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| 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. FApplications Tape end sensors for 1.5 to 3V headphone stereos Mute and song selection sensors FFeatures 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. FAbsolute maximum ratings (Ta = 25_C) 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. FRecommended operating conditions (Ta = 25_C) 746 Audio ICs FBlock diagram BA3714F FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 1.25V) 747 Audio ICs FMeasurement circuit BA3714F FTiming chart FApplication example 748 Audio ICs FExternal dimensions (Units: mm) BA3714F 749 |
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