ROHM BA3714F

Audio ICs
1.5V signal sensor
BA3714F
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.
Applications
Tape end sensors for 1.5 to 3V headphone stereos
Mute and song selection sensors
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.
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions (Ta = 25C)
746
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.
Audio ICs
BA3714F
Block diagram
Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 1.25V)
747
Audio ICs
BA3714F
Measurement circuit
Timing chart
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Application example
Audio ICs
BA3714F
External dimensions (Units: mm)
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