MAX488ESA

MAX488ESA is a Maxim Integrated (now Analog Devices) low‑power, half‑duplex RS‑485/RS‑422 transceiver in an 8‑pin ESA package. It provides both a differential line driver (A/B) and a differential receiver, allowing a microcontroller to talk over twisted‑pair networks. Key pins: DI (data in), RO (data out), DE (driver enable), and /RE (receiver enable). It includes failsafe biasing so RO defaults to a known logic high when the bus is idle, open, or shorted. It operates from a single 5 V supply, supports low quiescent current, and offers a shutdown mode to reduce power when the transceiver is inactive. The ESA suffix refers to the packaging/temperature grade (lead‑free, small‑outline eight‑pin). Typical applications include industrial controls, building automation, data acquisition, and any RS‑485/RS‑422 multi‑point network.

Equivalent RS-485/RS-422 transceivers (8-pin, 1/8 unit load, 5 V):
- TI SN65HVD178 / SN65HVD178A
- Microchip MCP4851
- Analog Devices ADM485
- NXP P82B715
- NXP P82B96
- Onsemi NCV485
Note: Maxim MAX485/MAX487 are direct family relatives from the same vendor.

Pin count: 8 pins.
Function: An RS-485/RS-422 transceiver (half‑duplex) with driver and receiver. Pins include DI (data input to the driver), RO (receiver output), DE (driver enable), /RE (receiver enable, active low), A and B (differential bus lines), Vcc, and GND.

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

MAX488ESA is a low-power, 5V RS-485/RS-422 transceiver (half‑duplex) in an extended‑temperature variant. Key applications include:
- Industrial automation and process control (Modbus, multi‑drop RS‑485)
- Remote sensing, telemetry, and data acquisition over long distances
- Building automation and energy/meters networks (HVAC, lighting)
- Instrumentation and measurement equipment in noisy environments
- Any RS-485/RS-422 link requiring robust, single‑supply operation and extended temperature range

MAX488ESA uses an 8-pin SOIC (small-outline) package.