RS562 transceiver for 3.3V serial links
The Maxim MAX563CWN+ is a full-duplex RS562 transceiver integrating two drivers and two receivers in a single 18-SOIC package. RS562 is a single-supply variant of RS232 that operates from a 3V to 3.6V rail, making it a direct fit for 3.3V logic systems without needing a separate charge-pump or ±12V supply. The 116 kbps data rate covers standard asynchronous serial communication for terminals, industrial controllers, and point-of-sale equipment where the cable run stays within the RS562 distance envelope.
Supply voltage and signal levels
Rated for a 3V to 3.6V supply, the MAX563CWN+ answers the common question: yes, it operates at 3.3V. The 500 mV receiver hysteresis provides noise immunity on the input lines, which matters when the cable picks up coupled interference in an electrically noisy environment. Because RS562 uses a single-ended output swing referenced to ground (unlike RS232's bipolar swing), the driver output levels are compatible with 3.3V logic inputs on the receiving side.
Package and footprint
Housed in an 18-SOIC wide-body package (0.295" body width, 7.50 mm), the MAX563CWN+ uses the larger SOIC footprint that is not pin-compatible with the narrow 18-SOIC (0.150" body). Verify your PCB land pattern before ordering — the wide-body variant is less common in automated pick-and-place libraries and may require a separate footprint definition. Surface-mount assembly with standard reflow profiles applies;.
Temperature grade and deployment environment
The 0°C to 70°C commercial temperature range limits this part to indoor, temperature-controlled equipment — office peripherals, test instruments, telecom racks, and similar environments. It is not rated for industrial or automotive extended-temperature operation. For designs that must survive -40°C to +85°C, look at Maxim's industrial-temperature RS562 transceivers in the same family.
Lifecycle and compliance
The MAX563CWN+ carries an Active product status and is ROHS3 compliant. The "+" suffix in the ordering code denotes the lead-free / RoHS-compliant finish — the earlier MAX563CWN (without the plus) was the tin-lead version. If your BOM specifies the non-RoHS variant, the MAX563CWN+ is the drop-in replacement with the same electrical specifications and package, just with the RoHS-compliant termination finish.