MAX3224CAP+T

Overview

The MAX3224CAP+T is a dual RS-232 transceiver from Analog Devices/Maxim Integrated, housed in a 20-pin SSOP package. It operates on a single +3.0V to +5.5V supply with a typical shutdown current of 1µA via AutoShutdown Plus. The device guarantees a maximum data rate of 250kbps and features two drivers and two receivers for full-duplex communication. Internal dual charge pumps generate ±5.5V using four external 0.1µF capacitors. It includes a READY output indicating charge pump regulation and an INVALID output for signal detection. Operating temperature range is 0°C to +70°C.

Feature Summary

• AutoShutdown Plus technology automatically reduces supply current to 1µA when the interface is idle or disconnected.
• Integrated dual charge pump generates required RS-232 voltage levels without requiring external inductors.
• READY logic-level output indicates when the internal charge pumps are regulating and the device is ready for transmission.
• INVALID output detects valid RS-232 receiver input levels independent of shutdown control states.

Applications

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

Procurement Notes

Verify the component matches the specific 'C' suffix for the 0°C to +70°C commercial temperature range. Confirm the '+T' designation corresponds to the reel packaging format. Ensure the manufacturer is identified as Analog Devices Inc. or Maxim Integrated. Cross-reference the 20-pin SSOP physical dimensions against the official datasheet pinout diagram before integration.

Selection Notes

Select this part for applications requiring low-power standby modes in battery-operated systems. Choose the MAX3224 variant specifically if the design requires a guaranteed 250kbps data rate rather than the 1Mbps capability found in the MAX3225/MAX3227 series. Verify that the system can accommodate the four external 0.1µF capacitors required for the charge pump operation at 3.3V.

Part Context

This component belongs to the MAX3224–MAX3227 family of 3V-powered EIA/TIA-232 interfaces. It shares core architecture with the MAX3244 and MAX3245 but differs in driver/receiver counts and specific data rate guarantees. The MAX3224CAP+T represents the commercial grade version in SSOP packaging, distinct from the extended temperature E-series or alternative package types like TQFN and TSSOP.

Replacement Considerations

Public confirmed substitute part numbers: MAX3224EAP+, MAX3224CPP+, MAX3224CTP+, MAX3224CUP+. These variants share identical electrical specifications but differ in operating temperature ranges or physical package styles.