LTC2859IDD#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2859IDD#TRPBF is a low-power, half-duplex RS485/RS422 transceiver operating on a 5V supply. It features a logic-selectable 120Ω termination resistor and supports up to 256 nodes per bus with one-eighth unit load input impedance. The device offers a maximum data rate of 20Mbps in normal mode and 250kbps in the logic-selectable low-EMI SLO mode. It includes current-limited drivers, thermal shutdown protection, and enhanced ESD protection rated at ±15kV HBM. The receiver guarantees a high output state under floating or shorted input conditions. It operates within a temperature range of -40°C to +85°C and is housed in a 10-pin DFN package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor controlled by the TE pin
• Logic-selectable low-EMI mode limiting data rates to 250kbps
• Guaranteed failsafe receiver operation for floating or shorted inputs
• High input impedance supporting up to 256 nodes on the bus

Drivers, Receivers, Transceivers Applications

• Level translator applications
• Backplane transceiver systems
• Multi-node RS485 networks requiring end termination control

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm that the #TRPBF designation corresponds to the tape and reel packaging format intended for automated assembly processes. Ensure compatibility with standard surface mount placement equipment specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring integrated line termination without external resistors. The half-duplex configuration suits bidirectional communication needs. Consider the low-EMI feature if signal integrity constraints exist. Verify that the 5V supply voltage aligns with system power rails and that the 10-pin DFN footprint fits the PCB layout constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2859/LTC2861 family of 20Mbps RS485/RS422 transceivers. The LTC2859 variant provides half-duplex communication, whereas the LTC2861 offers full-duplex capabilities. Both share identical electrical characteristics regarding speed, protection, and termination features, differing primarily in driver and receiver channel availability.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2859CDD#TRPBF: Same function with commercial temperature range (0°C to 70°C).

Drivers, Receivers, Transceivers FAQ

How does the SLO pin affect transmission?

Driving the SLO pin low forces the driver into a reduced slew rate mode, limiting the maximum data rate to approximately 250kbps to minimize electromagnetic interference emissions.

What is the purpose of the TE pin?

The TE pin enables or disables the internal 120Ω termination resistor connected between pins A and B, allowing dynamic adjustment of line termination via logic control.

Does the device support node expansion?

Yes, the high input impedance of one-eighth unit load allows the bus to support up to 256 receivers, facilitating extensive multi-node network configurations.