MAX1487CPA

MAX1487CPA is a Maxim Integrated (now Analog Devices) differential line transceiver for RS-485/RS-422 networks. It provides a driver and receiver pair that lets a microcontroller interface with a differential bus, with features such as:
- controllable driver enable and receiver enable
- fail-safe receiver output
- ESD/overload protection
- suitable for 3.3 V or 5 V logic supplies and typical high-speed differential communication (data rates depending on variant)
- low power in idle mode
- available in CPA lead-free/package options
Common applications include industrial control networks, data-acquisition systems, and other mixed-signal microcontroller-to-bus interfaces. For exact pinout, electrical specs, and timing, consult the MAX1487CPA datasheet for the specific package and voltage version you’re using.

Here are the typical features of the MAX1487CPA (RS-485/RS-422 transceiver with isolation):
- Isolated transceiver: RS-485/RS-422 bus-side isolated from logic-side circuitry.
- IsoPower option: integrated isolated supply to power the bus side (fewer external parts).
- High isolation rating: suitable for galvanic isolation between logic and bus.
- Data rate: supports up to several Mbps (typical max around 5 Mbps, depending on config).
- Half-duplex RS-485 and RS-422 compatibility (bus-driven transceiver).
- Flexible logic interface: TTL/CMOS-compatible input signals; logic supply tolerant to common 3.3V/5V levels.
- Direction control: DE/RE-style control with fail-safe / receiver enable.
- Robust protection: ESD and fault protection on bus pins; overvoltage/short-circuit protection.
- Package: small CPA (8-pin) package suitable for compact designs.
- Operating temperature: wide range (typical -40°C to +85°C).
Note: exact electrical specs (data rate, isolation voltage, supply ranges) vary by device variant. For precise figures, please refer to the MAX1487CPA datasheet.

MAX1487CPA is available in an 8-pin plastic SOIC (SOP-8) package.

- Pin count: 8 pins (SOIC-8/DIP-8 package).
- Function: Half-duplex RS-485/RS-422 transceiver with DI (data in), RO (receiver out), A and B bus pins, DE/RE control, plus Vcc and Gnd; includes 3-state outputs and a fail-safe receiver.

The MAX1487CPA is manufactured by Maxim Integrated Products, now part of Analog Devices, Inc. Maxim is a fabless semiconductor company that designs analog and mixed-signal integrated circuits.

Applications of MAX1487CPA:
- Industrial automation and control (PLC interfaces, motor controllers)
- Building/process automation (sensors, controllers, remote I/O)
- Long-distance differential serial networks (RS-485/RS-422, multi-point or point-to-point)
- Data acquisition and telemetry systems
- Instrumentation requiring robust differential signaling

MAX1487CPA is a dual RS-485/RS-422 transceiver. Possible equivalents from other vendors:
- TI: SN65HVD178A / SN65HVD238
- Microchip: MCP2551
- Analog Devices: ADM2483 / ADM2485 (isolated variants)
- Maxim: MAX3485 / MAX3483 (RS-485 transceivers)
Note: cross-reference depends on features (supply voltage, data rate, fail-safe, isolation). Verify exact specs for a true substitute.