LMK03806_15 Datasheet, PDF (21/66 Pages) Texas Instruments – Ultra Low Jitter Clock Generator With 14 Programmable Outputs

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Features Description (continued)
LMK03806
SNAS522I – SEPTEMBER 2011 – REVISED NOVEMBER 2015
OSCin
Crystal
VCO
/25
CLKout8
OSCin
XO or
External
Reference
VCO
/25
OSCout0
CLKout8
Figure 11. Start-Up Clock Using Crystal Reference
Figure 12. Start-Up Clock Using XO or Other
External Reference
8.4 Device Functional Modes
By using the tunable range of the VCO followed by a programmable divider, the LMK03806 can achieve any of
the frequencies in Table 1.
OUTPUT DIVIDER VALUE
1
2
3
4
5
6
7
8
9
10
11 to 1045
Table 1. Achievable Frequencies
ACHIEVED FREQUENCY (MHZ)
2370 - 2600
1185 - 1300
790 - 866.7
592.5 - 650
474 - 520
395.7 - 433
338.6 - 371.4
296.25 - 325
263.3 - 288.9
237 - 260
Any frequency in the range of 2.27 - 236.36
STANDARD/APPLICATION
Infiniband
SATA
SAS
Fast Ethernet
1 GbE
10 GbE
XAUI
Backplane
2G/4G/16G Fiber Channel
10G Fiber Channel
40/100 GbE
SONET
A/D Clocking
Table 2. Common Frequency Plans
OUTPUT FREQUENCIES (MHZ)
100, 200
75, 150, 300, 600
37.5, 75, 120, 150
25
125
156.25, 312.5, 625
78.125, 156.25, 312.5
227.27...
106.25, 212.5
159.375
644.53125, 322.265625,
161.1328125
19.44, 38.88, 77.76, 155.52,
311.04, 622.08
30.72, 61.44, 122.88, 153.6,
245.76, 491.52, 983.04
VCO FREQUENCY
2400 MHz
2500 MHz
2550 MHz
2578.125 MHz
2488.32 MHz
2457.6 MHz
RECOMMENDED CRYSTAL
VALUE
20 MHz
12.5 MHz
19.44 MHz
19.2 MHz or
12.288 MHz
Copyright © 2011–2015, Texas Instruments Incorporated
Product Folder Links: LMK03806
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