BA7755A Datasheet - Rohm

BA7755A High-voltage audio head selection switch

Video ICs High-voltage audio head selection switch BA7755A / BA7755AF The standard audio circuits of video cassette recorders and the recording circuits of tape decks use AC bias recording to record the audio signal onto the tape. This bias voltage is some tens of volts, and a high-capacity bias-side switch is required to electronically switch the head when in playback or record mode. The BA7755A and BA7755AF are high-voltage switching ICs designed to switch voltages as high as ± 65VDC or AC120.

BA7755A Features

* 1) High withstanding voltage ( ± 65V DC (Min.), AC120VP-P (Min.), f = 70Hz). 2) Circuits for either current control or voltage control are provided on the chip. 3) Compact SIP 5pin or SOP 8pin package.

* Block diagram BA7755A 1 VCC 2 SW 3 4 5 GND CTRL2 CTRL1 BA7755AF CTRL1

BA7755A_Rohm.pdf