MAX3045BEUE+

Overview

The MAX3045BEUE+ is a quad RS-485/RS-422 transmitter designed for digital data transmission over twisted-pair balanced lines. It operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 20Mbps. The device features ±10kV Human Body Model ESD protection on all outputs and withstands ±4kV Electrical Fast Transient/Burst stress per IEC 1000-4-4. It includes hot-swap capability to prevent false transitions during power-up or insertion. The component is available in a 16-pin TSSOP package with an operating temperature range of -40°C to +85°C.

Feature Summary

• Hot-swap capability prevents erroneous data transfer during board insertion or power-up sequences.
• Integrated high-level ESD protection ensures robustness against electrostatic discharges and fast transients.
• Low-power shutdown mode significantly reduces current consumption when the device is disabled.
• Pin-compatible design allows direct upgrades to industry-standard 'SN75174 and 'DS26LS31C interfaces.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Transmitter applications requiring ESD sensitivity
• Hand-held industrial equipment
• Industrial PLC networks

Procurement Notes

Verify the specific suffix BEUE+ corresponds to the -40°C to +85°C extended temperature range and TSSOP-16 package configuration. Confirm RoHS compliance status as indicated by the '+' suffix. Ensure the ordering part number matches the exact datasheet revision requirements for your manufacturing process.

Selection Notes

Select this component when high-speed data rates up to 20Mbps are required alongside significant ESD immunity. It serves as a low-power alternative to legacy drivers, offering superior transient protection compared to standard interface ICs. Verify that the system utilizes a single +5V supply and requires four independent transmitter channels.

Part Context

This device belongs to the MAX3040–MAX3045 family of quad 5V RS-485/RS-422 transmitters. While other members like the MAX3040 offer lower speeds (250kbps), the MAX3045B variant specifically targets high-speed applications. The family shares common pinouts and hot-swap architectures, facilitating modular design across different speed requirements.

Replacement Considerations

Publicly confirmed pin-compatible replacements include the 'SN75174 and 'DS26LS31C. Designers should verify that these legacy equivalents meet the specific ESD protection levels and hot-swap timing requirements defined in the MAX3045 datasheet before substitution.

FAQ

How does the hot-swap feature function during power-up?

The hot-swap inputs hold the enable pins in a disabled state while VCC ramps up, preventing the driver outputs from causing glitches on the bus until the internal circuitry is fully powered.

What is the difference between the MAX3045B and MAX3045E variants?

The primary difference is the operating temperature range; the 'C' suffix indicates 0°C to +70°C, while the 'E' suffix (as in MAX3045BEUE+) indicates an extended range of -40°C to +85°C.

Can this device be used as a receiver?

No, the MAX3045 is strictly a transmitter. It must be paired with a compatible receiver, such as the MAX3093E or MAX3095, to form a complete communication link.