поискавой системы для электроныых деталей |
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BA8274F датащи(PDF) 6 Page - Rohm |
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BA8274F датащи(HTML) 6 Page - Rohm |
6 / 9 page BA8274 / F Audio ICs 6/8 2. Loading calculations for the expanded I 2C bus. SDA SDA LDA BA8274/F 3000pF Fig.4 BA8274/F VCC 5V EXISTING PROPOSED BUS EXPANSION GND 0V R3 R2 R1 I 2 C I 2 C = 333k Ω R2 = 1 µsec 3000pF Buffered bus pull-up Effective capacitance Buffered line Wiring Cap. 3000pF Total Cap. 3000pF = 20k Ω R1 = 1 µsec 50pF I2C pull-up Effective capacitance Near I2C devices 2 × I2C Devices 20pF Strays 20pF BA8274 Buffer 10pF Total Cap. 50pF = 33k Ω R3 = 1 µsec 30pF I2C pull-up Effective capacitance Remote I2C devices 1 × I2C Devices 10pF Strays 10pF BA8274 Buffer 10pF Total Cap. 30pF As an addition to an existing system: R2 = = 300 Ω R2 × 0.1R3 R2 + 0.1R3 R1 = 20k Ω R3 not required since buffer always connected. For a permanent system: R2 = = 262 Ω 1 ++ 1 0.1R1 1 0.1R2 1 0.1R3 R1 and R3 not required since buffer always connected. |
Аналогичный номер детали - BA8274F |
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Аналогичное описание - BA8274F |
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