HT9320C Datasheet PDF - Holtek Semiconductor

General Description
The HT9320 series tone/pulse dialers are CMOS LSI for telecommunication systems. They are designed to meet various dialing specifications through resistor option matrix.

FEATUREs
Universal specification
Operating voltag0e: 2.0V~5.5V
Low standby current
Lowmemoryretentioncurrent:0.1A(typ.)
Tone/pulse switchable
Interface with LCD driver
32 digits for redialing
32 digits for the SA memory dialing
One-key redialing
Pause and PT key for PBX
3.58MHz crystal or ceramic resonator
Hand-free control
Hold-line control
Pause, PT can be saved for redialing
On-hook store function
Keytone function
Lock function
Resistor options
  M/B ratio
  Flash function and flash time
  Pause and PT duration
  Pulse number
  Inter-digit pause time for 10pps
Memory number: 22 memories
HT9320A/B/H/K/L-X: 28-pin DIP package
HT9320C: 22-pin SKDIP package