The MAX3483E family (MAX3483E/MAX3485E/ MAX3486E/MAX3488E/MAX3490E/MAX3491E) are ±15kV ESD-protected, +3.3V, low-power transceivers for RS-485 and RS-422 communications.
The MAX3483E‑MAX3491E family are 3.3 V powered, +15 kV ESD‑protected RS‑485/RS‑422 transceivers. Each device contains a driver and a receiver, with the MAX3488E, MAX3490E and MAX3491E offering full‑duplex operation and the others half‑duplex. Slew‑rate‑limited versions reduce EMI and reflections for reliable communication up to 250 kbps, while other models support up to 12 Mbps.
The datasheet provides absolute maximum ratings, DC electrical characteristics, driver and receiver switching parameters, ordering information, and typical application circuits. Pin configurations for SO and DIP packages are shown, along with example RS‑485 network layouts for both half‑ and full‑duplex devices.
| Maximum Data Rate | 12 Mbps (MAX3485E, MAX3490E, MAX3491E) |
|---|---|
| Supply Voltage Range (VCC) | 3.0 V to 3.6 V |
| ESD Protection | +15 kV HBM, +8 kV IEC contact, +15 kV IEC air‑gap |
| Input High Voltage (VIH) | 2.0 V |
| Input Low Voltage (VIL) | 0.8 V |
The MAX3485E supports a maximum data rate of 12 Mbps.
They operate from 3.0 V to 3.6 V supply voltage.
The devices are protected to +15 kV Human Body Model, +8 kV IEC contact discharge, and +15 kV IEC air‑gap discharge.
MAX3488E, MAX3490E and MAX3491E are full‑duplex; the other members of the family are half‑duplex.