EQHM44

The EQHM44 series low EMI oscillators can reduce system EMI by 15dB.The oscillators are a 'drop-in' replacement for standard oscillators.EMI reduction is achieved by the use of Spread Spectrum Technology whereby the mode energy is spread over a wider bandwidth. The modulation carrier frequency, operating in the kHz region, makes the process transparent to the oscillator frequency.There is a choice of modulation rates and spread to suit application requirements.

Features of the EQHM44 are:(1)provides up to 15dB reduction in system EMI; (2)'drop-in' replacement for standard clocks; (3)choice of modulation rate and spread; (4)miniature package: 5.0 mm x 3.2 mm x 1.2mm.In electrical systems the principal cause of electromagnetic interference (EMI) is the system clock oscillator. Traditional methods of 'patching-up' systems with too high a level of EMI is to use ferrite beads, filters, ground planes, metal shielding and similar costly methods, However, the most efficient and economicmethod to reduce EMI is to reduce it at source: replace the system clock ocillator with a low EMI clock oscillator.

The absolute maximum ratings of the EQHM44 can be summarized as:(1)storage temperature range:-65 to 150;(2)input voltage:Vdd = +3.3VDC ±5%;(3)output impedance:40 Ohms typical;(4)load:15pF.The products described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where chance of failure is intolerable (i.e., submersible repeater and artificial satellite).