C271AD single-chip micro-computer communication integrated circuit diagram

Published:2011/5/10 1:16:00 Author:Fiona | Keyword: single-chip micro-computer communication | From:SeekIC

C271AD is a single-chip micro-computer communication integrated circuit. It's widely used in wireless phones and other communication devices. 1. Features C271AD integrated circuit's in-circuit is mainlyformed by the key position pulse generator circuit, the key instruction encoding circuit, the clock oscillation circuit, two-tone and pulse signal processing circuit,pulse dialing rate intermittent selection circuit,dial-up mode selection circuit, hands-free control circuit, squelch Control circuit etc. 2. pin functions and data C271AD related pin letter designations, function descriptions and data are listed in Table 1. Table 1 C271AD integrated circuit's pin functions and data 3. Typical application circuit the control system typical application circuit which isformed by the C271AD integrated circuit is shown in Figure 1. Figure 1 The typical application circuit of the C271AD integrated circuit



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