The M-991 is a call progress tone generator integrated circuit for use in telephone systems. The circuit uses low-power CMOS techniques to generate tones which are digitally controlled and highly linear. The M-991 is designed to permit operation with almost ...
The M-986-1R2 and -2R2 MFC Transceivers contain all the logic necessary to transmit and receive CCITT R2F (forward) and R2B (backward) multifrequency signals on one 40-pin integrated circuit (IC). M-986- 1R2 is a single-channel version; M-986-2R2 provides tw...