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Analog Devices MAX3040EUE+ — Sensors & Transducers

MAX3040EUE+ RS-422/RS-485 Driver

MPNMAX3040EUE+
End of Life

Analog Devices MAX3040EUE+, RS-422/RS-485 quad driver, 250 kbps, 4.75V–5.25V supply, -40°C to 85°C, 16-TSSOP

$7.53Ref. price · indicative, final on quote
Packaging16-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX3040EUE+ specifications
ParameterValue
TypeDriver
MountingSurface Mount
Voltage4.75V ~ 5.25V
ProtocolRS422, RS485
Operating temperature-40°C ~ 85°C
PackageTube
Data rate250kbps
Case16-TSSOP (0.173\", 4.40mm Width)
Number of drivers (Receivers)4/0

Product details

Quad RS-422/RS-485 line driver in 16-TSSOP

The MAX3040EUE+ is a dedicated quad driver for RS-422 and RS-485 networks, handling four differential outputs from a single 5V rail. With a data rate of 250 kbps, it fits industrial fieldbus links and PLC backplanes where signal integrity over twisted-pair cabling matters more than raw speed.

The supply range is tight at 4.75V to 5.25V — this is a pure 5V part. Do not feed it 3.3V; the outputs won't swing enough to meet RS-485 thresholds. If your BOM runs mixed 3.3V/5V logic, a level translator sits between the controller and this driver. The 16-TSSOP's thermal impedance is moderate; at 85°C ambient the junction stays within limits as long as the output current per channel stays under the datasheet's short-circuit limit.

For a repair bench or a new design, you are not chasing sunset inventory. The MAX3040EUE+ is ROHS3 compliant, which clears it for lead-free assembly lines without exemption paperwork.

Frequently asked questions

Does the MAX3040EUE+ work with 3.3V logic?

No — the supply voltage range is 4.75V to 5.25V. The logic inputs expect 5V levels; 3.3V drive will not reliably switch the outputs. Use a level translator if your controller runs at 3.3V.