BU2285FV Datasheet, PDF (6/7 Pages) Rohm – Clock generator IC

Multimedia ICs
zApplication example
0.1µF
16.9344MHz
0.1µF
0.1µF
L or NC(pull-up)
33.8688MHz or
36.864MHz
1 VDD 1
2 VSS 1
3 CLK16M
4 AVSS
5 AVDD
6 AVDD
7 AVSS
8 XTALIN
9 XTALOUT
10 NC
11 CTRLA
12 CLKA
CLK33M 24
CTRLB 23
CLK54M 22
OE 21
CLKDAC 20
DVDD 19
DVSS 18
DVSS 17
CLK27M 16
VDD2 15
VSS2 14
CLKB 13
BU2285FV
33.8688MHz
L or NC (pull-up)
54MHz
L or NC (pull-up)
13.5MHz or 27MHz
0.1µF
27MHz
0.1µF
16.9344MHz or
18.432MHz
zOperating notes
The BU2285FV is basically placed on the board.
Decoupling capacitance (0.1µF) need to be placed between Pin6 (AVDD) and Pin7 (AVSS).
Also Decoupling capacitance (0.1µF) need to be placed between Pin1 (VDD1) and Pin2 (VSS1), Pin4 (AVSS) and Pin5
(AVDD), Pin14 (VSS2) and Pin15 (VDD2), Pin18 (DVSS) and Pin19 (DVDD).
To obtain accurate frequency , capacitance( pF) need to be placed between Pin8 (XTALIN) and Pin7 (AGND), Pin9
(XTALOUT) and Pin7 (AGND).
Tantalum capacitance (10 to 100µF), ferrite beads may need to be placed to prevent power supply drop in certain boards
case.
To reduce high frequency noise, selected bypass capacitors (≤1Ω at problem high frequency) maybe used for power pin
as close to BU2285FV as possible.
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