MAX3291/MAX3292 are high-speed RS-485/RS-422 transceivers from Maxim Integrated Products. They feature driver preemphasis circuitry, which extends the distance and increases the data rate of reliable communication by reducing intersymbol interference (ISI) caused by long cables.
The MAX3291 and MAX3292 are full‑duplex RS‑485/RS‑422 transceivers that operate from a single +5 V supply. They feature driver pre‑emphasis circuitry to extend communication distance and increase data rates, a low‑current shutdown mode (100 nA), and fail‑safe receiver inputs. Both devices support up to 128 transceivers on a single bus.
The document provides absolute maximum ratings, detailed DC electrical characteristics, switching characteristics, pin descriptions, and package information for the 14‑pin SOIC and DIP variants. Ordering information and mechanical dimensions are also included.
| Data Rate (MAX3291) | 5 Mbps to 10 Mbps |
|---|---|
| Data Rate (MAX3292) | Programmable up to 10 Mbps |
| Low‑Current Shutdown Mode | 100 nA |
| Maximum Number of Transceivers on Bus | 128 |
| Supply Voltage Range | +5 V to +12 V (common‑mode) |
The MAX3292 can be programmed for data rates up to 10 Mbps.
Up to 128 transceivers can be connected to the bus.
Both devices have a low‑current shutdown mode that reduces supply current to 100 nA.
The common‑mode input voltage range is –7 V to +12 V.