NT93403-05

NT93403-05x PRELIMINARY Multi-Feature Phone LSI With LCD Driver Features 4-bit CMOS n The NT93403-05X is a multi-feature tone/pulse dialer based on a CMOS 4-bit single chip microcomputer with 5120 X 10 bit ROM and 1204 X 4 bit RAM capacity n Built-in LCD driver and direct interface with 16digit LCD display Dialing n Dialing parameters are set by external diodes and the SELECT pin n Built-in high-precision dual-tone multi-frequency (DTMF) generator and on-chip pulse dialer n Switchable tone/pulse dialing n Dialing speeds of 10 or 20 pps and Make/Break Ratio of 40/60 or 33/67 n Normal or Sweden/Denmark modes for number of pulses selectable n Minimum DTMFsignal duration/separation guaranteed n Chain dialing n Manual dialing will execute as many digits as entered n Redial function (up to 48 digits) Long distance control n Three long distance control functions are available: (1) Key Lock: The chip will detect the key lock status (2) Pass Code: The chip will check pass code. (pass code replaces key) (3) Key and pass code n With the diode setting, three defaults can be chosen: 0,168 n Three-digit restriction codes are user-programmable n For restriction dialing, "0" and "168" can be restricted simultaneously n Complete and strict restriction dialing function. For example, "pause" key + "0" key will not dial out for "0" restriction dialing n "SOS" key is provided for forgotten pass codes, which when depressed, automatically resets to 000 Memory n 13 24-digit memory locations: 3 dir...