Texas Instruments provides a recommended PCB layout in the application note SLVAE04, which includes guidelines for trace routing, component placement, and decoupling to minimize EMI and ensure signal integrity.
The termination resistors should be chosen based on the transmission line impedance and the signal frequency. A general rule of thumb is to use 50-ohm resistors for high-speed signals and 100-ohm resistors for low-speed signals. The datasheet provides more information on termination resistor selection.
The maximum cable length supported by the SN75LBC174ADW depends on the signal frequency, cable type, and transmission line impedance. As a general guideline, the maximum cable length for a 100-MHz signal is around 10 meters, but this can vary depending on the specific application. It's recommended to consult the datasheet and perform signal integrity simulations to determine the maximum cable length for a specific design.
The SN75LBC174ADW requires a 3.3-V or 5-V power supply, and it's recommended to use a low-ESR capacitor (e.g., 0.1 μF) for decoupling. The power supply should be able to provide enough current to support the device's operating current, which is typically around 10 mA. It's also recommended to use a separate power plane for the device and to avoid sharing the power supply with other devices.
The main difference between the SN75LBC174ADW and the SN75LBC174DW is the package type. The SN75LBC174ADW is available in a 20-pin SOIC package, while the SN75LBC174DW is available in a 20-pin TSSOP package. Both devices have the same electrical characteristics and functionality.
SN75LBC174ADW datasheet
by Texas Instruments
