| Pin No | Function | Interal Circuit | DC Voltage | Description |
| 16 | EXT Vcc | | | External power supply with current limiter Capable of providing at least 4 V when an output current is 25 mA. Whn the output voltage is O V, the ouput currem is tess than 25 mA. |
| 17 | HPF DET | | | Detecls the lewl used t0 1urn th high-pass filter on and ofi. |
| 18 | BIAS | L 1 | 2.1 V | Refereoce voltage |
| | EXT MIC mono | | | Outputs a low level only when the external microphon is monophonic. |
| 28 36 | Mic AMP out | | 2.1 V | Microphone amplitiar output This is a low-impedance output. |
| 29 | Input setect CTL2 | c 30k J 100k | | Internal/external switch Contro! pin used to determme stereo or monophonic operation |
| | | | |
* This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maxi mum rating conditions for extended periods of time may affect reliability.
