HA12155NT PDF даташит
Спецификация HA12155NT изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «Audio Signal Processor for Cassette Deck (Dolby B/C-type NR with Recording System)». |
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Детали детали
Номер произв | HA12155NT |
Описание | Audio Signal Processor for Cassette Deck (Dolby B/C-type NR with Recording System) |
Производители | Hitachi Semiconductor |
логотип |
30 Pages
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HA12155NT/HA12157NT
Audio Signal Processor for Cassette Deck (Dolby B/C-type NR
with Recording System)
ADE-207-115C (Z)
4th Edition
June 1997
Description
HA12155NT/HA12157NT is silicon monolithic bipolar IC providing Dolby noise reduction system*,
electrical volume system, REC equalizer system and level meter system in one chip.
Functions
• REC equalizer
• Dolby B/C NR
• Electronic volume
• Level Meter
× 2 channel
× 2 channel
× 2 channel
× 2 channel
Features
• Inductor less REC equalizer is adjustable of its characteristics by external resistor
• Rec level is adjustable automatically with electrical volume which is built-in
• 3 type of input selection is available (one is by way of electrical volume)
• Separate input selection SW and REC/PB SW
• Dolby noise reduction with dubbing cassette decks
(Unprocessed signal output available from recording out terminals during PB mode)
• Log-compressed level meter output is range from 0 V to 5 V
(Usable as music search switchable gain of 0 dB and 20 dB respectivily)
• Normal-speed/high-speed (Double), normal/metal/chrome fully electronic control switching built-in
• NR-ON/OFF, Dolby B/C, MPX ON/OFF fully electronic control switching built-in
(Controllable from micro-controller directly)
• Reduction of number of pin by transfered serial data to electronic volume control switching and another
control switching
(Controllable from micro-controller directly)
• Low external parts count
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HA12155NT/HA12157NT
* Dolby is a trademark of Dolby Laboratories Licensing Corporation.
A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.
Ordering Information
Type
HA12155NT
HA12157NT
Package
DP-64S
Dolby Level
300 mVrms
Operating voltage
REC-OUT Level PB-OUT Level Min
Max
300 mVrms
580 mVrms
9.5 V
16 V
775 mVrms
12 V
16 V
Rev.4, Jun. 1997, page 2 of 57
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Block Diagram
HA12155NT/HA12157NT
Rev.4, Jun. 1997, page 3 of 57
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Номер в каталоге | Описание | Производители |
HA12155NT | Audio Signal Processor for Cassette Deck (Dolby B/C-type NR with Recording System) | Hitachi Semiconductor |
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