HA12157NT中文資料日立數(shù)據(jù)手冊PDF規(guī)格書

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.

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