Audio ICs Bus interface for car audio BA8270F The BA8270F is a bus interface IC (master side) developed for car audio applications. When used with the BA8272F (slave side), it is possible to construct a communication system for the deck and components such as power amplifiers, CD and MD changers, tuners and TVs using BUS ON, DATA, CLOCK and RESET signals. Applications Car audio systems Features 1) Allows construction of a communication system with BUS ON, DATA, CLOCK and RESET signals when used with the BA8272F (slave side). 2) Ideal for car audio systems. Absolute maximum ratings (Ta = 25C) Recommended operating conditions (Ta = 25C) 705 Audio ICs Block diagram 706 BA8270F Audio ICs BA8270F Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 5.5V) 707 Audio ICs Measurement circuit 708 BA8270F Audio ICs BA8270F Measurement circuit switch operation table 709 Audio ICs BA8270F Application example Operation notes (1) We guarantee the application circuit design, but recommend that you thoroughly check its characteristics in actual use. If you change any of the external component values, check both the static and transient characteristics of the circuit, and allow sufficient margin in your selections to take into account variations in the components and ICs. External dimensions (Units: mm) 710 Note that Rohm has not fully investigated patent rights regarding this product. (2) Based on the EIAJ static electric destruction voltage measurement (C = 200pF and R = 0Ω), the withstanding voltage of pins 9 and 11 has been determined to be 200V or less. Take due care.