HT9020B -- Call Progress Tone Detector

General Description

The HT9020B call progress tone detector is a telecom peripheral for Auto-dialing system use.HT9020B 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. HT9020B 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, HT9020B ring-back tone and reorder tone.

Features

• Operating voltage: 2.5V to 5.5V
• Low power consumption
• Low cost 32768Hz crystal
• CPT Band: 305~640Hz detection
• Good performance:
  -8 ~ -39dBm at V_DD=2.5V
  0 ~ -27dBm at V_DD=5V
• 8-pin DIP package
• Data Sheet
• Revision History
• 封装信息
  8-pin DIP 封装
• 问答集
• Selection Guide
• 产品型号索引

HT9020B_中文PDF(点击下载)