The MAX3293/MAX3294/MAX3295 are low-power, high-speed transmitters for RS-485/RS-422 communication that operate from a single +3.3V power supply. These devices contain one differential transmitter. The MAX3295 transmitter operates at data rates up to 20Mbps, with an output skew of less than 5ns, and a guaranteed driver propagation delay below 25ns. The MAX3293 (250kbps) and MAX3294 (2.5Mbps) are slew-rate limited to minimize EMI and reduce reflections caused by improperly terminated cables. The MAX3293/MAX3294/MAX3295 output level is guaranteed at +1.5V with a standard 54Ω load, compliant with RS-485 specifications. The transmitter draws 5mA of supply current when unloaded, and 1µA in low-power shutdown mode (DE = GND). Hot-swap circuitry eliminates false transitions on the data cable during circuit initialization or connection to a live backplane, and short-circuit current limiting and thermal-shutdown circuitry protect the driver against excessive power dissipation. The MAX3293/MAX3294/MAX3295 are offered in a 6-pin SOT23 package, and are specified over the automotive temperature range.
The MAX3293, MAX3294 and MAX3295 are low‑power, high‑speed RS‑485/RS‑422 transmitters that operate from a single +3.3 V supply. They are offered in a 6‑pin SOT23 package and are specified over the automotive temperature range (-40 °C to +125 °C). The devices include hot‑swap circuitry, current limiting and thermal‑shutdown protection.
Key features include slew‑rate limited operation for the MAX3293 (250 kbps) and MAX3294 (2.5 Mbps) to reduce EMI and reflections, and a high‑speed MAX3295 capable of up to 20 Mbps. All devices guarantee a differential output level of +1.5 V into a 54 Ω load and support a common‑mode input range of –7 V to +12 V.
| Supply Voltage (VCC) | 3.3 V ±5 % |
|---|---|
| Output Level (into 54 Ω) | +1.5 V |
| Common‑Mode Input Voltage Range | –7 V to +12 V |
| Package | 6‑pin SOT23 |
| Operating Temperature Range | –40 °C to +125 °C |
The MAX3295 can operate at data rates up to 20 Mbps.
All three devices are supplied in a 6‑pin SOT23 package.