MAX3225EETP+

Overview

The MAX3225EETP+ is a dual RS-232 transceiver from the MAX3224–MAX3227 family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and guarantees a data rate of 1Mbps. The device features AutoShutdown Plus technology, reducing supply current to 1µA when inputs are inactive for over 30 seconds. It includes two drivers and two receivers with full-duplex communication capability. The component is housed in a 20-pin TQFN-EP package and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by disabling charge pumps during periods of inactivity.
• MegaBaud operation ensures reliable high-speed data transmission up to 1Mbps.
• Integrated dual charge pump generates required internal voltages using only four small capacitors.
• READY output pin 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 the specific suffix EETP+ corresponds to the TQFN-EP package and industrial temperature grade (-40°C to +85°C) required for the design. Confirm RoHS compliance status as indicated by the plus sign in the part number. Ensure the ordering information matches the exact manufacturer designation to avoid compatibility issues with existing schematics.

Selection Notes

Select this model over the MAX3224 or MAX3226 variants if the application requires a guaranteed data rate of 1Mbps rather than 250kbps. The MAX3225 provides higher speed performance suitable for ISDN modem communications while maintaining the same low-power shutdown features and package options as the rest of the family.

Part Context

This component belongs to the MAX3224–MAX3227 series of 3V-powered RS-232 transceivers. It shares core architectural features such as the AutoShutdown Plus circuit and dual charge pump with siblings like the MAX3224 and MAX3226. The primary distinction lies in the guaranteed maximum data rate, where the MAX3225 supports 1Mbps compared to the 250kbps limit of other members in the group.

Replacement Considerations

The MAX3225CETP+ serves as the commercial temperature variant (0°C to +70°C) of this component. Other family members like the MAX3224EETP+ offer identical packaging but are limited to 250kbps data rates. Verify thermal requirements before substituting with lower-grade temperature versions.