BU8241F Rohm, BU8241F Datasheet
BU8241F
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BU8241F Summary of contents
Page 1
... Cross point mixer for telephones BU8241F / BU8241FS / BU8242F / BU8244F The BU8241F, BU8241FS, BU8242F, and BU8244F are ICs developed for use with cordless telephones, and are equipped with switching and mixing functions. In addition, these ICs are provided with an internal power save function which enables the circuit to be run on line current if the power supply fails, by connecting a switch between the circuit and a new handset, reducing line current consumption ...
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... Communication ICs FBlock diagram BU8241F / BU8241FS / BU8242F / BU8244F 267 ...
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... Communication ICs FAbsolute maximum ratings (Ta = 25_C) FRecommended operating range (Ta = 25_C) 268 BU8241F / BU8241FS / BU8242F / BU8244F ...
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... Communication ICs FElectrical characteristics (unless otherwise noted 25_C, V BU8241F / BU8241FS / BU8242F / BU8244F = 5V) DD 269 ...
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... Communication ICs FPin descriptions FInput / output circuits 270 BU8241F / BU8241FS / BU8242F / BU8244F ...
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... Table 1 for the logic of switch settings.) Table.1 Switch Sn stage (Note 6) (5) With the BU8244F, DIN is 16 bits. The ON path in the power save mode is the same for the BU8241F and BU8241FS, but the pertinent switches are S1 and S6. Table.2 Power save setting theory , D ...
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... Communication ICs FApplication example 272 BU8241F / BU8241FS / BU8242F / BU8244F ...
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... The constants shown in Figure 8 are set to match the oscillator output imped- ance. BU8241F / BU8241FS / BU8242F / BU8244F 3) Components related to output pins C613 to C620: DC cutoff capacitor. A value should be selected which does not attenuate voice signals in the high band (300 Hz X). ...
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... If noise is a problem, we recommend limiting the number of signals mixed in a single output. (5) Output load capacitance The capacitance connected to GND in relation to an out- put pin (the output load capacitance) should be kept to 50pF or lower. (BU8241F / BU8241FS / BU8242F) ...
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... Communication ICs FElectrical characteristic curves BU8241F / BU8241FS / BU8242F / BU8244F 275 ...
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... Communication ICs FExternal dimensions (Units: mm) 276 BU8241F / BU8241FS / BU8242F / BU8244F ...