LB1009BE Search Results

CSB480e

Abstract: transistor tip 1050 circuit diagram of speech circuit
Text: MICROPROCESSOR-CONTROLLED, SINGLE-CHIP-TELEPHONE 1C LB1009-TYPE PRELIMINARY Description The LB1009 requires only a few external components see Figure 10 to provide all of the touch-tone electronic functions. This integrated circuit furnishes ac and dc loop termination for both switchhook states, transmits and receives