MAX485EESA

The MAX485EESA is a low-power RS-485/RS-422 transceiver (8-pin package) from Maxim (now Analog Devices) designed for half‑duplex serial communication over differential A/B lines.
Key points:
- Single 5V supply, 1/8 unit load, supports multi-node networks.
- Data rate up to 2.5 Mbps.
- DI (data input), RO (receiver output), DE (driver enable), /RE (receiver enable) control; A and B are the differential bus lines.
- Receiver offers failsafe: RO goes high if the bus is idle, open, or shorted.
- EESA package denotes the RoHS-compliant, small 8-pin package variant.
Typical use:
- Industrial controls, Modbus RTU, PLCs, remote sensing, and other 5V RS-485 networks.
Why choose:
- Simple, low-power, robust half‑duplex transceiver with easy interface and bus failsafe for reliable multi-point communication.

MAX485EESA is a 5V, 1/8‑unit‑load, half‑duplex RS‑485 transceiver. Common equivalents from other vendors include: TI SN65HVD1780/1781 (RS‑485 transceivers), Analog Devices ADM485, STMicroelectronics ST485, Renesas/Exar SP3485, and Maxim MAX3485. Verify package, speed, fail‑safe and 3‑state pins for your design.

Here are the typical features of the MAX485EESA RS-485/RS-422 transceiver:
- Half-duplex RS-485/RS-422 transceiver
- Single 5V supply
- 1/8 unit load on the bus
- Data rate up to about 2.5 Mbps
- On-chip failsafe receiver: RO goes high if inputs are open, shorted, or idle
- Separate control pins: DE (driver enable) and /RE (receiver enable) for easy direction control
- Wide bus common-mode range (-7V to +12V)
- Built-in protection and ESD robustness on bus pins
- Low power operation
- Industrial temperature range: typically -40°C to +85°C
- 8-pin package (RoHS-compliant) suitable for standard PCB layouts
Note: exact specs can vary by package/revision; consult the MAX485EESA datasheet for precise numbers.

- Pin count: 8 pins (8-pin package).
- Function: Low-power RS-485/RS-422 transceiver (half‑duplex) with one driver and one receiver. Pins include DI (Driver Input), RO (Receiver Output), DE (Driver Enable), /RE (Receiver Enable, active-low), A and B (bus lines), Vcc, and GND. Typically supports up to ~2.5 Mbps at 5V.

The MAX485EESA is manufactured by Maxim Integrated. Maxim is a semiconductor company that designs and markets analog and mixed-signal integrated circuits (fabless). In 2021, Maxim Integrated was acquired by Analog Devices, making it part of a global analog/mixed-signal IC company.

MAX485EESA is a low-power, half-duplex RS-485 transceiver. Typical applications:
- Industrial automation (PLC I/O, remote sensors)
- Building automation (HVAC, lighting, security)
- Data acquisition and telemetry (remote monitoring, sensor networks)
- RS-485 multipoint fieldbus (SCADA/RTU, instrumentation)
- DMX512 lighting and entertainment networks
- Point-to-point or multipoint RS-485 links in harsh electrical environments

8-pin Small-Outline IC (SOIC) package, lead-free/RoHS-compliant.