MAX3223EEAP+TG071

Overview

The MAX3223EEAP+TG071 is a dual driver/receiver RS-232 transceiver from the MAX3223E family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and supports data rates up to 250kbps. The device features an AutoShutdown function that reduces supply current to 1µA when no valid signal is detected. It includes ±15kV ESD protection on all pins and utilizes a dual charge pump requiring four 0.1µF capacitors. The component is housed in a 20-pin SSOP package and is rated for operation between -40°C and +85°C.

Feature Summary

• AutoShutdown technology automatically disables the charge pump and drivers to achieve ultra-low 1µA standby current when the RS-232 cable is disconnected or peripheral transmitters are off.
• Integrated dual charge pumps generate internal +5.5V and -5.5V supplies from a single low-voltage source using only four small external capacitors.
• Enhanced electrostatic discharge protection ensures robustness against ±15kV Human Body Model, ±8kV IEC Contact Discharge, and ±15kV IEC Air-Gap Discharge events.

Applications

• Notebook, subnotebook, and palmtop computers
• Battery-powered equipment and handheld devices
• Cellular phones and peripherals

Procurement Notes

Verify the specific ordering suffix 'G071' against official manufacturer documentation to confirm tape-and-reel packaging specifications. Ensure the selected variant matches the required temperature range (-40°C to +85°C) and lead-free/RoHS compliance status before finalizing procurement orders.

Selection Notes

Select this component for applications requiring minimal power consumption during idle states without BIOS modifications. The MAX3223E provides two drivers and two receivers, making it suitable for full-duplex serial communication where space-saving SSOP packaging and high ESD immunity are critical design constraints.

Part Context

This part belongs to the MAX3221E/MAX3223E/MAX3243E family of 3V-powered RS-232 transceivers. While the MAX3221E offers one driver/receiver and the MAX3243E provides three drivers and five receivers, the MAX3223E specifically delivers a balanced 2/2 configuration optimized for standard serial port implementations.

Replacement Considerations

Public confirmed substitute part numbers include MAX3223EAP+ and MAX3223EIDBR.

FAQ

How does the AutoShutdown feature reduce power consumption?

When FORCEON is low and FORCEOFF is high, the device monitors receiver inputs. If no valid RS-232 levels are detected for 30µs, the onboard charge pump and drivers shut off, reducing supply current to 1µA until a valid signal reactivates the circuit.

What capacitor values are required for 3.3V operation?

For a +3.3V supply, the datasheet specifies that C1 through C4 should be 0.1µF capacitors to ensure proper charge pump operation and RS-232 output levels.

Does the device support mouse driveability?

The MAX3223E can drive serial mice, but because the AutoShutdown feature may interfere with mouse wake-up signals, FORCEOFF and FORCEON must be connected to VCC to keep the transmitters active continuously.