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Datasheet File OCR Text: |
Communication ICs Single chip analog signal processor for facsimiles BH8220KS The BH8220KS is a single-chip analog signal processing IC developed for facsimiles with telephone answering machines. FApplications Facsimiles and facsimiles with telephone answering machines FFeatures 1) Cross-point mixer with nine inputs and eight outputs. 2) Internal electronic volume. 3) Internal ALC and VOX circuits. 4) Accommodates no-ringing reception. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 343 Communication ICs FBlock diagram BH8220KS 344 Communication ICs FPin descriptions BH8220KS 345 Communication ICs FElectrical characteristics BH8220KS (unless otherwise noted, Ta = 25_C, VCC = 5V, f = 1kHz, 400Hz to 30kHz using band pass filter) 346 Communication ICs BH8220KS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V, f = 1kHz, 400Hz to 30kHz, band pass filter) FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 5V, f = 1kHz, 400Hz to 30kHz, band pass filter) 347 Communication ICs FMeasurement circuit BH8220KS FControl methods (1) Truth table 348 Communication ICs (2) Timing chart BH8220KS (3) Cross-point switch unit (bits used : 0 to 71) (4) Electronic volume (bits used : 72 to 79) (5) Cross-point unit electronic volume (bits used : 80 to 88) (6) Modem RX selector switch 349 Communication ICs (7) OUT7 pin (8) BH8220KS 1) Control table (selected with "1"; OFF = 0, ON = 1) 2) Bits 89 to 92 are reserved for use as spare bits. 3) When resetting, Bit 95 is "1" and all other bits are "0". FElectrical characteristic curves 350 Communication ICs FExternal dimensions (Units: mm) BH8220KS 351 |
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