The DS90C differential line driver is a. The charges for such cases will be worked out on pro-rata basis. The authority of the person signing the tender, if called for should be produced. Such inspection, examination and testing shall not release the contract or from the obligations under this contract.

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LVDS drivers and receivers are intended to be primarily used in an uncomplicated point-to-point configuration as is shown in Figure 6. This configuration provides a clean signaling en- vironment for the quick edge rates of the drivers. The re- ceiver is connected to the driver through a balanced media which may be a standard twisted pair cable, a parallel pair cable, or simply PCB traces.

The termination resistor converts the current sourced by the driver into a voltage that is detected by the receiver. Other configurations are possible such as a multi-receiver configu- ration, but the effects of a mid-stream connector s , cable stub s , and other impedance discontinuities as well as ground shifting, noise margin limits, and total termination loading must be taken into account. The DS90C differential line driver is a balanced current source design.

A current mode driver, generally speaking has a high output impedance and supplies a constant cur- rent for a range of loads a voltage mode driver on the other hand supplies a constant voltage for a range of loads. Cur- rent is switched through the load in one direction to produce a logic state and in the other direction to produce the other logic state. The typical output current is mere 3.

The current mode requires as discussed above that a resistive termi- nation be employed to terminate the signal and to complete the loop as shown in Figure 6.

AC or unterminated configu- rations are not allowed. The 3. The current mode driver provides substantial benefits over voltage mode drivers, such as an RS driver. Its quies- cent current remains relatively flat versus switching fre- quency. This is due to the overlap current that flows between the rails of the device when the internal gates switch. Whereas the cur- rent mode driver switches a fixed current between its output without any substantial overlap current.

AC specifica- tions for the driver are a tenfold improvement over other ex- isting RS drivers. The TRI-STATE function allows the driver outputs to be dis- abled, thus obtaining an even lower power state when the transmission of data is not required.






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