LTC1482CN8#PBF

Drivers, Receivers, Transceivers Overview

The LTC1482CN8#PBF is a low power RS-485 transceiver in an 8-lead PDIP package. It operates on a single 5V supply with a maximum data rate of 4Mbps. The device features an active low carrier detect output and receiver fail-safe for floating or shorted inputs. Supply current is 900µA max with the driver enabled, dropping to 20µA in shutdown mode. It withstands –15kV ESD (HBM) and supports up to 32 transceivers on the bus.

Drivers, Receivers, Transceivers Feature Summary

• Active low open-drain carrier detect output
• Receiver fail-safe for floating or shorted inputs
• Enhanced ESD protection without latchup
• Thermal shutdown circuitry

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific CN8 suffix corresponds to the 8-lead PDIP package before ordering. Confirm that the commercial temperature range meets your operational requirements. Ensure the single-ended 5V supply voltage aligns with your system design constraints.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a dedicated carrier detect signal is required for cable insertion detection or bus monitoring. The integrated fail-safe eliminates the need for external pull-up resistors to maintain a known state during idle periods. Consider the thermal shutdown feature for environments prone to bus contention.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC1482 family of low power RS-485 transceivers. It shares functional similarities with the LTC1485 but includes the additional carrier detect capability. The CN8 designation specifically identifies the through-hole plastic dual in-line package variant within the product line.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

Drivers, Receivers, Transceivers FAQ

How does the carrier detect pin function?

The CD pin is an open-drain output that pulls low when a valid carrier signal is present on the A and B lines. It pulls high via an internal weak pull-up when no carrier is detected.

What happens to the outputs during shutdown?

In shutdown mode, both the driver and receiver outputs are three-stated. The carrier detect output is pulled high by the internal weak pull-up resistor.

Does the device require external termination for fail-safe?

No. The receiver fail-safe guarantees a high output state if the inputs are floating, shorted, or terminated without a signal, removing the need for external components.