MAX3244EEAI+T

Overview

The MAX3244EEAI+T is a single-transmitter, single-receiver RS-232 transceiver from Analog Devices/Maxim Integrated. It operates on a +3.0V to +5.5V supply and achieves 1µA shutdown current via AutoShutdown Plus. The device guarantees a 250kbps data rate with ±5V transmitter output swings. It features an INVALID signal detector, READY status output, and FORCEON/FORCEOFF control pins. The EE suffix denotes an extended temperature range of -40°C to +85°C. The AI suffix indicates a TSSOP-28 package. It includes a dual charge pump requiring four 0.1µF capacitors for 3.3V operation.

Feature Summary

• AutoShutdown Plus technology reduces supply current to 1µA when inputs are inactive for over 30 seconds
• INVALID output detects valid RS-232 voltage levels independent of power-down states
• READY output asserts high when charge pumps regulate and the device is ready for transmission
• FORCEON and FORCEOFF inputs allow manual override of automatic shutdown modes

Applications

• Notebook and subnotebook computers
• Cellular phones and handheld equipment
• Battery-powered peripherals and printers

Procurement Notes

Verify the ordering suffix matches the required specifications. The 'E' suffix confirms the extended industrial temperature range of -40°C to +85°C. The 'I' suffix specifies the TSSOP-28 package type. Confirm the '+' suffix indicates lead-free and RoHS compliance. Ensure the component source is authorized to guarantee authenticity and traceability.

Selection Notes

Select this part for applications requiring low-power standby modes in battery-operated systems. It is suitable for interfaces needing automatic wake-up capabilities without BIOS modifications. Choose this model over standard variants if extended temperature operation or specific package constraints are necessary. Verify that the 250kbps data rate meets system requirements, as higher-speed variants exist within the family.

Part Context

This component belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of 3V-powered RS-232 transceivers. The MAX3244 variant specifically provides one driver and one receiver with mouse driveability features. It shares core technologies like AutoShutdown Plus and MegaBaud operation with sibling devices, differing primarily in channel count and guaranteed data rates.

Replacement Considerations

Direct pin-compatible substitutes include other members of the MAX324x family such as the MAX3245, which offers 1Mbps operation. For lower data rate needs, the MAX3224 or MAX3226 may serve as alternatives. Ensure any replacement maintains the same package type and temperature rating.