Maxim Integrated Products introduces the MAX13450E/MAX13451E, RS-485 transceivers that integrate software-/pin-selectable, dual-termination (10ohm/120ohm) resistors to simplify RS-485 network configuration. These transceivers are well suited for industrial control equipment, IP camera installations, and other RS-485 network applications.

High-speed RS-485 networks require termination resistors at the end of each transmission line. This means that users must manually terminate the end-slave device through an external resistor or DIP switch each time they configure the network. By integrating switchable termination resistors, the MAX13450E/MAX13451E allow users to easily configure the network solely through software. This avoids the process of manual termination, thus enhancing RS-485 network scalability. Additionally, the integrated dual-termination resistors support both 24AWG and Cat 5/Cat 6 cables without the signal integrity problems associated with competitive solutions.

Both devices integrate a low-voltage logic interface (down to 1.62V) to support small-geometry ASICs/FPGAs without the need for additional parts. The MAX13451E has a fault alarm indicator to protect the system against driver errors, and the MAX13450E features a logic-inversion function to reverse the A-B signals in case they are connected incorrectly. Pin-selectable slew-rate limiting improves EMI performance, while robust ESD protection (±30kV, HBM*) and an automotive temperature range protect against harsh industrial environments.

The MAX13450E/MAX13451E are available in a 14-pin TSSOP package and are fully specified over the -40 degrees Celsius to +125 degrees Celsius automotive temperature range.

*Human Body Model