MAX13451EAUD+

Drivers, Receivers, Transceivers Overview

The MAX13451EAUD+ is a half-duplex RS-485 transceiver in a 14-pin TSSOP-EP package. It operates on a VCC supply of +4.5V to +5.5V and supports logic levels down to +1.8V via the VL input. The device features selectable internal termination resistors (100Ω or 120Ω) controlled by TERM and TERM100 pins. It achieves data rates up to 20Mbps, with slew-rate limiting enabled for rates up to 500kbps to reduce EMI. Key specifications include ±30kV HBM ESD protection, fail-safe receivers, thermal shutdown at +150°C, and operation from -40°C to +125°C.

Drivers, Receivers, Transceivers Feature Summary

• Integrated pin-selectable 100Ω and 120Ω termination resistors simplify network configuration without external components.
• FAULT alarm output indicates driver error conditions such as overcurrent or short circuits.
• INV input allows phase reversal of A-B signals to correct misconnected wiring.
• Slew-rate limiting reduces electromagnetic interference and reflections at lower data rates.

Drivers, Receivers, Transceivers Applications

• Industrial Control Systems
• Motor Control
• Security Networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'AUD+' against the manufacturer's current documentation to confirm lead-free status and RoHS compliance. Confirm that the exposed pad (EP) connection requirements are met within the target PCB layout design to ensure proper thermal dissipation and electrical grounding.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a half-duplex RS-485 interface is required alongside integrated bus termination options. It is suitable for systems needing fault detection and polarity inversion capabilities. Ensure the application environment remains within the specified automotive temperature range and voltage limits.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX13450E/MAX13451E family of RS-485 transceivers. While the MAX13450E provides full-duplex communication, the MAX13451EAUD+ is specifically configured for half-duplex applications. Both share identical physical packages and core electrical characteristics.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX13450EAUD+ serves as a functional alternative if full-duplex communication is required instead of half-duplex. Other members of the MAX1345x series may offer different pin counts or packaging options but require verification of electrical compatibility.

Drivers, Receivers, Transceivers FAQ

How is the internal termination resistor value selected?

The termination resistor value is selected using the TERM100 pin. Driving TERM100 high selects the 100Ω resistor, while driving it low selects the 120Ω resistor. The TERM pin must be driven low to enable either resistor.

What triggers the FAULT output on the MAX13451E?

The FAULT output asserts high during overcurrent conditions, if the A/B lines are forced below ground or above VCC while the driver is enabled, or if the junction temperature exceeds +150°C.

Does the INV input affect the receiver behavior?

Yes. When the INV input is high, the RO receiver output logic level is inverted relative to the A and B signals compared to normal fail-safe operations.