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HT9020B Datenblatt(PDF) 2 Page - Holtek Semiconductor Inc

Teilenummer HT9020B
Bauteilbeschribung  Call Progress Tone Decoder & ABR Controller
PDF  12 Pages
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Hersteller  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT9020B Datenblatt(HTML) 2 Page - Holtek Semiconductor Inc

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Block Diagram
Pin Assignment
Pin Description
Pin Name
I/O
Internal
Connection
Description
DEC/ABRC
I
CMOS IN
When this pin is connected to VDD, the chip is in the call
progress tone decoder mode (
CPTD mode)
When this pin is connected to VSS, the chip is in the auto busy
redial controller mode (
ABRC mode)
OE/HKOFF
I
CMOS IN
CPTD mode: DIAL, RBK, BUSY and ENV pin tristate output
control pin. OE=VDD: Tristate output selected
ABRC mode: Off hook sense pin
HKOFF=VDD: Reset controller and disable ABR operation
HT9020
2
21st Aug ’98



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