MAX485CPA

MAX485CPA is a low‑power, half‑duplex RS-485/RS-422 transceiver from Maxim Integrated (now Analog Devices). It combines a differential driver and a receiver in an 8‑pin package, letting a microcontroller talk to a multi‑point RS‑485 network over twisted pair.
Key points:
- Single‑supply operation, differential A/B lines, DI/RO with DE/RE for direction control.
- 1/8 unit‑load driver, allowing many nodes on one bus; typical data rate up to ~2.5 Mbps on short runs.
- Failsafe receiver: RO outputs a logic high when the bus is idle, open, or shorted.
- Suitable for industrial/building automation, data acquisition, and remote sensor networks.
Note: CPA is a suffix indicating a specific packaging/temperature variant; check the datasheet for exact voltage, temp range, and package details for your application.

Common drop-in equivalents to MAX485CPA (RS-485/RS-422, 5V, half‑duplex):
- TI SN65HVD178(A)
- Analog Devices ADM485
- ST SP485 (and SP487)
- Maxim MAX487 (and MAX3485)
- Microchip MCP4851 (and MCP4852)

Key features of MAX485CPA (low-power RS-485/RS-422 transceiver):
- Half-duplex RS-485 and RS-422 interface
- 5V single-supply operation (4.75V–5.25V)
- 1/8 unit load on the bus
- Data rate up to 2.5 Mbps
- Independent driver enable (DE) and receiver enable (/RE) controls
- Fail-safe receiver: RO rises high with idle/open/shorted inputs
- Robust protection on bus pins (ESD protection)
- Low power consumption and compatible input/output levels
- 8-pin package variants available (e.g., DIP/SOIC) for easy integration
Note: For exact temperature range and current specs, consult the datasheet for the CPA variant you’re using.

- Pin count: 8 pins (8-pin package such as SOIC/DIP).
- Function: RS-485/RS-422 transceiver (half-duplex) with integrated driver and receiver. Pins: A, B (bus); DI (driver input); RO (receiver output); DE (driver enable); RE (receiver enable, active-low); Vcc and GND. Converts between TTL/CMOS UART and differential RS-485/RS-422 signals.

Manufacturer: Maxim Integrated (Maxim Integrated Products, LLC), now part of Analog Devices after a 2020 acquisition.
What kind of company: A semiconductor company that designs and markets analog and mixed-signal integrated circuits ( ICs ).

Max485CPA is a low‑power, half‑duplex RS‑485/RS‑422 transceiver for robust multi‑point serial communication. Typical application areas:
- Industrial automation and factory floor networks
- Building automation (HVAC, lighting, security) and smart sensors
- Remote telemetry and data acquisition (energy, water, gas metering)
- PLCs, remote I/O, and instrumentation links
- Security and access-control networks
- Long-distance, multi‑drop RS‑485 links in noisy environments

MAX485CPA is in an 8-pin small-outline package (SOIC-8).