MAX3222EEUP+TG071

Overview

The MAX3222EEUP+TG071 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 while maintaining EIA/TIA-232 output levels. It incorporates an internal dual charge pump requiring only four small capacitors. Enhanced ESD protection safeguards all transmitter outputs and receiver inputs to ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). A shutdown mode reduces supply current to less than 1μA, keeping receivers active for external monitoring.

Feature Summary

• Integrated dual charge pump enables true RS-232 performance from a single low-voltage supply without external inductors.
• Enhanced electrostatic discharge protection ensures robust operation against high-voltage static events on I/O pins.
• Ultra-low power shutdown mode significantly reduces consumption while maintaining receiver activity for system monitoring.

Applications

• Battery-powered portable equipment
• Cell phone and smartphone data cables
• Notebook and subnotebook computers

Procurement Notes

Verify the specific ordering suffix '+TG071' against the manufacturer's official documentation to confirm tape-and-reel packaging and lead-free compliance. Confirm that the component meets RoHS standards as indicated by the plus sign in the part number. Cross-reference the exact alphanumeric code with the distributor's catalog to ensure compatibility with existing inventory records.

Selection Notes

Select this component when designing systems requiring full-duplex RS-232 communication with strict space constraints. It is suitable for applications needing high ESD immunity and low standby power. Ensure the design accommodates the required four external capacitors for the charge pump. Verify that the operating temperature range of -40°C to +85°C aligns with the environmental requirements of the target application.

Part Context

This device belongs to the MAX3222E family of True RS-232 Transceivers. It is functionally compatible with industry-standard parts like the MAX242 but offers improved power efficiency and ESD protection. The 'EE' designation indicates an extended industrial temperature range, while 'UP' specifies the 20-pin TSSOP package. The suffix denotes specific manufacturing and packaging variations within the product line.

Replacement Considerations

The MAX3222ECUP+ serves as a commercial grade alternative with a 0°C to +70°C range. For pin-compatible replacements, verify the MAX3232E series, though it may have different driver/receiver counts or speed capabilities. Always consult the latest datasheet for functional equivalence before substitution.

FAQ

How does the shutdown mode affect receiver functionality?

In shutdown mode, the supply current drops below 1μA. However, the receivers remain active, allowing the device to monitor external signals even when the transmitters are disabled.

What is the maximum ESD protection rating for the I/O pins?

All transmitter outputs and receiver inputs are protected to ±15kV using the Human Body Model and ±8kV using the IEC 1000-4-2 Contact Discharge method.

Does this device support data rates higher than 250kbps?

No, the MAX3222E guarantees operation at data rates up to 250kbps. Higher speeds are available in other family members like the MAX3237E which supports MegaBaud operation.