Description
HA12179F is silicon monolithic bipolar IC providing Dolby noise reduction system*, line mute, music sensor and PB equalizer system in one chip.

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.

Functions
• Line mute × 2 channel
• PB equalizer × 2 channel
• Dolby B-NR × 2 channel
• Music sensor × 1 channel