigabit Ethernet (10 GbE).
The bottom line?
About the Author
Silicon Labs – Oscillator and SLIC
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