Maxim Integrated MAX491ECPD+ Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
The MAX491ECPD+ is a high-performance transceiver from Maxim Integrated, designed to provide reliable communication in RS-485 and RS-422 networks. This integrated circuit is ideal for applications requiring low power consumption and reduced electromagnetic interference (EMI) through its slew-rate-limited design.
Featuring a quarter-unit-load receiver input impedance, the MAX491ECPD+ allows up to 128 transceivers on the bus, making it suitable for large network applications such as industrial control systems, HVAC systems, and building automation. With its extended -40°C to +85°C temperature range, the device is well-suited for harsh industrial environments.
Key specifications of the MAX491ECPD+ include a data rate of 2.5Mbps, which strikes a balance between speed and power consumption, and a wide common-mode range of -7V to +12V, allowing for robust data communication over long cable runs. The transceiver operates from a single 5V supply, simplifying power management in system designs.
The MAX491ECPD+ features true fail-safe receiver inputs, which ensure a logic-high receiver output when the inputs are open, shorted, or connected to a terminated transmission line with all drivers disabled. This characteristic enhances the reliability of the system by providing a known output state under fault conditions.
The device comes in a 14-pin DIP package, which is easy to integrate into existing designs. It also includes driver short-circuit current limiting and thermal shutdown for additional protection, ensuring the transceiver's reliability and longevity.
With its combination of low-power operation, large network support, and robust protection features, the Maxim Integrated MAX491ECPD+ transceiver is an excellent choice for designers looking to implement RS-485 or RS-422 communication in their applications. Its reliable performance and ease of use make it a go-to solution for a wide range of data transmission challenges.
For more information and full specifications, please refer to the Maxim Integrated datasheet for the MAX491ECPD+.
