Datasheet Details
| Part number | HT9020B |
|---|---|
| Manufacturer | Holtek Semiconductor |
| File Size | 145.26 KB |
| Description | Call Progress Tone Detector |
| Datasheet | HT9020B_HoltekSemiconductor.pdf |
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Overview: .. HT9020B Call Progress Tone Detector.
| Part number | HT9020B |
|---|---|
| Manufacturer | Holtek Semiconductor |
| File Size | 145.26 KB |
| Description | Call Progress Tone Detector |
| Datasheet | HT9020B_HoltekSemiconductor.pdf |
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The HT9020B call progress tone detector is a tele peripheral for Auto-dialing system use.
Switched capacitors technology is implemented into the chip to get good performance characteristics of band pass filter in the range of 305 to 640Hz call progress tone which is dual tone multi-frequency signal.
When it detected CPT signal then it generates relative envelopes for external microcontroller decision to finish different kinds of CPT signal detection such as dial tone, busy tone, ring-back tone and reorder tone.
| Part Number | Description |
|---|---|
| HT9020 | Call Progress Tone Decoder & ABR Controller |
| HT9142 | FM IF Detector |
| HT9172 | DTMF Receiver |
| HT9201A | (HT9201A/B) Simple Tone Dialer |
| HT9201B | (HT9201A/B) Simple Tone Dialer |
| HT9205A | 5-Memory/6-Memory Tone/Pulse Dialer |
| HT9205B | 5-Memory/6-Memory Tone/Pulse Dialer |
| HT9205C | 5-Memory/6-Memory Tone/Pulse Dialer |
| HT9205D | 5-Memory/6-Memory Tone/Pulse Dialer |
| HT9205K | 5-Memory/6-Memory Tone/Pulse Dialer |