IL91210EN

IL91210EN TONE/PULSEDIALER The IL91210EN is a single-chip, silicon gate, CMOS integrated circuit with an on-chip oscillator for a 3.58 MHz crystal or ceramic resonator. It provides dialing pulse (DP) or dual tone multi-frequency (DTMF) dialing. A standard 4x4 matrix keyboard can be used to support either DP or DTMF modes. Up to 32 digits can be saved in the on-chip RAM for reading. In the DTMF mode, minimum tone duration and minimum intertone pause are provided for rapid dialing. Maximum tone duration is dependent upon the key depression time in manual dialing. One touch redial operation Tone/Pulse switchable 32-digit capacity for redialing Built-in power up reset circuit PABX auto-pause is 2.2 second ORDERING INFORMATION DTMF Timing: IL91210EN Manual dialing: minimum duration for bursts and pauses TA = -20° to 70° C Redialing: calibrated timing Wide operating voltage range: 2 V to 5.5 V Uses inexpensive ceramic resonator (3.58 MHz) Digits dialed manually after redialing are cascadable and stored as additional digits for the next redialing Automatic mixed redialing (last number redial) of pulse to DTMF with multiple automatic access pauses Four extra function keys: flash, pause, redial and DP or DTMF mixed dialing Four-by-four (or 2 of 8) keyboard can be used Low standby current Dial Pulse Rate: 10 pps DC ELECTRICAL CHARACTERISTICS(V CC =3.5 V,F OSC=3.579 MHz, TOP=+25° C) Symbol Parameter Test Conditions Guaranteed Limits Min VCC VMR VOC VOR IOL1 ...