High-speed current steering logic clock oscillators ideal for mixed low voltage signal processing

14-08-2018 | Euroquartz | Passives

Euroquartz now offers high-speed current steering logic (HCSL) versions of its ultra-low phase jitter EQJF clock oscillator range. HCSL outputs deliver a less 'noisy' solution compared with static logic types, a major benefit for mixed low voltage signal processing and essential in applications such as optical communications, PCI-Express and Intel chipsets etc.

This new generation of oscillators provides a range of frequencies from 50MHz to 700MHz with phase jitter of 150fs typical, 300fs maximum. HCSL offers the fastest switching speeds with power consumption at 94mA typical, 115mA maximum, which lays between LVCS and LVPECL types.

The EQJF series of HCSL oscillators offer a variety of supply voltages of– 1.8V, 2.5V or 3.3V, with frequency stability specifications of ±25ppm, ±50ppm and ±100ppm over both commercial (-10C to +70C) and industrial (-40C to +85C) temperature ranges available as standard. Tighter custom options can also be supplied.

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

Both ranges feature maximum ageing of ±3ppm in the first year (±2ppm per year after that), a duty cycle of 50%±5% and rise times of 0.4ns maximum. Additional features include start-up time of 5ms typical, 10ms maximum and output enable/disable functions.

RoHS compliant, the new HCSL EQJF oscillators and EQVJF VCXOs are housed in industry standard 8-pad, 7mm x 5mm surface mount packages capable of withstanding 260°C for 10 seconds, twice.

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

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