MAX3226EAAE+

Overview

The MAX3226EAAE+ is a single-channel RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a +3.0V to +5.5V supply and guarantees a data rate of 250kbps. The device features AutoShutdown Plus technology, achieving a typical supply current of 1μA when inactive. It includes one driver and one receiver with full-duplex communication capability. ESD protection is rated at ±15kV (Air-Gap) and ±8kV (Contact). The component is housed in a 16-pin SSOP package and supports an extended operating temperature range from -40°C to +125°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by entering low-power shutdown mode during periods of inactivity or cable disconnection.
• Integrated dual charge pump generates internal +5.5V and -5.5V supplies using only four small external capacitors.
• Enhanced I/O protection safeguards transmitter outputs and receiver inputs against high-voltage electrostatic discharge events.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• Cellular Phones and Battery-Powered Equipment
• Hand-Held Equipment and Peripherals
• Printers and Automotive Systems

Procurement Notes

Verify the specific suffix 'AAE' confirms the -40°C to +125°C industrial temperature rating and SSOP-16 packaging. Confirm RoHS compliance status via the manufacturer's official documentation before finalizing procurement orders.

Selection Notes

Select this model for applications requiring a single channel with guaranteed 250kbps performance. Ensure the design accommodates the required four 0.1μF capacitors for the charge pump. Verify that the +3.0V to +5.5V voltage range aligns with the system power architecture.

Part Context

This component belongs to the MAX3224E–MAX3245E family of 3V-powered RS-232 interfaces. Unlike the MAX3227E within the same series, which supports 1Mbps speeds, the MAX3226E is optimized for 250kbps operation while maintaining identical power management and protection features.

Replacement Considerations

The MAX3226EEAE+ serves as a direct functional replacement within the same product family, offering identical electrical specifications but potentially differing in thermal resistance or manufacturing lot variations.

FAQ

How does the AutoShutdown Plus feature determine when to enter low-power mode?

The device enters shutdown mode if no valid signal transition is detected on any receiver or transmitter input for more than 30 seconds, or if the RS-232 cable is disconnected.

What is the function of the READY output pin?

The READY output asserts high when the internal charge pumps are regulating and the device has generated sufficient voltage to begin transmitting RS-232 signals.

How many external capacitors are required for operation?

Four small 0.1μF capacitors are required to support the dual charge pump voltage converter for operation from a 3.3V supply.