HT9302 Series -- 1-Memory/2-Memory Tone/Pulse Dialer

General Description

The HT9302 series tone/pulse dialers are CMOS LSIs for telecommunication systems. They are designed to meet various dialing specifications through resistor option matrix.

The HT9302 series provide the pin-selected lock function, Hold-line, Hand-free and LCD dialing number display interface, all of which are suitable for feature phone applications. HT9302G is simpler than HT9302X version. It provides only a redialing memory for simple low-cost system applications.

Features

  • Universal specification
  • Operating voltage: 2.0V~5.5V
  • Low standby current
  • Low memory retention current: 0.1ľA (Typ.)
  • Tone/pulse switchable
  • Interface with LCD driver
  • 32 digits for redialing
  • 32 digits for SA memory dialing
  • One-key redialing
  • Pause and P->T key for PBX
  • 4x4 keyboard matrix
  • 3.58MHz crystal or ceramic resonator
  • Hand-free control
  • Hold-line control
  • Pause, P->T can be saved for redialing
  • Lock function
  • Keytone function
  • Resistor options:
    - M/B ratio
    - Flash function and flash time
    - Pause and P->T duration
    - Pulse number
  • HT9302A: 18-pin DIP package
    HT9302B: 22-pin SKDIP package
    HT9302C: 20-pin DIP package
    HT9302D: 24-pin SKDIP package
    HT9302G: 16-pin DIP/NSOP package

Technical Document