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The MAX3221EEAE+ is a single-driver, single-receiver RS-232 transceiver from Analog Devices/Maxim Integrated. It operates on a +3.0V to +5.5V supply and supports data rates up to 250kbps. The device features AutoShutdown technology, reducing supply current to 1µA when no valid signal is detected. It includes ±15kV ESD protection (HBM), ±8kV contact discharge, and ±15kV air-gap IEC 1000-4-2 protection. The component is housed in a 16-pin SSOP package and functions within an industrial temperature range of -40°C to +85°C.
Verify the specific suffix EEAE+ against official manufacturer documentation to confirm the 16-pin SSOP package and -40°C to +85°C operating temperature range. Confirm RoHS compliance status directly with the supplier or manufacturer datasheet before procurement.
Select this component for applications requiring minimal pin count and low standby power. Ensure the design accommodates four external 0.1µF capacitors for the charge pump circuitry. Verify that the system logic levels are compatible with the TTL/CMOS inputs and outputs provided by the transceiver.
This part belongs to the MAX3221E/MAX3223E/MAX3243E family of 3V-powered RS-232 interfaces. While other variants offer multiple drivers or receivers, the MAX3221E specifically provides a single driver and receiver configuration optimized for space-constrained designs.
Publicly confirmed substitutes include MAX3221ECAE+, MAX3221ECTE+, and MAX3221EEUE+. These parts share the same core functionality but differ in package type or commercial temperature rating.
The AutoShutdown feature monitors receiver inputs. If no valid RS-232 signal levels are detected for 30µs, the internal charge pump and drivers shut off, reducing supply current to 1µA until a valid signal reactivates the device.
The MAX3221EEAE+ is guaranteed to operate at data rates up to 250kbps while maintaining standard RS-232 output voltage levels.
No, the MAX3221EEAE+ contains an internal regulated dual charge pump that generates the necessary positive and negative voltages from a single +3.0V to +5.5V supply.