Holtek Semiconductor
22-Memory Tone/Pulse Dialer
Holtek Semiconductor
TinyPower™ Operation Amplifier
Holtek Semiconductor
Call Progress Tone Decoder & ABR Controller
Holtek Semiconductor
15-Memory Tone/Pulse Dialer
Holtek Semiconductor
Low Voltage Operational Amplifiers
Holtek Semiconductor
15-Memory Tone/Pulse Dialer
Holtek Semiconductor
8-Bit Numerical Pager Controller MCU
Holtek Semiconductor
DTMF Generators