MAX3224CUP+T

Overview

The MAX3224CUP+T is a dual RS-232 transceiver from Analog Devices/Maxim Integrated, housed in a 20-pin TSSOP package. It operates on a single +3.0V to +5.5V supply and achieves a typical supply current of 1µA via AutoShutdown Plus technology. The device guarantees a maximum data rate of 250kbps with two drivers and two receivers. It features a dual charge pump requiring only four 0.1µF capacitors for operation at 3.3V. The component includes a READY output indicating charge pump regulation status and supports full-duplex communication within an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates required RS-232 voltage levels using minimal external capacitance.
• READY output signal indicates when the internal charge pumps are regulating and the device is ready for transmission.

Applications

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

Procurement Notes

Verify that the ordering suffix 'C' corresponds to the commercial temperature range (0°C to +70°C) and 'UP' denotes the 20-TSSOP package. Confirm the '+' suffix indicates lead-free/RoHS compliance as specified in the manufacturer's documentation. Ensure the specific revision of the datasheet matches the production lot requirements for your design integration.

Selection Notes

Select this component for applications requiring low-power standby modes without BIOS modifications. The MAX3224 variant is suitable for systems needing up to 250kbps; choose MAX3225 variants if 1Mbps speeds are required. Verify that the 20-pin TSSOP footprint fits the PCB layout constraints and that the exposed pad grounding method aligns with thermal management strategies.

Part Context

This part belongs to the MAX3224–MAX3227 family of 3V-powered EIA/TIA-232 interfaces. It shares core architecture with the MAX3244/MAX3245 but differs in driver/receiver counts and specific data rate guarantees. The MAX3224 specifically provides two drivers and two receivers, distinguishing it from the triple/dual configurations found in other family members.

Replacement Considerations

Direct pin-compatible substitutes within the same family include MAX3224CPP+, MAX3224CAP+, and MAX3224CTP+. Variants such as MAX3225CUP+ offer identical packaging but support higher data rates. Cross-family replacements like the MAX3222EUP+ provide similar functionality with added ESD protection features.