MAX232DE4

Overview

The MAX232DE4 is a dual driver and receiver RS-232 transceiver manufactured by Texas Instruments. It operates on a single 5 V supply, utilizing internal charge pumps to generate the required ±10 V levels for EIA/TIA-232-F compliance. The device supports data rates up to 120 kbps with full-duplex communication. It features two drivers and two receivers in a 16-pin SOIC package. Key electrical parameters include a supply voltage range of 4.5 V to 5.5 V, an operating current of 10 mA, and a propagation delay of 0.5 µs. The component is designed for surface-mount installation.

Feature Summary

• Integrates dual drivers and dual receivers for complete RS-232 signal conversion
• Utilizes internal charge pumps to eliminate the need for external negative voltage supplies
• Provides built-in electrostatic discharge (ESD) protection on input and output pins

Applications

• Serial port interfacing between microcontrollers and personal computers
• Modem control circuits requiring RS-232 level translation
• Industrial equipment serial communication interfaces

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free packaging compliant with RoHS standards. Confirm the package type matches the design requirements, as variations exist within the MAX232 family. Check for obsolescence status, as older variants may be discontinued. Ensure the supplier provides valid traceability documentation for industrial applications.

Selection Notes

Select this component when a standard 5 V logic interface is required for RS-232 communication. It is suitable for designs where space constraints favor a single-chip solution over discrete transistor implementations. Consider the 120 kbps speed limit; higher-speed applications may require alternative devices like the MAX3232. Verify that the 16-pin SOIC footprint aligns with the PCB layout capabilities.

Part Context

The MAX232DE4 belongs to the broader MAX232 series of dual drivers/receivers. The 'D' suffix denotes the SOIC package, while 'E4' typically signifies environmental compliance. This part serves as a foundational interface solution for legacy serial protocols, bridging TTL/CMOS logic levels with standard RS-232 voltage swings in embedded systems.

Replacement Considerations

MAX232DR: Standard tape-and-reel version of the same functional device. MAX232IDG4: Industrial temperature grade variant in a similar package. MAX3232: Higher speed (250 kbps) and lower power alternative supporting 3.3 V systems.