Hitachi HA12179F
HA12179F is silicon monolithic bipolar IC providing Dolby noise reduction system*, line mute, music sensor and PB equalizer system in one chip.DESCRIPTION
Functions● Line mute
● PB equalizer
● Dolby B-NR
● Music sensor × 2 channel × 2 channel × 2 channel × 1 channel
FEATURES
● Different type of PB equalizer characteristics selection (normal/chrome or metal) is available with fully electronic control switching built-in.● Line mute ON/OFF is available.
● Changeable to Foward, Reverse-mode for PB head with fully electronic control switching built-in.
● Available to change music sensing level by external resistor.
● Music sensing level selection is available with fully electronic control switching built-in.
● Available to change frequency response of music sensor.
● NR-ON/OFF and REC/PB fully electronic control switching built-in.
● Pin compatible of HA12163 series except for 4 and 39 Pins. * Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC. HA12179F Ordering Information Package HA12179F QFP 56 PB-OUT level 387.5 mVrms REC OUT level 300 mVrms Dolby level 300 mVrms PB-OUT level above shown is typical value when adjusting Dolby level at Rec-out with NR-off mode.