HT9302B Datasheet PDF - Holtek Semiconductor

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 ofwhich are suitable for feature phone applications. HT9302G is simpler than HT9302X version. Itprovides only a redialing memory for simple low-cost system applications.

•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 SA memory dialing
•One-key redialing
•Pause and PT key for PBX
•44 keyboard matrix
•3.58MHz crystal or ceramic resonator