RS-232 transceiver for industrial serial links
The Maxim Integrated MAX3227EAAE+ is a full-duplex RS-232 transceiver in a 16-SSOP package, integrating one driver and one receiver for point-to-point or multi-point serial communication. It handles data rates up to 1 Mbps, making it suitable for applications that need faster throughput than standard 115.2 kbps RS-232 links. The wide supply range from 3 V to 5.5 V lets it operate from a single 3.3 V or 5 V rail without an extra regulator, simplifying power distribution in mixed-voltage designs. With an operating temperature range of -40°C to 125°C, this part is rated for industrial environments such as factory automation, motor drives, and outdoor telecom equipment where the ambient temperature can swing well beyond commercial limits.
1 Mbps data rate and 500 mV hysteresis — what they mean for the link
The 1 Mbps data rate is the headline spec: it supports high-speed RS-232 links for applications like industrial barcode scanners, PLC programming ports, or debug consoles that need to push firmware updates quickly. At this rate, the receiver hysteresis of 500 mV provides noise immunity on the incoming signal, reducing the chance of bit errors on a long cable run in an electrically noisy factory floor. The full-duplex capability means the driver and receiver can operate simultaneously, which is useful for protocols that require continuous transmit and receive without bus turnaround delays.
Supply voltage and temperature grade — fit for the BOM
The 3 V to 5.5 V supply range covers common logic rails: 3.3 V for low-power MCUs and FPGAs, and 5 V for legacy industrial controllers or +5 V-only backplanes. This eliminates the need for a separate level shifter or dedicated RS-232 supply rail, saving board area and BOM cost. The -40°C to 125°C temperature range is the industrial-plus grade, suitable for under-hood automotive modules, outdoor base stations, or engine-bay sensors where the ambient temperature can exceed 85°C. The 16-SSOP package (5.30 mm body width) is a compact footprint for space-constrained PCBs, and the surface-mount format is compatible with standard reflow soldering processes.
Sourcing and lifecycle — active production, no LTB risk
It is ROHS3 compliant, meeting the current EU restriction requirements for lead-free soldering. This part is sourced through independent distribution and is available to order against an RFQ; current pricing and stock levels are confirmed at quote time.