MAX3040CSE+

Overview

The MAX3040CSE+ is a quad RS-485/RS-422 transmitter manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply and supports data rates up to 250kbps. The device features ±10kV ESD protection (Human Body Model) and ±4kV Electrical Fast Transient immunity per IEC 1000-4-4. It includes hot-swap capability to prevent false transitions during power-up or insertion. Operating temperature range is 0°C to +70°C, with a typical supply current of 1mA and shutdown current of 2nA. It is housed in a 16-pin Narrow SO package.

Feature Summary

• Hot-swap capability prevents erroneous data transfer during board insertion or power-up sequences.
• Integrated ESD protection rated at ±10kV Human Body Model and ±4kV IEC fast transient burst immunity.
• Slew-rate limiting minimizes electromagnetic interference and reduces signal reflections on improperly terminated cables.
• Low-power shutdown mode consumes only 2nA when enabled inputs are deactivated.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Hand-held equipment
• Industrial PLCs
• Networking applications

Procurement Notes

Verify the specific ordering suffix 'CSE+' corresponds to the required commercial temperature range and narrow SOIC package configuration. Confirm that the datasheet revision matches the design requirements for pinout compatibility with legacy standards like SN75174. Ensure the component meets RoHS compliance specifications if mandated by the project regulations.

Selection Notes

Select this component for designs requiring quad differential transmission over twisted-pair lines without integrated receivers. It serves as a low-power upgrade to industry-standard drivers like SN75174. Consider the MAX3095 receiver pair for optimal performance. Verify that the 250kbps data rate suffices for the application, as higher-speed variants exist within the same family.

Part Context

This part belongs to the MAX3040–MAX3045 family of 5V quad transmitters designed for digital data transmission. It is pin-compatible with older industry standards such as the SN75174 and DS26LS31C. The family offers various speed options and packaging types, including TSSOP, narrow SO, and wide SO configurations, allowing flexibility in PCB layout and thermal management.

Replacement Considerations

Pin-compatible replacements include the SN75174 and LTC487. For higher data rates, consider the MAX3041 (2.5Mbps) or MAX3042B (20Mbps) within the same package and voltage domain.