LTC2857CDD-2#PBF

Drivers, Receivers, Transceivers Overview

The LTC2857CDD-2#PBF is a low-power, full-duplex RS485/RS422 transceiver operating on a 5V supply. It supports a maximum data rate of 20Mbps or a slew-rate-limited 250kbps for low EMI applications. The receiver features a one-eighth unit load, supporting up to 256 nodes per bus in C and I grades. Enhanced ESD protection withstands ±15kV (HBM) without latchup. The device includes current-limited drivers and thermal shutdown for fault protection. It operates within a commercial temperature range of 0°C to 70°C and is housed in an 8-lead 3mm × 3mm DFN package.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex communication with independent transmit and receive channels
• Slew-rate limiting capability to reduce high-frequency EMI emissions
• High input impedance allowing connection of up to 256 nodes on the bus
• Integrated failsafe mechanism ensuring a logic-high output during idle states

Drivers, Receivers, Transceivers Applications

• Low power RS485/RS422 transceivers
• Level translator circuits
• Backplane transceiver systems

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging when sourcing components. Confirm that the DD package designation corresponds to the 8-lead plastic DFN form factor required for the design. Ensure the C grade selection matches the intended commercial temperature operating range of 0°C to 70°C for the application environment.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring full-duplex operation with reduced electromagnetic interference through slew-rate limiting. The one-eighth unit load specification allows for extensive node counts compared to standard receivers. Verify that the 5V supply voltage aligns with the system power rails and that the 3mm × 3mm DFN footprint fits the available PCB space constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC285x family of low-power RS485/RS422 transceivers manufactured by Analog Devices Inc. The family includes half-duplex variants like the LTC2856 and other full-duplex options such as the LTC2858. The specific model denotes a full-duplex device with a 250kbps slew-rate-limited data rate option and commercial temperature grading.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2857CDD-2#TRPBF