DESCRIPTION

· The MAX3221E/MAX3223E/MAX3243E are 3V-powered EIA/TIA-232 and V.28/V.24 communication interfaces with automatic shutdown/wakeup features, high data-rate capabilities, and enhanced ESD protection.
· All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, to ±8kV using IEC 1000-4-2 Contact Discharge, and to ±15kV using the Human Body Model.
· The devices achieve a 1µA supply current with Maxim’s AutoShutdown™ feature, entering low-power shutdown mode when the RS-232 cable is disconnected or when the transmitters of the connected peripherals are off.
· The transceivers feature a proprietary low-dropout transmitter output stage, delivering true RS-232 performance from a +3.0V to +5.5V supply with a dual charge pump.
· The charge pump requires only four small 0.1µF capacitors for operation from a +3.3V supply.
· Each device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels.
· The MAX3221E contains one driver and one receiver, the MAX3223E has two drivers and two receivers, and the MAX3243E is a complete 3-driver/5-receiver serial port ideal for notebook or subnotebook computers.
· The MAX3243E includes two noninverting receiver outputs that are always active, allowing external devices to be monitored without forward biasing the protection diodes in circuitry that may be powered down.
· The devices are available in space-saving TQFN, SSOP, and TSSOP packages.

FEATURES

· 3V-powered EIA/TIA-232 and V.28/V.24 communication interfaces.
· Automatic shutdown/wakeup features.
· High data-rate capabilities up to 250kbps.
· Enhanced ESD protection: ±15kV (IEC 1000-4-2 Air-Gap Discharge), ±8kV (IEC 1000-4-2 Contact Discharge), ±15kV (Human Body Model).
· 1µA supply current with AutoShutdown™ feature.
· Proprietary low-dropout transmitter output stage.
· Dual charge pump requiring only four 0.1µF capacitors.
· Available in TQFN, SSOP, and TSSOP packages.

APPLICATIONS

· Notebook, Subnotebook, and Palmtop Computers.
· Cellular Phones.
· Battery-Powered Equipment.
· Handheld Equipment.
· Peripherals.
· Printers.
· Next Generation Device Features for Space-Constrained Applications.
· Data Cable Applications.