. 16-DTMF tone signal decoder . DTMF receiver with all necessary filters built-in . Dial tone filter . High-group bandpass filter . Low-group bandpass filter . Extended .
Number 1 2 3 4 5 6 7 8 Name INPUT OSCO OSCI VSS SD ACK EST VDD O I O O I/O I O I Description Input coupling capacitor required. Biased internally to VDD/2. An oscillating circuit is formed by connecting a 4.194304 MHz (LC73861) / 3.579545 MHz (LC7382.
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