MAX3222EETP+T

Overview

The MAX3222EETP+T is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and features two drivers and two receivers for full-duplex communication. The device guarantees data rates up to 250kbps with worst-case loads of 3kΩ in parallel with 1000pF. It incorporates an internal dual charge pump requiring only four 0.1μF capacitors. ESD protection is rated at ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). A shutdown mode reduces supply current to 1μA while keeping receivers active. It is housed in a 20-pin TQFN package with an exposed pad.

Feature Summary

• Internal dual charge pump generates required voltage levels from a single low-voltage supply using minimal external components.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events without latch-up.
• Ultra-low power shutdown mode significantly reduces consumption while maintaining receiver monitoring capability.

Applications

• Battery-powered portable equipment
• Cell phone and smartphone serial interfaces
• Notebook, subnotebook, and palmtop computers

Procurement Notes

Verify the specific suffix EE indicates the extended temperature range (-40°C to +85°C) and TP denotes the TQFN package type. Confirm RoHS compliance status as indicated by the plus sign. Ensure the source document matches the manufacturer's official datasheet for the MAX3222E series to validate pinout and electrical characteristics before integration.

Selection Notes

Select this component when designing systems requiring RS-232 connectivity with strict power constraints. The 1μA shutdown current makes it suitable for battery-operated devices where standby power is critical. Verify that the 250kbps data rate meets application requirements, as higher speeds are not supported in the standard operating mode.

Part Context

This part belongs to the MAX3222E family of low-power RS-232 transceivers. It is functionally compatible with industry-standard parts like the MAX242 but offers improved power efficiency and ESD protection. The 'E' suffix specifies the industrial temperature range, distinguishing it from commercial variants.

Replacement Considerations

Direct functional replacements within the same family include MAX3222ECAP+T (SSOP) or MAX3222EEUP+T (TSSOP), provided the package footprint allows. Cross-family substitutes require verification of pin compatibility and voltage levels.

FAQ

How does the shutdown mode affect the receiver outputs?

In shutdown mode (SHDN = GND), the transmitter outputs enter a high-impedance state, but the receivers remain active to monitor external signals while consuming only 1μA of supply current.

What is the maximum data rate guaranteed for this device?

The MAX3222E guarantees operation at data rates up to 250kbps while maintaining RS-232 output levels under worst-case load conditions.

Does the device support MegaBaud operation?

No, MegaBaud operation (1Mbps) is a feature specific to the MAX3237E variant within this family. The MAX3222E is limited to 250kbps.