HT9315C Datasheet PDF - Holtek Semiconductor

General Description
The HT9315 series tone/pulse dialers are CMOS LSIs for telecommunication systems. They are designed to meet various dialing specifications through resistor option matrix.

FEATUREs
 Universal specification
 Operating voltage: 2.0V~5.5V
 Low standby current
 Low memory retention current: 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
 45 keyboard matrix
 3.58MHz crystal or ceramic resonator
 Hand-free control