HA12203NT Datasheet | Hitachi Semiconductor

Description HA12203NT is silicon monolithic bipolar IC providing Dolby noise reduction system- , music sensor system, REC equalizer system and each electronic control switch in one chip. Note: 1. Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC. Functions - Dolby B - NR- - REC equalizer - Music sensor - Pass amp. × 2 channel × 2 channel × 1 channel × 2 channel - Each electronic control switch to change REC equalizer, bias, etc. Note: 2. HA12204NT is not built-in Dolby noise reduction system. Features - REC equalizer is very small number of external parts and have 6 types of frequency characteristics 3 built-in.- - 2 types of input for PB, 1 type of input for REC. - 70µ - PB equalizer changing system built-in. - Dolby NR with dubbing double cassette decks. Unprocessed signal output available from recording out terminals during PB mode. - Provide stable music sensor system, available to design music sensing time and level. - Controllable from direct micro-puter output. - Bias oscillator control switch built-in. - NR ON / OFF and REC / PB fully electronic control switching built-in. - Normal-speed / high-speed, Normal / Crom / Metal- and PB equalizer fully electronic control switching built-in. - Available to reduce substrate-area because of high integration and small external parts. HA12203NT/HA12204NT Note: 3. HA12204NT have 4 types of frequency characteristics. Ordering Information Standard Level PB-OUT Product HA12203NT HA12204NT Package DP-42S Level 580m Vrms REC-OUT Level 300m Vrms Dolby Level 300m Vrms - Operating Voltage Range VCC (V) +6.0 to +7.5 VEE (V) - 7.5 to - 6.0 Note | VCC + VEE | < 1.0V Function Dolby B-NR ! Music Sensor ! ! Product HA12203NT HA12204NT REC-EQ ! ! Pass Amp. ! ! REC / PB ! ! Selection !...