MICROCIRCUIT CRYSTAL OSCILLATOR TERMINOLOGY |
| NOMINAL FREQUENCY |
Customer specified frequency |
| FREQUENCY ACCURACY @
+25 °C
(Setting and/or Calibration Tolerance) |
How close to the specified frequency the output frequency is factory adjusted at +25 °C.
|
| FREQUENCY STABILITY
Vs. TEMPERATURE
|
The maximum frequency deviation over a specified temperature range with respect to the frequency measured at +25 °C
+ 1 °C. This can be expressed as a percentage, PPM, or in scientific notation, e.g.
+ 0.005%, or + 50PPM, or 50(10)-6. |
| OPERATING TEMPERATURE RANGE
|
The operating temperatures range over which the frequency stability and other electrical parameters must remain within their specified limits.
|
| AGING |
Long term frequency changes which are due primarily to variations in the crystal and other oscillator components.
|
| INPUT CURRENT |
The current drawn by the device from the power source at a specified supply voltage.
|
| RISE TIME (TTL) |
The time required for output voltage to rise from 0.6 VDC to 2.2 VDC.
|
| RISE TIME (CMOS & ECL) |
The time required for output voltage to rise from 10% to 90% of the peak to peak output.
|
| FALL TIME (TTL) |
The time required for output voltage to drop from 2.2 VDC to 0.6 VDC.
|
| FALL TIME (CMOS & ECL) |
The time required for output voltage to drop from 90% to 10% of the peak to peak output amplitude.
|
| SYMMETRY (TTL) |
The percentage of time the output voltage is above the TTL threshold (1.4VDC @
+25 °C). |
| SYMMETRY (CMOS & ECL) |
The percentage of time the output voltage is above the 50% point of the peak to peak output amplitude.
|