MAX3055ASD-T

Overview

The MAX3055ASD-T is a ±80V fault-protected CAN transceiver designed for 125kbps data rates. It operates with a supply voltage of 4.75V to 5.25V and supports an extended battery voltage range from +5V to +42V. The device features built-in slope control for unshielded cable applications and guarantees full wake-up capability during failure modes. It includes current-limiting and thermal-protection circuits to prevent transmitter destruction. The component is housed in a 14-pin SO package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Provides ±80V fault protection on CANH and CANL bus lines against electrical transients and overcurrent faults.
• Supports single-wire transmission mode with ground offset voltages up to 1.5V during specific failure conditions.
• Includes three low-power modes accessible via STB and EN pins, featuring wake-up through bus lines or local WAKE input.
• Built-in slope control allows the use of unshielded cables while receiver input filters ensure high noise immunity.

Applications

• Industrial HVAC systems
• Automotive networks requiring robust fault tolerance
• Rugged environments subject to electrical transients

Procurement Notes

Verify the ordering suffix '+T' indicates tape-and-reel packaging when sourcing components. Confirm that the part number corresponds to the Analog Devices/Maxim Integrated manufacturer designation. Ensure the specific variant matches the required 125kbps data rate specification for your application design.

Selection Notes

Select this model specifically for 125kbps applications; the MAX3054 handles 250kbps and the MAX3056 handles 40kbps. Consider the MAX3055 if slope control for unshielded cables is required. Verify compatibility with TJA1054 pinouts if replacing existing designs.

Part Context

The MAX3055 belongs to the MAX3054/MAX3055/MAX3056 family of ±80V fault-protected CAN transceivers. These devices interface protocol controllers with physical CAN bus wires. The family shares common features like fault management and low-power modes but differs in optimized data rates and slew control capabilities.

Replacement Considerations

The datasheet states the device is pin and functionally compatible with the TJA1054. Verify electrical parameters match before substitution.

FAQ

How does the MAX3055 handle bus failures?

The device detects various wiring failures (such as shorts or interrupts) and switches to single-wire mode to maintain communication. It guarantees full wake-up capability even during these failure modes.

What is the purpose of the INH pin?

The INH pin is an output used to deactivate an external voltage regulator. It goes high during wake-up or power-on to allow the regulator to shut down during sleep mode, reducing power consumption.

Does the MAX3055 support unshielded cables?

Yes, the MAX3055 includes a built-in slope-control feature that allows for the use of unshielded cables while maintaining high noise immunity through receiver input filters.