HT9020B Holtek, HT9020B Datasheet

HT9020B

Manufacturer Part Number

HT9020B

Description

DIP-8

Manufacturer

Holtek

Datasheets

1.HT9020B.pdf (10 pages)

2.HT9020B.pdf (7 pages)

Specifications of HT9020B

Date_code

02+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

HT9020B

Manufacturer:

HOLTEK/合泰

Quantity:

20 000

Company:

H&T Electronics

Part Number:

HT9020B

Quantity:

900

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Download datasheet (121Kb)

Features

General Description

The HT9020B call progress tone detector is a telecom

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.

Block Diagram

Pin Assignment

Rev. 1.20

Operating voltage: 2.5V~5.5V

Low power consumption

Low cost 32768Hz crystal

CPT Band: 305~640Hz detection

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.

Good performance:

0 ~ 27 dBm at V

8-pin DIP package

Call Progress Tone Detector

8 ~ 39 dBm at V

=5V

=2.5V

HT9020B

March 31, 2003

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