Key facts
- Brand
- Maxim
- Model
- MAX3291
- Documents
- 3
- Languages
- EN
- Last added
- 2012-05-08
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Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet
The MAX3291 and MAX3292 are high‑speed RS‑485/RS‑422 transceivers that feature driver pre‑emphasis circuitry to extend communication distance and increase data rates by reducing intersymbol interference. Both devices operate from a single +5 V supply, support full‑duplex operation, and include a low‑current shutdown mode.
Key specifications include programmable data rates (5 Mbps‑10 Mbps for MAX3291, up to 10 Mbps for MAX3292), a 1/4‑unit‑load receiver input that permits up to 128 devices on a bus, a common‑mode input range of –7 V to +12 V, and short‑circuit current limiting on the driver outputs. The datasheet provides detailed pin descriptions, electrical ratings, and typical performance graphs.
Maxim MAX3291 specifications
| Data rate (MAX3291) | 5 Mbps to 10 Mbps |
|---|---|
| Data rate (MAX3292) | up to 10 Mbps |
| Supply voltage | +5 V (typical) |
| Low‑current shutdown current | 100 nA |
| Receiver input impedance | 1/4‑unit load, supports up to 128 transceivers |
| Common‑mode input voltage range | -7 V to +12 V |
Source: Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet
All Maxim MAX3291 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What does the pre‑emphasis feature do?
It extends the communication distance and increases the data rate by reducing intersymbol interference caused by long cables.
From: Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet
How many transceivers can be placed on a single RS‑485/RS‑422 bus?
Up to 128 transceivers can be connected because the receiver input is a 1/4‑unit load.
From: Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet
What is the maximum data rate for the MAX3291?
The MAX3291 supports data rates from 5 Mbps up to 10 Mbps.
From: Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet
How many transceivers can be placed on a single RS‑485/RS‑422 bus?
Up to 128 transceivers can be connected on the bus.
From: Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet
What is the maximum data rate of the MAX3292?
The MAX3292 can be programmed for data rates up to 10 Mbps.
From: Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet
How many transceivers can be placed on a single RS‑485/RS‑422 bus?
Up to 128 transceivers can be connected to the bus.
From: Maxim MAX3291/MAX3292 RS-485/RS-422 Transceiver Datasheet