MAX3490AEGSA+T

MAX3490AEGSA+T is Maxim Integrated’s RS-485/RS-422 transceiver. It provides a differential driver and receiver in one device for high-speed, multi-point serial links over twisted-pair cabling. The part typically supports single-supply operation, standard RS-485/RS-422 signaling, and a controllable DE/RE interface for direction control. It includes a failsafe receiver that guarantees a known output when the bus is idle, open, or shorted, and offers protection features such as ESD protection on the bus lines and fault protection for robust operation. Applications include industrial automation, building automation, data acquisition, and other point-to-point or multi-point networks. The suffix AEGSA+T indicates RoHS-compliant, surface-mount packaging with tape-and-reel (T) handling. For exact electrical specifications, voltage ranges, data rates, pinout, and ordering details, consult the current MAX3490 datasheet.

Equivalent products to MAX3490AEGSA+T are RS-485/RS-422 transceivers from other vendors, such as:
- TI SN65HVD178x family
- ST SP348x family (SP3481/SP3482/SP3485)
- Analog Devices ADM3483/ADM3485
Ensure matching supply (3.3V/5V) and features (two-wire, failsafe, 1/2 unit load).

Here are the typical features of the MAX3490AEGSA+T RS-485/RS-422 transceiver:
- Half-duplex RS-485/RS-422 transceiver (2-wire bus)
- Single-supply operation (commonly 5V)
- Fail-safe receiver output (logic high for open/shorted/idle bus)
- Driver and receiver enable controls (DE/RE) with high-impedance when disabled
- High-speed data transfer (capable of Mbps-range rates)
- Robust protection: ESD protection on A/B lines
- Short-circuit and thermal protection for robustness
- Low quiescent current in standby
- Package: 8-pin EGSA with Tape-and-Reel (+T) packaging
Note: Refer to the official datasheet for exact electrical specs (voltage range, data rate, and protection levels) for your specific lot and packaging.

Pin count: 8 pins.
Function: Single-channel RS-485/RS-422 transceiver (half-duplex) with tri-state outputs. Provides DI (data input) to the driver, RO (receiver output) from the bus, A/B differential bus pins, and control pins DE (driver enable) and /RE (receiver enable), plus Vcc and GND.

- Manufacturer: Maxim Integrated Products, Inc. (now part of Analog Devices, Inc.).
- What kind of company: a fabless semiconductor company that designs and markets analog and mixed-signal ICs, outsourcing fabrication to foundries.

Applications of MAX3490AEGSA+T:
- Industrial automation and process control (RS-485/RS-422 networks)
- Building automation (HVAC, lighting, security)
- Remote telemetry and data acquisition
- Multi-point, long-distance serial networks in noisy environments
- Instrumentation and test equipment interfaces requiring robust serial communication

Package type: QFN, 28-pin with exposed pad, 4x4 mm package size; tape-and-reel option (+T).