LTC2856HDD-1#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2856HDD-1#TRPBF is a low-power, half-duplex RS485/RS422 transceiver operating on a 5V supply. It supports a maximum data rate of 20Mbps and features enhanced ESD protection capable of withstanding ±15kV (human body model) without latchup or damage. The device includes current-limited drivers and thermal shutdown to prevent excessive power dissipation during bus contention or faults. It operates within a temperature range of -40°C to 125°C (H-Grade). The receiver input resistance exceeds 96kΩ, supporting up to 256 nodes per bus. Supply current in receive mode is typically 900µA maximum.

Drivers, Receivers, Transceivers Feature Summary

• Enhanced ESD protection withstands ±15kV HBM on interface pins without latchup or damage.
• High input impedance receiver supports up to 256 nodes per bus over the entire common mode range.
• Guaranteed failsafe receiver operation ensures a high output state when inputs are floating or shorted.
• Current-limited drivers and thermal shutdown protect against excessive power dissipation from bus contention.

Drivers, Receivers, Transceivers Applications

• Low power RS485/RS422 transceivers
• Level translator applications
• Backplane transceivers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging and lead-free construction. Confirm the H-grade designation matches the required -40°C to 125°C operating temperature range for your application environment. Ensure the DD package type corresponds to the 8-lead plastic DFN footprint required by your PCB layout.

Drivers, Receivers, Transceivers Selection Notes

Select this component for half-duplex communication requiring 20Mbps data rates with robust fault protection. The H-grade variant is necessary for automotive or industrial environments exceeding 85°C. Consider the one-eighth unit load capability if maximizing node count on the bus is critical. Verify that the 5V supply voltage aligns with your system's power architecture.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2856/LTC2857/LTC2858 family of rugged RS485/RS422 transceivers. The LTC2856 series specifically denotes half-duplex devices with enable controls, distinguishing it from the full-duplex LTC2857 and LTC2858 variants. The 'H' indicates the extended temperature grade, while 'DD' specifies the 8-lead DFN package.

Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed substitutes include other Analog Devices parts within the same family, such as the LTC2856CMS8-1#PBF (MSOP package) or LTC2857HDD-1#PBF (full-duplex variant). Verify pin compatibility and duplex mode requirements before substitution.