LTC2858CMS-2#PBF

Drivers, Receivers, Transceivers Overview

The LTC2858CMS-2#PBF is a low-power, full-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc. It operates on a single 5V supply and supports a maximum data rate of 250kbps with slew-rate limiting to minimize electromagnetic interference (EMI). The device features a one-eighth unit load receiver input resistance exceeding 96kΩ, enabling support for up to 256 nodes per bus. It includes enhanced ESD protection rated at ±15kV HBM, current-limited drivers, thermal shutdown, and a delayed micropower shutdown mode drawing a maximum of 5µA.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limited driver outputs reduce high-frequency EMI emissions for compliance in sensitive environments.
• High input impedance receiver allows connection of up to 256 nodes on the bus without excessive loading.
• Integrated failsafe mechanism guarantees a logic-high output state when inputs are floating or shorted.
• Robust protection against overcurrent, thermal overload, and electrostatic discharge events.

Drivers, Receivers, Transceivers Applications

• Low EMI industrial communication networks
• Multi-drop RS-485 sensor buses
• Backplane interconnects requiring reduced signal noise

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix CMS-2#PBF against the manufacturer's official documentation to confirm package type, temperature grade, and lead-free status. Ensure compatibility with system voltage requirements and interface standards before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex communication with strict EMI constraints. The 250kbps data rate is suitable for lower-speed control systems. Verify that the MSOP-10 package fits the available PCB footprint and that the commercial temperature range meets operational needs.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2858 family of low-power RS-485/RS-422 transceivers. It differs from the LTC2858-1 variant by offering a lower 250kbps data rate instead of 20Mbps, specifically optimized for slew-rate limited operation to suppress electromagnetic interference.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2858IMS-2#PBF: Industrial temperature grade version of the same functional device.

Drivers, Receivers, Transceivers FAQ

What is the purpose of the slew-rate limiting feature?

It reduces high-frequency harmonics in the transmitted signal, thereby lowering electromagnetic interference (EMI) emissions from the equipment and data cables.

How does the failsafe feature operate?

It guarantees a logic-high output state if the differential inputs are shorted, left open, or terminated but not driven, preventing undefined states during idle conditions.

What is the maximum number of nodes supported?

The receiver has a one-eighth unit load input resistance, allowing up to 256 nodes to be connected to a single bus line.