MAX3224EAAP+T

Overview

The MAX3224EAAP+T is a dual RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single 3 V to 5.5 V supply and features AutoShutdown Plus technology, which automatically places the device in a low-power shutdown mode when the RS-232 bus is idle or powered down. The component supports data rates up to 1 Mbps and includes two drivers and two receivers for full-duplex communication. It is housed in an SSOP-20 package and functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown Plus functionality enables automatic power-down during idle bus conditions or absence of main power.
• Integrated charge pump circuitry generates required RS-232 voltage levels from a single low-voltage supply.
• Drivers provide output voltage regulation that remains stable regardless of load variations.

Applications

• Portable equipment requiring extended battery life through efficient power management
• Industrial control systems utilizing serial communication interfaces
• Modem and communications equipment designs

Procurement Notes

Verify the specific suffix EAAP against official manufacturer documentation to confirm pinout compatibility and thermal characteristics. Ensure the ordering information matches the exact package style and temperature grade required for the target application environment before finalizing procurement.

Selection Notes

Select this component for applications requiring robust RS-232 connectivity with minimal external capacitor count. The integrated AutoShutdown feature makes it suitable for battery-operated devices where standby current reduction is critical. Confirm that the 1 Mbps data rate meets the system's throughput requirements.

Part Context

This part belongs to the MAX322x family of RS-232 transceivers designed for single-supply operation. It shares functional similarities with other members like the MAX3223 and MAX3225 but offers specific driver/receiver configurations and packaging options tailored for space-constrained designs.

Replacement Considerations

Direct substitutes include the MAX3223EAP+T and MAX3225EAP+T. Verify pin-to-pin compatibility and ensure that differences in data rate specifications or package dimensions do not impact the existing board layout or performance requirements.

FAQ

What is the purpose of the AutoShutdown Plus feature?

It automatically turns off the drivers and charge pump when the RS-232 bus is idle or when the main power supply is removed, significantly reducing quiescent current.

Does the MAX3224EAAP+T require external capacitors?

Yes, it requires four small external tantalum or ceramic capacitors (typically 0.1 µF each) to support the internal charge pump circuitry.

What is the maximum data rate supported by this transceiver?

The device supports data rates up to 1 Mbps while maintaining reliable signal integrity over standard RS-232 cables.