MAX3237EEAI+

Overview

The MAX3237EEAI+ is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-pin SSOP package. It operates on a single +3.0V to +5.5V supply and features five drivers and three receivers for full-duplex communication. The device supports data rates up to 250kbps normally, with MegaBaud mode enabling 1Mbps transmission. It incorporates an internal dual charge pump requiring only four 0.1μF capacitors. Supply current is typically 2mA, dropping to 10nA in shutdown mode when inputs are invalid. Logic and receiver I/O pins provide ±15kV ESD protection.

Feature Summary

• Integrated dual charge pump enables true RS-232 performance using only four small external capacitors
• Enhanced electrostatic discharge protection on all logic and RS-323 I/O pins ensures robust operation
• Ultra-low power consumption with shutdown mode reducing supply current to 10nA
• MegaBaud operating mode allows high-speed serial communications at 1Mbps

Applications

• Peripheral applications requiring fast data transfer
• Battery-powered equipment
• Cell-phone data cables
• Notebook, subnotebook, and palmtop computers

Procurement Notes

Verify the specific ordering suffix EEAI+ corresponds to the -40°C to +85°C temperature range and SSOP-28 package configuration. Confirm lead-free and RoHS compliance status through official manufacturer documentation or authorized distributor specifications before finalizing procurement orders.

Selection Notes

Select this component for designs requiring five transmitter outputs and three receiver inputs within a compact SSOP footprint. Ensure the application utilizes a +3.0V to +5.5V supply voltage. Verify that the required data rate aligns with either standard 250kbps or MegaBaud 1Mbps modes based on load capacitance constraints.

Part Context

This device belongs to the MAX3237E series of low-power RS-232 transceivers. It shares architectural similarities with the MAX3222E, MAX3232E, and MAX3241E but is specifically optimized for peripheral interfaces needing multiple driver channels. The EE suffix denotes extended industrial temperature performance.

Replacement Considerations

MAX3237EAI+T

FAQ

How does the MAX3237EEAI+ achieve ultra-low power consumption?

The device enters a shutdown mode where supply current drops to 10nA (typical) when all receiver inputs are in the invalid range (-0.3V < R_IN < +0.3V).

What is the function of the MBAUD pin?

Connecting the MBAUD pin to VCC enables MegaBaud mode, allowing the transmitters to guarantee a 1Mbps data rate under specified load conditions.

Does the MAX3237EEAI+ require external components for voltage generation?

Yes, it requires four small 0.1μF external capacitors to operate the internal dual charge pump that generates the necessary positive and negative voltages.