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TSOP75D25 Datasheet(PDF) 6 Page - Vishay Siliconix |
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TSOP75D25 Datasheet(HTML) 6 Page - Vishay Siliconix |
6 / 14 page www.vishay.com Document Number: 83311 6 Rev. 1.0, 31-Mar-10 TSOP75D25 Vishay Semiconductors IR Receiver Modules for 3D Synchronization Signals STAND-BY MODE OF THE TSOP75D25 If an application requires an ultra low average supply current in order to save battery life, the TSOP75D25 can be operated with an intermittent supply voltage. A typical application circuit shown in fig. 17. Fig. 17 - Application Circuit for the TSOP75D25 with Intermittent Supply Voltage To receive a continuous data signal while using the TSOP75D25 with an intermittent supply voltage, the receiver must be activated in advance of the expected data frame as shown in figure 18. Fig. 18 - Signal Timing in Power Saving Mode with Continuous Receiving Function In normal operation without using the stand-by feature, the gain level of the TSOP75D25 returns to a default level after the device is disconnected from supply voltage and reconnected again. A settling time of up to 100 ms is necessary until the gain has settled to an optimum level that is well matched to the ambient noise level. Using the device in stand-by mode, the TSOP75D25 memorizes its gain setting while in standby. On re-activation, the gain immediately returns to the correct level present before stand-by. This operation insures that there are no spurious pulses on power-up due to mismatch between the gain level and the ambient light conditions. Low Power Microcontroller IR Receiver (memorizing the gain level during standby) Input RC data Output IR Rec. SBY other input and output lines TSOP75D.. Battery Supply V S = 2.5 V to 5.5 V R S 3 M Ω 22023-2 Output signal of the microcontroller to control the standby mode of the IR Receiver The transmitted IR synchronizing pattern The standby is deactivated in advance of the expected data frame Output signal of the TSOP75D25 Standby off Standby on valid sync. pattern Synchronizing pattern, sent by the TV Data is valid only 2 ms after the standby off signal 22024-2 |
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