MAX3225CAP+

Overview

The MAX3225CAP+ is a dual RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and achieves a typical supply current of 1µA through the AutoShutdown Plus feature. The device guarantees a data rate of 1Mbps, supporting high-speed applications like ISDN modem communication. It includes two drivers and two receivers for full-duplex operation. The component utilizes a dual charge pump requiring only four small capacitors for voltage generation. It is housed in a 20-pin SSOP package and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown Plus technology automatically reduces power consumption when the interface is idle or disconnected.
• MegaBaud capability ensures reliable 1Mbps transmission speeds for demanding serial communication tasks.
• Integrated dual charge pump generates required RS-232 voltages using minimal external components.
• INVALID output pin provides real-time status indication regarding valid RS-232 signal presence.

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 grade (0°C to +70°C). Confirm RoHS compliance status as indicated by the plus sign. Ensure the source document matches the official Analog Devices datasheet for the MAX3224–MAX3227 family to validate electrical characteristics and pin configurations before integration.

Selection Notes

Select this component when a 1Mbps data rate is required for RS-232 interfaces powered by 3V to 5.5V supplies. It is suitable for designs prioritizing low standby power via AutoShutdown Plus. Compare against MAX3224 or MAX3226 if a lower 250kbps rate suffices, or consider ESD-protected variants like MAX3225EUP+ for environments requiring higher input protection levels.

Part Context

This part belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of 1µA, 1Mbps RS-232 transceivers. The MAX3225 variant specifically distinguishes itself with a 1Mbps guaranteed data rate, whereas siblings like the MAX3224 are limited to 250kbps. All devices share the same core architecture featuring AutoShutdown Plus and dual charge pumps.

Replacement Considerations

Public confirmed substitutes include MAX3225EUP+ and MAX3225CPP+. Verify package compatibility and temperature range specifications when substituting.