Description
HA12216F/HA12221F series are silicon monolithic bipolar IC providing Dolby B type noise reduction, music sensor, PB equalizer system in one chip.

FEATUREs
• Different type of PB equalizer characteristics selection (120 µs/70 µs) is available with fully electronic control switching built-in.
• Changeable to Forward, Reverse-mode for PB head with fully electronic control switching built-in.
• Available to change music sensing level by external resistor.
• Available to change response of music sensor by external capacitor.
• Music sensing level, built-in switch to change a band (MSGV).
• NR ON/OFF fully electronic control switching built-in. (Only HA12216F series)
• Line mute (Tape radio) control switching built-in.
• Available to connect direct with MPU.
• These ICs are strong for a cellular phone noise. (18 dB improvement from HA12163)

Functions
• PB equalizer × 2 channel
• Music sensor × 1 channel
• Dolby B NR (Only HA12216F series) × 2 channel
• Line mute (Tape radio) SW × 2 channel