ADM1486AR-REEL

Overview

The ADM1486AR-REEL is a half-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc. It operates from a single 5 V power supply with a typical quiescent current of 0.8 mA when disabled. The device supports data rates up to 30 Mbps and features independent driver and receiver enable controls. It includes thermal shutdown protection that activates at 150°C and short-circuit protection limiting output current to ±200 mA. The component is housed in an 8-lead SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Complies with EIA RS-485 and RS-422 standards for balanced data transmission
• Includes thermal shutdown circuitry and short-circuit protection for fault safety
• Features high impedance outputs when disabled or powered down to minimize bus loading
• Receiver incorporates fail-safe logic to ensure a logic high state if inputs are floating

Applications

• Industrial field equipment communication
• PROFIBUS network applications
• Multipoint bus transmission lines

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging type and lead-free status. The REEL suffix indicates tape and reel packaging, while REEL7 denotes a specific quantity per reel. Ensure the procurement matches the required industrial temperature grade and package variant listed in the current datasheet.

Selection Notes

Select this component for applications requiring low power consumption and high-speed bidirectional data communication on multipoint buses. It serves as a superior upgrade for legacy SN65ALS1176 designs. Consider the 30 Mbps data rate capability and the robust protection features when designing systems exposed to potential bus contention or output shorting conditions.

Part Context

This part belongs to the ADM1486 series of low-power RS-485 transceivers. The AR designation specifies the industrial temperature range (-40°C to +85°C) and the standard narrow-body SOIC package. The REEL suffix identifies the specific shipping configuration provided by the manufacturer for automated assembly processes.

Replacement Considerations

The datasheet explicitly identifies the ADM1486 as a superior upgrade for the SN65ALS1176. Verify pin compatibility and electrical specifications before substituting other RS-485 transceivers in existing designs.

FAQ

What happens if the die temperature exceeds 150°C?

The thermal shutdown circuitry detects the excessive temperature and forces the driver outputs into a high impedance state to prevent damage.

How does the device handle unconnected receiver inputs?

The receiver contains a fail-safe feature that guarantees a logic high output state if the inputs are open circuit or floating.

What is the maximum output current during fault conditions?

Short-circuit protection circuits limit the maximum output current to ±200 mA during fault conditions such as output shorting.