MAX3223EEPP

Overview

The MAX3223EEPP+ is a dual RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-pin plastic DIP package. It operates from a single +3.0V to +5.5V supply and supports data rates up to 250kbps. The device incorporates AutoShutdown technology, reducing supply current to 1µA when the cable is disconnected or peripherals are off. It features ±15kV ESD protection on all I/O pins and includes two drivers and two receivers for full-duplex communication.

Feature Summary

• AutoShutdown functionality reduces power consumption by disabling charge pumps and drivers during idle periods.
• Integrated dual charge pump generates required internal voltages using only four small external capacitors.
• Robust electrostatic discharge protection ensures reliability against human body model and IEC contact/air-gap discharges.

Applications

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

Procurement Notes

Verify the specific suffix EEPP indicates the -40°C to +85°C temperature range and 20-pin PDIP package configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ordering details match the exact component designation to avoid functional discrepancies.

Selection Notes

Select this component for applications requiring low-power standby modes and high ESD tolerance in space-constrained designs. Verify that the 250kbps data rate meets system requirements. Ensure the 20-pin DIP footprint aligns with the target PCB layout constraints.

Part Context

This part belongs to the MAX3221E/MAX3223E/MAX3243E family of true RS-232 transceivers. It shares core architectural features with other members, such as the MAX3221E (single driver) and MAX3243E (triple driver), while differing in pin count and driver/receiver configuration.

Replacement Considerations

Publicly confirmed substitutes include the MAX3223ECAP+, MAX3223EEAP+, and MAX3223EEUP+. Verify package compatibility and electrical specifications before substitution.

FAQ

How does the AutoShutdown feature operate?

The device enters a low-power shutdown mode when no valid RS-232 signal levels are detected on receiver inputs for 30µs, reducing supply current to 1µA. It wakes up automatically upon detection of a valid signal.

What is the ESD protection rating?

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

What external components are required for operation?

The device requires four small 0.1µF capacitors for the dual charge pump when operating from a +3.3V supply. A VCC bypass capacitor is also recommended.