This design note provides information concerning the designing of TIA/EIA-232-F interface circuits. The TIA/EIA-232-F standard is covered including the electrical specification, maximum cable lengths, and the DB9S connector. The section entitled Optimizing PC Interface Devices discusses the following topics: SN75C185 power considerations, interface power-consumption calculations, the SN75LP185A and SN75LPE185 devices, on-chip slew rate limiting, and internal noise filtering.
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