MAX483ECSA

Overview

The MAX483ECSA is a low-power, half-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 250kbps with slew-rate-limited drivers to minimize EMI. The device features ±15kV ESD protection on all pins without latchup. It includes one driver and one receiver in an 8-pin SO package. Key electrical parameters include a no-load supply current of 250µA maximum, a shutdown current of 0.5µA typical, and a fail-safe receiver input that guarantees a logic-high output when the input is open.

Feature Summary

• Slew-rate-limited drivers reduce electromagnetic interference and reflections for error-free transmission.
• Integrated ±15kV ESD protection on driver outputs and receiver inputs ensures robustness in harsh environments.
• Low-power shutdown mode significantly reduces supply current consumption when the device is disabled.
• Fail-safe receiver design guarantees a high logic state if the differential input lines are left open.

Applications

• Industrial-control local area networks
• EMI-sensitive communication applications
• Low-power RS-485 and RS-422 bus systems

Procurement Notes

Verify the complete part number including temperature range and packaging suffix against official Analog Devices documentation. Confirm RoHS compliance status and lead-free specifications prior to integration. Ensure the specific ordering code matches the required operational temperature range and physical package dimensions for your PCB layout.

Selection Notes

Select this component for half-duplex applications requiring reduced EMI due to its slew-rate-limited driver characteristics. It is suitable for systems operating at data rates up to 250kbps where power efficiency is critical. Compare with non-E versions if ESD protection requirements are lower, or consider full-duplex variants like the MAX488E if simultaneous transmit/receive capability is needed.

Part Context

The MAX483ECSA belongs to the MAX48xE family of low-power transceivers designed for RS-485 and RS-422 communications. This family shares common interface standards but varies in duplex capability, data rate limits, and ESD protection levels. The 'C' suffix denotes the commercial temperature range (0°C to +70°C), while the 'E' suffix indicates enhanced ESD protection features compared to standard industrial parts.

Replacement Considerations

The MAX483EESA+T is a pin-compatible alternative with an extended temperature range (-40°C to +85°C). Verify that the thermal performance and voltage specifications of any substitute match the original design constraints before implementation.