Sub for MT8888 DTMF transceiver

Semiconductor Integrated Circuits (ICs)
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1

Zarlink MT8888CN1 obsoleted. Any suggestions for similar part?

2

Greetings,

Listings for potential alternatives at some level will likely be found here.

Since the landline/circuit-switched/POTS telephony applications that parts like this primarily served are all but gone, (near-)direct alternatives may prove difficult to find.

3

Agree with rick_1976, nothing really drop-in. 2 ways I see:

  1. Existing product: last time buy from brokers, but only with test report. Old Zarlink parts get relabeled a lot.
  2. New design: do DTMF in MCU firmware. Decode is Goertzel on 8 frequencies, send is PWM or DAC with filter. Cheaper than hunting an obsolete part.
    Is it for repair of old board or new design? That changes the answer.