MAX3225CUP+T

Overview

The MAX3225CUP+T is a full-duplex RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and features AutoShutdown Plus technology, achieving a typical supply current of 1µA when inactive. The device guarantees a maximum data rate of 1Mbps (MegaBaud) and includes two drivers and two receivers. It utilizes a dual charge pump requiring four small capacitors for voltage generation. The component is housed in a 20-TSSOP package with an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by shutting down the device during periods of inactivity or cable disconnection.
• MegaBaud operation ensures reliable high-speed communication up to 1Mbps for demanding applications.
• Integrated dual charge pump generates required RS-232 voltages using minimal external capacitance.
• Logic-level READY output indicates when the internal charge pumps are regulating and the device is ready for transmission.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• Cellular Phones
• Battery-Powered Equipment
• Handheld Equipment
• Printers

Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the specific revision level aligns with design requirements. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and authenticity before finalizing procurement.

Selection Notes

Select this component for designs requiring low-power RS-232 interfaces in battery-operated systems. The 1Mbps data rate supports high-speed peripherals like ISDN modems. Verify that the 20-TSSOP package fits the PCB layout constraints. Ensure the system voltage falls within the 3.0V to 5.5V range. Consider the 0°C to +70°C temperature range for environmental suitability.

Part Context

This part belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of 3V-powered EIA/TIA-232 communications interfaces. The MAX3225 variant specifically distinguishes itself from the MAX3224/MAX3226 series by supporting higher data rates up to 1Mbps compared to their 250kbps limit. All devices in this family share the AutoShutdown Plus feature and similar pin configurations.

Replacement Considerations

Public confirmed substitutes include MAX3225EUP+T for extended temperature ranges and MAX3225CPP+ for through-hole packaging. Other family members like MAX3224CUP+ offer lower data rates but maintain compatibility.