RS-232 transceiver for multi-port serial links
The MAX211CAI+T is an RS-232 transceiver from Analog Devices (formerly Maxim Integrated) that handles full-duplex serial communication at 120 kbps. It packs four drivers and five receivers into a 28-pin SSOP package, making it a fit for multi-port RS-232 interfaces on a single IC. Supply range is 4.5V to 5.5V — a single 5V rail covers it. The 500 mV receiver hysteresis cleans up noisy lines from long cable runs or mixed-signal boards. Temperature grade is commercial: 0°C to 70°C. That keeps it in indoor equipment, office peripherals, test gear, and telecom line cards — not motor drives or outdoor enclosures.
Sourcing and lifecycle — active, no LTB risk
Lifecycle status is Active per the manufacturer, with RoHS3 compliance confirmed. No last-time-buy or end-of-life notice exists for this order code.
Package and footprint — 28-SSOP
Housed in a 28-SSOP package (0.209-inch body width, 5.30 mm). Surface-mount only. The supplier device package is also 28-SSOP, so the land pattern is standard for this footprint family.
Marking and authenticity cues
Cut Tape is also available. For a procurement desk verifying incoming stock, the laser-etched date code and font consistency on the 28-SSOP body are the first check against re-marked parts. Lot traceability back to an authorized chain is the second.