MAX3209EEUU

Overview

The MAX3209EEUU is a dual RS-232 serial port transceiver designed for motherboards and desktop PCs. It integrates two complete serial ports with six transmitters and ten receivers into a single 38-pin TSSOP package, eliminating the need for a negative power supply by utilizing an internal charge pump. The device operates from a +10.8V to +13.2V VDD supply and a +3V to +5.5V logic supply (VSTBY). It supports data rates up to 460kbps and features enhanced ESD protection rated at ±15kV Human Body Model and ±15kV IEC 1000-4-2 Air-Gap Discharge. A low-power standby mode draws a maximum of 100µA, keeping receivers R5 and R10 active for system wake-up capabilities.

Feature Summary

• Integrates dual RS-232 serial ports with six transmitters and ten receivers in a compact 38-pin TSSOP package
• Provides robust ESD protection meeting IEC 1000-4-2 standards with ±15kV air-gap and ±8kV contact discharge ratings
• Features a low-power standby mode that maintains receiver activity for automatic system wake-up while minimizing current consumption
• Eliminates external negative voltage requirements through an integrated charge pump structure

Applications

• Desktop PCs
• Motherboards
• Instruments
• Telecommunications equipment requiring IEC 1000-4-2 compliance
• Network servers

Procurement Notes

Verify the specific ordering suffix to confirm the temperature range and package type. The EE suffix indicates an extended industrial temperature range of -40°C to +85°C and a 38-pin TSSOP package. Ensure compatibility with the required logic supply voltage levels and confirm that the component meets the necessary environmental specifications for the intended deployment environment.

Selection Notes

Select this component when designing systems requiring dual RS-232 interfaces within space-constrained environments like motherboards. It is suitable for applications needing high ESD immunity without additional external protection components. Consider the 460kbps data rate limit and the requirement for a +12V supply rail alongside standard logic voltages when evaluating system power architecture.

Part Context

The MAX3209E belongs to Maxim Integrated's family of RS-232 transceivers designed for PC and peripheral applications. This specific part number represents the industrial-grade version packaged in a 38-pin Thin-Shrink Small Outline Package. It addresses the need for board space reduction and power efficiency in legacy serial communication interfaces.

Replacement Considerations

Cross-reference with other dual-port RS-232 transceivers offering similar ESD protection levels and pinout compatibility. Verify that alternative devices support the same data rates and standby wake-up functionality if system power management constraints remain unchanged.