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BU2285FV Datasheet(PDF) 6 Page - Rohm |
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BU2285FV Datasheet(HTML) 6 Page - Rohm |
6 / 7 page BU2285FV Multimedia ICs 6/6 Application example 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 CLK33M CTRLB CLK54M CLKDAC DVDD DVSS DVSS CLK27M VDD2 VSS2 CLKB OE VDD 1 VSS 1 CLK16M AVSS AVDD AVDD AVSS XTALIN XTALOUT NC CTRLA CLKA 0.1 µF L or NC (pull-up) 33.8688MHz 54MHz 27MHz 16.9344MHz or 18.432MHz 13.5MHz or 27MHz 0.1 µF L or NC (pull-up) 0.1 µF 16.9344MHz 33.8688MHz or 36.864MHz L or NC(pull-up) 0.1 µF 0.1 µF Operating 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 (0.1 µF) 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 100 µF), 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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