The BA3714F is a signal sensor consisting of a sensor circuit which detects the presence of an input signal, a logic circuit which controls an output drive circuit based on the input signal, and an output drive circuit. The signal sensor circuit employs the dual-wave rectified current method for excellent response.

The outputs TE of Pin 3 and TON of Pin 5 can be respectively set by choosing appropriate values for the capacitor between Pin 7 and VCC and the capacitor between Pin 1 and ground.

Drive outputs include two systems OUT1 and OUT which are controlled by the logic block. These systems can be combined to enable a wide range of designs.

Features

1) Operation possible at ultra-low voltages. (VCC = 0.8 to 4.5V)

2) Minimal attached components.

3) Uses dual rectified current method for excellent signal response.

4) Very low current dissipation. (IQ = 0.9mA)

5) When used for a tape end sensor, can also be used with mechanical auto-off.

6) SOP 8-pin package allows space conservation on the board.

Applications

Tape end sensors for 1.5 to 3V headphone stereos

Mute and song selection sensors