IL91531 dialer equivalent, parallel input tone/pulse dialer.
of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, VIN and VOUT sho.
Pin No. Designation 1 MODE
DESCRIPTION
Tone mode select input. When this input is high, the tone output and ASK output are normal. When this input is low, a DTMF signal will be generated continuously and any new input data will be ignored. This inpu.
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