BU2280FV_08 Datasheet, PDF (20/25 Pages) Rohm – DVD-video Reference Clock Generators for Audio/Video Equipments

●Example of application circuit
◎BU2280FV
0.1uF
27.0000MHz
27.0000MHz
0.1uF
33.8688MHz
1:VDD1
2:VSS1
3:CLK27M1
4:CLK27M2
5:AVDD
6:AVDD
7:AVSS
8:XTALIN
9:XTALOUT
10:VSS2
0.1uF
11:VDD2
12:CLK33M
24:CLK27M3
23:CTRLFS
22:CLK768FS
21:OE
20:CLK384FS
19:DVDD
18:DVSS
17:DVSS
16:CLK512FS1
15:CLK512FS2
14:VDD2
13:VSS2
27.0000MHz
OPEN:48.0kHz type
L:44.1kHz type
36.8640MHz
or 33.8688MHz
OPEN:Enable
L:Disable
18.4320MHz
or 16.9344MHz
0.1uF
24.5760MHz
or 22.5792MHz
24.5760MHz
or 22.5792MHz
0.1uF
Description of terminal
Fig.126
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
PIN name
VDD1
VSS1
CLK27M1
CLK27M2
AVDD
AVDD
AVSS
XTALIN
XTALOUT
VSS2
VDD2
CLK33M
VSS2
VDD2
CLK512FS2
CLK512FS1
DVSS
DVSS
DVDD
CLK384FS
OE
CLK768FS
CTRLFS
CLK27M3
PIN function
Power supply for 27MHz
GND for 27MHz
27.0000MHz Clock output terminal 1
27.0000MHz Clock output terminal 2
Power supply for Analog block
Power supply for Analog block
GND for Analog block
Crystal input terminal
Crystal output terminal
GND for 33MHz
Power supply for 33MHz
33.8688MHz Clock output terminal
GND for 33MHz
Power supply for 33MHz
CTRLFS=OPEN:24.5760MHz, CTRLFS=L:22.5792MHz
CTRLFS=OPEN:24.5760MHz, CTRLFS=L:22.5792MHz
GND for Digital block
GND for Digital block
Power supply for Digital block
CTRLFS=OPEN:18.4320MHz, CTRLFS=L:16.9344MHz
Output enable (with pull-up), OPEN:enable, L:disable
CTRLFS=OPEN:36.8640MHz, CTRLFS=L:33.8688MHz
15, 16, 20, 22PIN output selection (with pull-up)
OPEN:24.5760MHz(15PIN, 16PIN), 18.4320MHz(20PIN), 36.8640MHz(22PIN)
L:22.5792MHz(15PIN, 16PIN), 16.9344MHz(20PIN), 33.8688MHz(22PIN)
27.0000MHz Clock output terminal 3
Note) Basically, mount ICs to the printed circuit board for use. (If the ICs are not mounted to the printed circuit board, the characteristics of ICs
may not be fully demonstrated.)
Mount 0.1F capacitors in the vicinity of the IC PINs between 1PIN (VDD1) and 2PIN (VSS1), 5PIN-6PIN (AVDD) and 7PIN (AVSS), 10PIN
(VSS2) and 11PIN (VDD2), 13PIN(VSS2) and 14PIN (VDD2), 17PIN-18PIN (DVSS) and 19PIN(DVDD), respectively.
Depending on the conditions of the printed circuit board, mount an additional electrolytic capacitor between the power supply and GND terminal.
For EMI protection, it is effective to put ferrite beads in the origin of power supply to be fed to BU2280FV from the printed circuit board or to insert
a capacitor (of 1 or less), which bypasses high frequency desired, between the power supply and the GND terminal.
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