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2SD965

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File Size : 116 KB Manufacturer:UTC Description: In the intended application, it is expected that the transmitter will spend a large proportion of time in stand by not transmitting data. To maximise battery life it is important that very little quiescent current is taken in this mode. The stand by mode is selected by setting pin TXEN low and similarly the transmitter is enabled by setting TXEN high. To minimize standCby current TXEN is used to bias an onC chip npn transistor connected in a common collector configuration (Figure 3 below). This transistor is used to provide the supply to large portions of the IC. Collapsing the supply when TXEN is set low results in a very low stand by current. The voltage on TXEN should not exceed VCC by more than 0.2Volts. From an application standpoint the TXEN pin must be able to source the bias current for the input transistor and should also be decoupled if possible to prevent high frequency noise directly coupling into the IC power supply. The value of the decoupling capacitors and the drive capability of the TXEN source will affect power up delay. Since TXEN enables the PLL it is therefore essential that it is set high prior to any data transmission and that it remains high during the transmission.Therefore three different power drain modes are possible

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型号：2SD965 厂家：UTC 封装：SOT89 批号：08+ 数量：12000 说明：绝对全新原装大量现货，质量保证，欢迎来电查询


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