MAX1483ESA+

Drivers, Receivers, Transceivers Overview

The MAX1483ESA+ is a half-duplex RS-485 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. The device features low-power operation with a typical supply current of 20µA and a shutdown mode consuming 0.1µA. It utilizes an 8-pin SOIC package and functions within a temperature range of -40°C to +85°C. Key electrical characteristics include a 96kΩ receiver input impedance, allowing for up to 256 units on the bus, and a common-mode input voltage range of -7V to +12V.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate-limited drivers minimize electromagnetic interference and reduce signal reflections caused by improperly terminated cables.
• High-impedance receiver inputs allow for large network configurations with up to 256 transceivers on a single bus.
• Integrated thermal shutdown and short-circuit current limiting protect driver outputs during fault conditions or excessive power dissipation.
• Fail-safe receiver design guarantees a logic-high output state when the differential input lines are left open.

Drivers, Receivers, Transceivers Applications

• Low-power RS-485 and RS-422 communication networks
• Industrial control local area networks requiring high node density
• Transceivers designed for EMI-sensitive environments

Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the ordering suffix matches the required package type and temperature grade. Ensure compliance with relevant environmental standards such as RoHS before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring half-duplex RS-485 communication with minimal power consumption. The 1/8-unit-load specification makes it suitable for extensive bus topologies exceeding standard 32-node limits. Verify that the system operates within the specified +5V supply voltage constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX1482/MAX1483 family of low-power transceivers. While the MAX1482 provides full-duplex operation, the MAX1483 is configured specifically for half-duplex communication. Both share identical pinouts and core electrical specifications regarding power consumption and protection features.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX1483CSA serves as a commercial-grade alternative operating within the 0°C to +70°C temperature range. Other variants in the series include the MAX1483CPA and MAX1483CUA, which offer different packaging options while maintaining the same functional interface.

Drivers, Receivers, Transceivers FAQ

How does the MAX1483 achieve reduced electromagnetic interference?

The device incorporates slew-rate-limited drivers that slow down signal transitions, thereby minimizing high-frequency harmonics and reducing electromagnetic emissions compared to standard RS-485 transceivers.

What mechanism ensures the receiver output remains stable if the bus is disconnected?

The receiver includes a fail-safe feature that guarantees a logic-high output state if the differential input terminals (A and B) are left open-circuited, preventing undefined states.

What is the maximum number of devices supported on a single bus?

Due to the 96kΩ receiver input impedance, which constitutes a 1/8-unit load, the MAX1483 allows for up to 256 transceivers to be connected on a single bus line.