Datasheet > HT9020B(8SOP-A)

HT9020B(8SOP-A)

更新时间： 2024-01-04 11:02:01

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HT9020B(8SOP-A) 数据手册

HT9020B

Call Progress Tone Detector

Features

Operating voltage: 2.5V~5.5V

Good performance:

-8 ~ -39 dBm at V_DD=2.5V

0 ~ -27 dBm at V_DD=5V

Low power consumption

Low cost 32768Hz crystal

8-pin DIP/SOP packages

CPT Band: 305~640Hz detection

General Description

The HT9020B call progress tone detector is a telecom

peripheral for Auto-dialing system use.

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.

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.

Block Diagram

Pin Assignment

Rev. 1.31

February 20, 2009

12 3 4 5 6 7...10

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