ZL49031

www.DataSheet4U.com ZL49010/1, ZL49020/1, ZL49030/1 Wide Dynamic Range DTMF Receiver Data Sheet Features Wide dynamic range (50dB) DTMF Receiver Call progress (CP) detection via cadence indication 4-bit synchronous serial data output Software controlled guard time for ZL490x0 Internal guard time circuitry for ZL490x1 Powerdown option (ZL4901x & ZL4903x) 3.579MHz crystal or ceramic resonator (ZL4903x and ZL4902x) External clock input (ZL4901x) Guarantees non-detection of spurious tones Ordering Information ZL49010DAA ZL49011DAA ZL49020DAA ZL49021DAA ZL49030DCA ZL49030DCB ZL49030DDA ZL49030DDB ZL49031DCA ZL49031DCB ZL49031DDA ZL49031DDB 8 Pin PDIP 8 Pin PDIP 8 Pin PDIP 8 Pin PDIP 18 Pin SOIC 18 Pin SOIC 20 Pin SSOP 20 Pin SSOP 18 Pin SOIC 18 Pin SOIC 20 Pin SSOP 20 Pin SSOP Tubes Tubes Tubes Tubes Tubes Tape & Tubes Tape & Tubes Tape & Tubes Tape & September 2003 Reel Reel Reel Reel Applications Integrated telephone answering machine End-to-end signalling Fax Machines -40 ° C to +85° C signal and requires external software guard time to validate the DTMF digit. The ZL490x1, with preset internal guard times, uses a delay steering (DStD) logic output to indicate the detection of a valid DTMF digit. The 4-bit DTMF binary digit can be clocked out synchronously at the serial data (SD) output. The SD pin is multiplexed with call progress detector output. In the presence of supervisory tones, the call progress Description The ZL490xx is a family of high pe...