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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AT43USB326 데이터시트(PDF) 78 Page - ATMEL Corporation |
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AT43USB326 데이터시트(HTML) 78 Page - ATMEL Corporation |
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78 / 102 page  78 AT43USB326 3313D–USB–04/06 Note: XTAL2 must not be used to drive other circuitry. Note: 1. With external 27 Ω series resistor. Figure 13. Full-speed Load Table 17. Oscillator Signals: XTAL1, XTAL2 Symbol Parameter Condition Min Max Unit VLH OSC1 switching level 0.47 1.20 V V HL OSC1 switching level 0.67 1.44 V CX1 Input capacitance, XTAL1 10 pF CX2 Output capacitance, XTAL2 10 pF C12 OSC1/2 capacitance 5 pF tSU Start-up time 6 MHz, fundamental 2 ms DL Drive level 50 µW Table 18. USB Driver Characteristics, Full-speed Operation Symbol Parameter Condition Min Max Unit TR Rise time CL = 50 pF 4 20 ns TF Fall time CL = 50 pF 4 20 ns TRFM TR/TF matching 90 110 % ZDRV Driver output resistance(1) Steady state drive 28 44 Ω TxD+ TxD- R S R S C L C L C L = 50 pF |
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