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Analog Devices LTC2877HDD#PBF — Sensors & Transducers

LTC2877HDD#PBF RS-485 Transceiver 20 Mbps Half-Duplex 10-DFN

MPNLTC2877HDD#PBF
End of Life

Analog Devices LTC2877HDD#PBF, RS-485 transceiver, half-duplex, 1 driver / 1 receiver, 20 Mbps data rate, 4.5V to 5.5V supply, 240 mV receiver hysteresis, -40°C to 125°C, 10-WFDFN exposed pad (3x3 mm), tube package.

$10.9Ref. price · indicative, final on quote
Packaging10-WFDFN Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LTC2877HDD#PBF specifications
ParameterValue
TypeTransceiver
MountingSurface Mount
Voltage4.5V ~ 5.5V
ProtocolRS485
Operating temperature-40°C ~ 125°C
DuplexHalf
PackageTube
Data rate20Mbps
Case10-WFDFN Exposed Pad
Receiver hysteresis240 mV
Number of drivers (Receivers)1/1

Product details

RS-485 transceiver for high-speed industrial buses

The LTC2877HDD#PBF is a half-duplex RS-485 transceiver from Analog Devices, delivering a 20 Mbps data rate over a single differential pair. The 240 mV receiver hysteresis provides noise margin on long cable runs or in electrically noisy factory-floor environments, reducing the risk of bit errors from reflections or coupled interference. Operating from a 4.5V to 5.5V supply, it is suited to 5 V industrial logic rails and can be paired with isolated DC-DC converters for galvanically isolated RS-485 ports.

Temperature range and package constraints

The 125°C upper limit exceeds the 85°C ceiling of the ADM3485ARZ, making it the choice for engine-bay or downhole instrumentation where ambient temperatures exceed 85°C.

ROHS3 compliant. Confirm the BOM's packaging code before ordering.

Frequently asked questions

What is the data rate of LTC2877HDD#PBF?

The LTC2877HDD#PBF supports a data rate of 20 Mbps over RS-485. This is faster than the ADM3078EYRZ (16 Mbps) and ADM3485ARZ (10 Mbps), making it suitable for high-speed industrial networks.

Is LTC2877HDD#PBF a half- or full-duplex transceiver?

It is a half-duplex transceiver — the driver and receiver share the same differential pair, so the bus must be direction-controlled. For full-duplex applications requiring separate transmit and receive pairs, consider a full-duplex RS-485 part.

What is the difference between LTC2877HDD#PBF and LTC2877HDD#TRPBF?

The two order codes share identical electrical specifications and package. The difference is packaging: LTC2877HDD#PBF ships in a tube, while LTC2877HDD#TRPBF ships on tape and reel. Choose based on your assembly line's feeder requirements.

Does LTC2877HDD#PBF have an equivalent or substitute?

Within the Analog Devices portfolio, the ADM3078EYRZ is a close functional peer — also half-duplex RS-485/RS-422, 1/1 driver/receiver, -40°C to 125°C, but with a 16 Mbps data rate and 100 mV hysteresis versus 20 Mbps and 240 mV. The ADM3065EBRZ offers 50 Mbps but with only 30 mV hysteresis and a 3.0 V supply. Neither is a drop-in replacement; verify the supply voltage, data rate, and noise margin requirements before substituting.