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| LFBK0603HS220-T资料 | |
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LFBK0603HS220-T PDF Download |
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File Size : 116 KB
Manufacturer: Description:transmission line with other RS-232 devices which are not powered by the same power supplies, it is possible that a device that is not powered will have a low impedance path to ground at its driver output. The RS-232 stan- dards require that with no power applied to the device, the impedance from a transmitter output to ground must be greater than 300Ω. This can be easily achieved as shown in Figure 1a, where an external transistor is used as a switch to isolate an SP304 from ground in the power off condition. With VDD turned on, the transistor switch is on, connecting ground (GND) for the device to the circuit ground. In a power-off condition, this transistor is switched off, thus isolating the unit from circuit ground, and thereby leaving the driver in a high impedance state. Multiple SP304s can be connected as shown in Figure 1b. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：LFBK0603HS220-T 厂 家： 封 装：08＋ 批 号：289000 数 量： 说 明：原装现货 |
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