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PDF BU2185F Data sheet ( Hoja de datos )
| Número de pieza | BU2185F | |
| Descripción | Clock generator | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BU2185F (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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Multimedia ICs
Clock generator
BU2185F
This IC generates the different clock used for DVD. Generates clocks for CD use, sound use, and MPEG use.
•Applications
DVD players
•Features
1) By connecting a crystal oscillating element, the dif-
ferent clock signals are generated.
2) Enables selection of the reference clock directly or
with 1 / 2 output.
3) SOP 16-pin package.
4) Single 3.3V power supply.
5) With the standard clock output, an independent 5V
power supply can be applied for a 5V output.
•Block diagram
XTAL1 IN
XTAL1 OUT
XTAL1
OSC
DATA1A
DATA1B
PLL1
CLK2
(27.0000MHz )
CTRL1
SW
H
CTRL2
L
1/2
XTAL2 IN
XTAL 2OUT
XTAL2
OSC
PLL2
DATA2A
DATA2B
OE
CTRL1
H
L
H
L
CTRL2
L
L
H
H
SW PLL1
H DATA1A
L DATA1A
H DATA1B
L DATA1B
∗DATA1A = XTAL2 375 / 128 / 4
∗DATA1B = XTAL2 375 / 64 / 4
∗DATA2A = XTAL2 147 / 40 / 4
∗DATA2B = XTAL2 147 / 20 / 4
CLK1
(36.8640MHz)
(18.4320MHz)
CLK3
(33.8688MHz)
PLL2
DATA2A
DATA2A
DATA2B
DATA2B
1
1 page  
Multimedia ICs
•Application example
L
AGND
DGND
DVDD
36.8640MHz
H
AGND
DGND
DVDD
18.4320MHz
BU2185F
1 XTAL1 IN
2 XTAL1 OUT
3 CTRL2
4 AGND
5 DGND
6 DVDD
7 XTAL2 IN
8 XTAL2 OUT
OE 16
CTRL1 15
CLK3 14
AVDD 13
DVDD 12
CLK2 11
DVDD 10
CLK1 9
1 XTAL1 IN
2 XTAL1 OUT
3 CTRL2
4 AGND
5 DGND
6 DVDD
7 XTAL2 IN
8 XTAL2 OUT
0.1µF
OE 16
CTRL1 15
CLK3 14
AVDD 13
DVDD 12
CLK2 11
DVDD 10
CLK1 9
H : ENABLE
L : DISABLE
H : 36.864MHz
L : 18.432MHz
33.8688MHz
AVDD
DVDD
27.0000MHz
DVDD
36.8640MHz
18.4320MHz
H : ENABLE
L : DISABLE
H : 18.432MHz
33.8688MHz
AVDD
DVDD
27.0000MHz
DVDD
18.4320MHz
0.1µF
•Attached components
Since high frequencies are handles, use this IC mounted on a PC board. If used mounted by a socket, the proper
characteristics may not be able to be obtained. Be sure to connect a 0.1µF capacitor between the analog power sup-
ply and analog GND.
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet BU2185F.PDF ] | |
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