Euroquartz adds HCSL oscillator for reduced noise

Frequency control specialist, Euroquartz offers high speed current steering logic (HCSL) versions of its low phase jitter EQJF clock oscillator range. HCSL outputs deliver a less noisy solution compared with static logic types, explains Euroquartz, pointing out that this is a major benefit for mixed low voltage signal processing and essential in applications such as optical communications, PCI-Express (PCIe) and Intel chipsets.

The EQJF HCSL oscillators offer a range of frequencies from 50 to 700MHz with phase jitter of 150fs typical, 300fs maximum. The oscillators are produced in the UK and available for delivery in one to two weeks. HCSL offers the fastest switching speeds with power consumption – at 94mA typical, 115mA maximum – lying between LVCS and LVPECL types.

The HCSL oscillators have a choice of supply voltages – 1.8, 2.5 or 3.3V – with frequency stability of ±25, ±50 and ±100parts per million (ppm) over both commercial (-10 to +70 degrees C) and industrial (-40 to +85 degrees C) temperature ranges available as standard. Tighter custom options can be supplied to special order.

Complementing the EQJF series, the EQVJF range of voltage-controlled crystal oscillators (VCXOs) offers frequencies from 150 to 700MHz with identical options and similar RMS phase jitter performance.

Both ranges feature maximum ageing of ±3ppm in first year (±2ppm per year thereafter), duty cycle of 50 per cent ± five per cent and rise times of 0.4ns maximum. Additional features include start-up time of five milliseconds typical, 10milli seconds maximum and output enable/disable functions.

Both the HCSL EQJF oscillators and EQVJF VCXOs are RoHS-compliant. They are housed in industry standard eight-pad, 7.0 x 5.0mm surface mount packages capable of withstanding 260 degree C for 10 seconds, twice.

Applications include flat panel displays for TVs, video streaming systems via external cables (e.g. LDI), high speed serial communications links such as SATA and FireWire, SONET, xDSL, SDH, set-top box and Ethernet cards.

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