11274-901 AMI Semiconductor, Inc., 11274-901 Datasheet - Page 15
11274-901
Manufacturer Part Number
11274-901
Description
Programmable Line Lock Clock Generator IC
Manufacturer
AMI Semiconductor, Inc.
Datasheet
1.11274-901.pdf
(39 pages)
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6.1
The VCXO may be coarse tuned by a programmable ad-
justment of the crystal load capacitance via XCT[3:0].
The actual amount of frequency warping caused by the
tuning capacitance will depend on the crystal used. The
VCXO tuning capacitance includes an external 6pF load
capacitance (12pF from the XIN pin to ground and 12pF
from the XOUT pin to ground). The fine tuning capability
of the VCXO can be enabled by setting the XLVTEN bit
to a logic-one, or disabled by setting the bit to a logic-
zero.
VCXO Coarse Tune
15
Table 11: VCXO Coarse Tuning Capacitance
Programmable Line Lock Clock Generator IC
Programmable Line Lock Clock Generator IC
Programmable Line Lock Clock Generator IC
Programmable Line Lock Clock Generator IC
XCT[3]
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
XCT[2]
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
XCT[1]
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
XCT[0]
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
FS6131-01
FS6131-01
FS6131-01
FS6131-01
CAPACITANCE (pF)
VCXO TUNING
10.00
10.84
11.69
12.53
13.38
14.22
15.06
15.91
16.75
17.59
18.43
19.28
20.13
20.97
21.81
22.66
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