32.768–kHz Oscillator Specifications

Load capacitance (CL)

10

12.5

25

pF

 

 

 

 

 

Drive level

1

μW

 

 

 

 

 

Crystal type

Tuning fork (X+5o or X+2o cut)

 

 

The following values are not required for the crystal oscillator to function, but they directly affect the performance of the oscillator in the system because they determine the accuracy of the crystal itself. The values given represent those seen on typical crystals used for timekeeping, and are provided for information only.

Specification

Minimum

Typical

Maximum

Unit

 

 

 

 

 

Frequency tolerance

+/-5

+/-20

+/-30

ppm

 

 

 

 

 

Parabolic curvature

-0.042

-0.05

ppm/ oC

Turnover temperature

20

25

30

oC

Temperature range

0

60

oC

Aging

+/-3

+/-5

ppm/year

 

 

 

 

 

C-4

SA-1100 Developer’s Manual

Page 384
Image 384
Intel SA-1100 manual KHz Oscillator Specifications