UM-1     Inverted MESA CRYSTAL UNITS

Features

• High frequency accuracy (Stability and low Aging)
• Very wide frequency range
• Reliable, hermetic sealed package

Specification

Typ

UM-1

Frequency range

55 MHz ~ 180 MHz

Vibration mode

AT cut  fundamental

Frequency tolerance (25°C  ±2°)

± 10 ppm   ~  ± 25 ppm

Freq. stability (Ref. @ +25°C)

± 10 ppm   ~  ± 25 ppm

Aging

< ± 2 ppm  1^st year     < ± 1 ppm   on request

Operating temperature range

- 20  ~  + 70°C   standard
- 40  ~  + 85°C on request

Load capacitance

Series resonance  or  Parallel resonance (CL < 32  pF)

Equivalent series resistance R1

< 30

Motional capacitance C1

8 fF typ.  for 155.52 MHz

Spurious response

Non for Fo ~ 200kHz,  else –2dB min.

Drive Level

50 µW

Additional specs on request