LTC1484CN8#PBF

Drivers, Receivers, Transceivers Overview

The LTC1484CN8#PBF is a low power RS-485 transceiver manufactured by Analog Devices Inc. It operates on a single 5V supply with a voltage range of 4.75V to 5.25V. The device features one driver and one receiver, supporting half-duplex communication at data rates up to 5 Mbps. Supply current is 900µA max when the driver is enabled and 700µA max when disabled. Shutdown mode draws 20µA max. It includes receiver fail-safe for floating or shorted inputs, ESD protection of ±15kV (HBM), and thermal shutdown. Operating temperature range is 0°C to +70°C in an 8-lead PDIP package.

Drivers, Receivers, Transceivers Feature Summary

• Fail-safe receiver guarantees a high output state when inputs are open, shorted, or terminated without a signal.
• Enhanced ESD protection withstands -15kV human body model and IEC-1000-4-2 levels without latchup.
• Thermal shutdown circuit forces outputs to high impedance during excessive power dissipation from bus contention.
• Power-up/down glitch-free driver outputs prevent transient signaling errors.

Drivers, Receivers, Transceivers Applications

• Battery-powered RS-485/RS-422 applications
• Low power RS-485/RS-422 transceiver networks
• Level translator circuits

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix CN8 corresponds to the commercial grade PDIP-8 package before ordering. Confirm that the component meets the required 0°C to +70°C operating temperature range for your environment. Check for RoHS compliance status as indicated in official documentation. Ensure availability aligns with project timelines given potential supply chain variations.

Drivers, Receivers, Transceivers Selection Notes

Select this part for designs requiring low quiescent current and robust fault protection on RS-485 buses. The integrated fail-safe eliminates the need for external pull-up resistors in many configurations. Consider the 5 Mbps maximum data rate and 32-node bus capacity when designing network topology. Verify pin compatibility with existing LTC485 footprints if upgrading legacy designs.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC1484 series of low power RS-485 transceivers. It is pin-compatible with the LTC485, facilitating direct upgrades. The CN8 suffix denotes the commercial temperature variant housed in an 8-lead plastic dual in-line package. It shares functional similarities with other devices in the Analog Devices interface IC portfolio designed for industrial communication.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC485 is a confirmed pin-compatible substitute within the same product family. Verify that the replacement matches the specific temperature grade and package requirements of the original design.

Drivers, Receivers, Transceivers FAQ

How does the receiver fail-safe feature function?

It guarantees a high receiver output state when the A and B inputs are left open, shorted together, or terminated with no signal present, requiring no external components.

What is the ESD protection rating for the A and B pins?

The A and B pins withstand -15kV using the Human Body Model, as well as IEC-1000-4-2 Level 4 (-8kV) contact and Level 3 (-8kV) air discharge specifications.

What triggers the thermal shutdown mechanism?

Excessive power dissipation caused by bus contention or faults raises the die temperature above 150°C, forcing the driver outputs into a high impedance state until the temperature cools to approximately 130°C.