MAX3225EEPP+

Overview

The MAX3225EEPP+ 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 guarantees a data rate of 1Mbps. The device features AutoShutdown Plus technology, which reduces supply current to 1µA when the cable is disconnected or 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 PDIP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically enters low-power shutdown mode upon detecting inactivity or disconnection, waking up upon valid signal transitions without BIOS changes.
• MegaBaud operation ensures reliable 1Mbps data rates suitable for high-speed applications like ISDN modem communications.
• Integrated dual charge pump generates required internal voltages using only four small capacitors, enabling true RS-232 performance from low-voltage supplies.

Applications

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

Procurement Notes

Verify the specific suffix EEPP against official documentation to confirm the 20-pin PDIP package and industrial temperature rating (-40°C to +85°C). Confirm lead-free/RoHS compliance status as indicated by the '+' designation. Check for product discontinuance notices or lifecycle status updates prior to finalizing procurement plans.

Selection Notes

Select this component for designs requiring 1Mbps RS-232 communication with minimal power consumption during idle states. Ensure the system architecture accommodates the 20-pin PDIP footprint. Verify that external capacitor values meet the minimum requirements specified for the chosen supply voltage to maintain stable charge pump operation.

Part Context

This part belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of RS-232 transceivers. While sharing core AutoShutdown Plus and MegaBaud features, variants differ in driver/receiver counts and guaranteed data rates. The MAX3225 specifically provides two drivers and two receivers with 1Mbps speed, distinguishing it from 250kbps models in the series.

Replacement Considerations

Direct functional substitutes within the same family include MAX3225EUP+ (TSSOP) or MAX3225ETP+ (TQFN), provided pin compatibility and package constraints allow. Cross-package replacements require careful review of pin assignments and thermal dissipation characteristics.