The BA3641FV is an option IC developed for the purpose of adding a recording function to 1-chip playback system ICs (BA3612AKV, etc.) for headphone stereos.

FEATUREs
1) Two built-in microphone amplifier channels.
2) Microphone mute function (radio / microphone switching).
3) Two built-in recording amplifier channels (with ALC).
4) Two built-in monitor output amplifier channels (radio/microphone switching).
5) Built-in regulators for the erase head and bias OSC circuit.

APPLICATIONs
    Headphone stereos with recording function