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U9131X - TONE/PULSE DIALER

General Description

The UTC U9131X series are monolithic ICs that offer the dialing signals in either pulse or tone mode.

The UTC U9131X series feature a redial memory.

Key Features

  • S.
  • Uses 4×4 keyboard.
  • Pulse-to-tone (P→T) keypad for long distance call operation.
  • Easy operation with redial, flash, pause, and P→T keypads.
  • 32 digits for redial memory.
  • Flash, Pause, P→T (pulse-to-tone) can be stored as a digit in memory.
  • Switchable dialing mode：DTMF/Pulse.
  • Switchable beak/make ratio.
  • Minimum tone output duration: 100mS.
  • Minimum intertone pause: 100mS.
  • On-chip power-on reset.
  • Uses 3.579545MHz crystal or ceramic resonator.

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Full PDF Text Transcription (Reference)

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UNISONIC TECHNOLOGIES CO., LTD U9131X Preliminary TONE/PULSE DIALER WITH REDIAL FUNCTION CMOS IC  DESCRIPTION The UTC U9131X series are monolithic ICs that offer the dialing signals in either pulse or tone mode. The UTC U9131X series feature a redial memory.  FEATURES * Uses 4×4 keyboard * Pulse-to-tone (P→T) keypad for long distance call operation * Easy operation with redial, flash, pause, and P→T keypads * 32 digits for redial memory * Flash, Pause, P→T (pulse-to-tone) can be stored as a digit in memory * Switchable dialing mode：DTMF/Pulse * Switchable beak/make ratio * Minimum tone output duration: 100mS * Minimum intertone pause: 100mS * On-chip power-on reset * Uses 3.