The SN65LBC171 and SN75LBC171 are monolithic integrated circuits designed for bidirectional data communication on multipoint bus-transmission lines. Potential applications include serial or parallel data transmission, cabled peripheral buses with twin axial, ribbon, or twisted-pair cabling. These devices are suitable for FAST–20 SCSI and can transmit or receive data pulses as short as 25 ns, with skew less than 3 ns. These devices combine three 3-state differential line drivers and three differential input line receivers, all of which operate from a single 5-V power supply. The driver differential outputs and the receiver differential inputs are connected internally to form three differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus whenever
The SN65LBC171 and SN75LBC171 are monolithic integrated circuits that provide three differential line drivers and three differential receivers in a single 5‑V powered device. They support bidirectional data communication on multipoint bus lines such as TIA/EIA‑485, TIA/EIA‑422, ISO‑I‑RQ1 and ANSI‑X3.277, with signaling rates up to 30 Mbps and driver output currents up to +60 mA.
The devices are offered in shrink small‑outline (SSOP) and small‑outline (SOIC) packages, feature ESD protection exceeding 12 kV, and include thermal shutdown protection. Operating temperature ranges differ: SN65LBC171 operates from –40 °C to 85 °C, while SN75LBC171 operates from 0 °C to 70 °C.
| Signaling rate | Up to 30 Mbps |
|---|---|
| Driver output current | Up to +60 mA |
| Recommended supply voltage (Voc) | 4.75 V to 5.25 V (typical 5 V) |
| ESD protection | Exceeds 12 kV |
The devices support signaling rates up to 30 Mbps.
A supply voltage of 5 V is recommended, with a typical range of 4.75 V to 5.25 V.