LTC2857CMS8-1#PBF

Drivers, Receivers, Transceivers Overview

The LTC2857CMS8-1#PBF is a low-power, full-duplex RS485/RS422 transceiver operating on a 5V supply. It supports maximum data rates of 20Mbps or 250kbps for low EMI applications. The receiver features a one-eighth unit load, supporting up to 256 nodes per bus (C and I-Grade). It includes enhanced ESD protection rated at ±15kV HBM without latchup. The device operates within a commercial temperature range of 0°C to 70°C and is housed in an 8-lead MSOP package.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex communication with independent driver and receiver channels
• Enhanced ESD protection withstands ±15kV human body model
• High input impedance allows connection of up to 256 nodes
• Guaranteed failsafe receiver operation under floating or shorted inputs

Drivers, Receivers, Transceivers Applications

• Low power RS485/RS422 transceivers
• Level translators
• Backplane transceivers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix CMS8-1#PBF against official Analog Devices documentation to confirm the commercial temperature grade and MSOP-8 packaging. Ensure compatibility with system voltage requirements of 4.5V to 5.5V. Confirm that the full-duplex configuration meets the design needs, as this part lacks separate enable pins compared to other variants in the family.

Drivers, Receivers, Transceivers Selection Notes

Select the LTC2857CMS8-1#PBF when full-duplex operation is required alongside high node count capabilities. The C-grade designation indicates suitability for commercial environments between 0°C and 70°C. For industrial or automotive applications requiring wider temperature ranges, consider the I-grade or H-grade equivalents within the same series.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2857 series of rugged RS485/RS422 transceivers. It shares core electrical characteristics with half-duplex variants like the LTC2856 but provides simultaneous transmit and receive paths. The MSOP-8 package offers a compact footprint suitable for space-constrained designs while maintaining robust signal integrity over twisted-pair cables.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2857IMS8-1#PBF (Industrial Grade)

Drivers, Receivers, Transceivers FAQ

What is the failsafe behavior of the receiver?

The receiver guarantees a logic-high output state when inputs are floating, shorted, or terminated but not driven for more than approximately 3µs.

How does the device handle bus contention?

Excessive power dissipation from bus contention is prevented by current limiting all outputs and thermal shutdown protection.

What is the maximum ESD rating?

The parts can withstand ±15kV (human body model) on the transceiver interface pins without latchup or damage.