RS-232 transceiver with 5 drivers, 3 receivers — what it is and where it fits
The Maxim Integrated MAX3238EAI+ is a full-duplex RS-232 transceiver in a 28-SSOP package, carrying five drivers and three receivers — an asymmetric ratio that suits DTE-side equipment where the transmit path needs more channels than the receive side. Rated for 250kbps data rate, it operates from a 3V to 5.5V supply, covering both 3.3V and 5V logic rails without a separate level translator. The industrial temperature range of -40°C to 85°C makes it a fit for factory automation panels, outdoor telecom gear, and embedded control boards where the ambient temperature swings beyond commercial limits.
Supply range and data rate — what they mean for the BOM
The 3V minimum supply means this part works on a 3.3V rail without a boost converter, saving a regulator slot on mixed-voltage boards. At 250kbps it handles standard UART rates with margin, but falls short of the 1Mbps class.
Active lifecycle — no obsolescence risk for new designs
No last-time-buy or end-of-life notice applies; the part is suitable for new-product introduction and ongoing production builds.
Package and mounting — board-fit note
Housed in a 28-SSOP (0.209", 5.30mm width) surface-mount package. The supplier device package is also 28-SSOP, so no footprint mismatch between the order code and the actual component.