Saelig Company, Inc. has introduced the new 18HM series oscillators to the Euroquartz range of spread spectrum low-EMI oscillators. The low-cost oscillators offer the significant advantage of reducing EMI at the source— the system clock oscillator—removing the need to employ costly shielded backplanes, ferrite cores and similar techniques to reduce EMI.
Featuring a supply voltage of 1.8V, the new 18HM series oscillators are available in standard surface mount package sizes of 3.2 x 2.5mm, 5 x 3.2mm and 7 x 5mm with a choice of modulation rates and spread type.
Common specifications include frequency range from 12.5 to 42.0MHz, CMOS output logic, DC input voltage of 1.8V ±0.15V, frequency stability options of ±25ppm, ±50ppm and ±100ppm for commercial (0 to +70°C) and industrial (-40 to +85°C) devices, rise/fall times of 2.5ns maximum, 15pF load and start-up time 2ms typical. Duty cycle is 50% ±10%, standard, cycle to cycle jitter is ±100ps maximum and ageing is ±5ppm/year maximum at 25°C. The 18HM series oscillators are RoHS-compliant and lead-free, and can withstand two processes at 260°C for 10 seconds maximum.
