MAX485EESA+

MAX485EESA+ is Maxim’s low‑power, half‑duplex RS‑485 transceiver (driver + receiver) for multi‑point networks. It converts TTL/CMOS logic to a differential RS‑485 pair (A/B) and back, enabling long‑distance, multi‑node serial links.
Key points
- 1/8 unit‑load driver; supports many nodes on one bus
- Fail‑safe receiver: RO stays high when inputs are open, shorted, or idle
- DE/RE control for driver enable and receiver enable
- Data rate up to ~2.5 Mbps on a single supply
- Single 5V supply (typical 4.75–5.25V); extended temperature/lead‑free variant (EESA+)
Pinout basics: DI, RO, DE, RE, A, B, VCC, GND. Typical applications: industrial automation, building automation, HVAC, and other RS‑485 networks.
Note: exact electrical specs, timing, and packaging are in the MAX485EESA+ datasheet.

Possible drop-in equivalents to MAX485EESA+ (8-pin RS-485/RS-422 half‑duplex transceivers):
- TI SN65HVD1780 (and related variants)
- Microchip MCP4851 / MCP4852
- Analog Devices ADM485
- STMicroelectronics SP3485 (and related)
- Maxim MAX487 (and MAX485)
Note: check voltage range, speed, and package/temperature grading for exact compatibility.

Here are the typical features of the MAX485EESA+ (RS-485/RS-422 transceiver):
- Half-duplex RS-485/RS-422 transceiver
- Single-supply operation: 4.75 V to 5.25 V
- Up to 2.5 Mbps data rate
- 1/8 unit load on the bus (supports up to 32 nodes)
- Fail-safe receiver: RO remains high when A and B are open, shorted, or idle
- Separate driver enable (DE) and receiver enable (RE) pins for easy direction control
- DI and RO are TTL/CMOS-compatible
- Fully integrated driver and receiver (no external components required)
- Bus-pin ESD/transient protection
- Low power consumption and suitable for battery/multi-drop networks
- Available in common 8-pin packages (DIP, SOIC, MSOP), with industrial-temperature variants available
Note: exact temperature range and packaging options may vary by specific part/package.

MAX485EESA+ is an 8-pin RS-485/RS-422 transceiver (package: 8-pin surface-mount, e.g., SOIC/SSOP).
Pinout (8 pins):
- 1: RO — Receiver Output
- 2: RE\ — Receiver Enable (active low)
- 3: DE — Driver Enable
- 4: DI — Driver Input
- 5: GND — Ground
- 6: B — RS-485 bus line B
- 7: A — RS-485 bus line A
- 8: VCC — Supply voltage (Typically 4.75–5.25 V)
Characteristics: Half-duplex RS-485 transceiver with one driver and one receiver.

- Manufacturer: Maxim Integrated Products, Inc. (now a part of Analog Devices, Inc.)
- What kind of company: An American semiconductor company that designs, manufactures, and markets analog and mixed-signal integrated circuits.

MAX485EESA+ is a low-power RS-485/RS-422 transceiver suited for industrial and building automation and any two-wire half‑duplex RS‑485 network. Typical applications include:
- Industrial automation: PLCs, remote I/O, motor controllers, distributed control
- Building automation: HVAC, lighting, security, metering networks
- Data acquisition/telemetry: remote sensors, SCADA gateways
- Multi-drop/long-distance RS‑485 networks in noisy environments
- Instrumentation and test equipment: data loggers, meters
- Smart grid and energy monitoring
Operates over extended temperature (-40°C to +125°C) for harsh environments.

8-pin SOIC (Small Outline Integrated Circuit) package.