MAX3224CAP

Overview

The MAX3224CAP+ is a dual RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-pin SSOP package. It operates on a single +3.0V to +5.5V supply and achieves a typical supply current of 1µA through AutoShutdown Plus technology. The device guarantees a maximum data rate of 250kbps and features two drivers and two receivers for full-duplex communication. It includes an internal dual charge pump requiring only four small capacitors, along with logic-level outputs such as READY and INVALID for system status monitoring.

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 from low-voltage supplies using minimal external components.
• Logic-level output signals provide real-time status regarding charge pump regulation and valid signal detection.

Applications

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

Procurement Notes

Verify the specific suffix 'CAP+' corresponds to the 20-pin SSOP package and commercial temperature range (0°C to +70°C). Confirm lead-free/RoHS compliance status directly with the manufacturer documentation. Ensure ordering details match the exact pinout and electrical specifications required for the target application design.

Selection Notes

Select this component for applications requiring low-power standby modes without BIOS modifications. Choose the MAX3224 variant specifically when a guaranteed 250kbps data rate is sufficient, as opposed to the 1Mbps capability found in the MAX3225 series. Verify that the 20-pin SSOP footprint aligns with the PCB layout constraints.

Part Context

This part belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of 3V-powered EIA/TIA-232 interfaces. While sharing core AutoShutdown Plus architecture, the MAX3224 is distinguished by its 250kbps speed guarantee compared to the 1Mbps performance of the MAX3225. It serves as a low-power alternative to standard RS-232 transceivers in portable electronics.

Replacement Considerations

The MAX3224EAP+ offers identical functionality within an extended industrial temperature range (-40°C to +85°C). For higher-speed requirements, the MAX3225CAP+ provides 1Mbps operation. Other family members like the MAX3226CAP+ share the same package but differ in driver/receiver counts.