MAX488CPA

MAX488CPA is a Maxim Integrated (now Analog Devices) RS-485/RS-422 transceiver. It integrates a differential driver and receiver in one device, enabling robust serial communication over long, multi-point cables (RS-485) or four-wire RS-422 links.
How it works:
- DI is the TX data input; RO is the RX data output.
- DE enables the driver; RE enables the receiver (often RE is active-low).
- A and B are the differential bus lines.
- Supports standard RS-485/RS-422 signaling on a 5V supply with fast switching and suitability for multi-drop networks.
Key applications:
- Industrial automation, factory floor networks, building management, and long-distance sensor links.
Why use it:
- Simple two/ four-wire differential signaling, low power, and reliable fault tolerance on noisy lines, with a failsafe receiver that outputs a known logic level when the bus is idle or open.

MAX488CPA is a low‑power RS-485/RS-422 transceiver (half‑duplex). Common equivalents from other vendors include:
- Analog Devices: ADM485
- STMicroelectronics: SP3485
- NXP Semiconductors: PCA82C250
- Texas Instruments: SN65HVD178 (and other SN65HVD1x/SN65HVD2x families)
Note: check exact pinout, voltage range, and data-rate support to ensure compatibility.

Key features of MAX488CPA (RS-485/RS-422 transceiver):
- Half-duplex RS-485/RS-422 transceiver for 2-wire differential bus.
- Single-supply operation (5V).
- 1/8-unit-load receiver to allow multiple nodes on the bus.
- Separate driver enable (DE) and receiver enable (RE) for full 3-state control.
- Fail-safe receiver guarantees a logic-high output when inputs are open, shorted, or idle.
- Wide data-rate capability (suitable for standard RS-485 speeds, up to several Mbps).
- Robust bus protection with ESD/over-voltage protection on the bus pins.
- Small package (CPA) with low power/low quiescent current.
Note: For exact data-rate limits, supply current, and temperature range, please consult the official MAX488CPA datasheet.

- Pin count: 8 pins.
- Function: MAX488CPA is an RS-485/RS-422 transceiver (half‑duplex) with a single driver and receiver. Pins: DI (data in), RO (data out), DE (driver enable), /RE (receiver enable, active low), A, B, Vcc, GND. It drives the A/B bus and provides a RO output of the differential input, with DE and /RE controlling transmission and reception.

- Manufacturer: Maxim Integrated (now part of Analog Devices, Inc., ADI).
- What kind of company: A global semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (e.g., RS-485/RS-422 transceivers, op-amps, power-management ICs).

MAX488CPA is a low-power RS-485/RS-422 transceiver (half-duplex). Typical applications include:
- Industrial automation and process control networks (Modbus, Profibus, etc.)
- Building automation, HVAC and energy-management systems
- PLCs, remote I/O, data acquisition and instrumentation
- Remote telemetry, SCADA and data-logging over long cable runs
- Multi-point, long-distance serial networks in harsh environments
- Point-to-point or multi-drop RS-485/RS-422 links for rugged communications

8-pin DIP (DIP-8) package, through-hole.