MAX3232IDE4

Overview

The MAX3232IDE4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device features two drivers and two receivers for full-duplex communication with a data rate up to 250 kb/s. It utilizes small external capacitors and includes ±15-kV ESD protection on all RS-232 lines. The component is housed in a 16-pin SOIC-Wide package and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated ±15-kV electrostatic discharge (ESD) protection on transmit and receive lines
• Low-power design with typical 1 mA supply current during active operation
• Requires only four 0.1 µF external charge pump capacitors
• True RS-232 performance with guaranteed output voltages from 3 V to 5.5 V supplies

Applications

• Industrial control systems requiring robust serial communication
• Portable battery-powered equipment utilizing low-voltage logic
• Modems and facsimile machines
• Point-of-sale terminals and handheld data collection devices

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free packaging compliance when sourcing. Confirm the package variant matches the required PCB footprint, as the base part number may be available in other packages such as TSSOP or PDIP. Check manufacturer lifecycle status for obsolescence warnings before finalizing procurement plans.

Selection Notes

Select this component when full-duplex RS-232 communication is required with high ESD immunity. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range. Verify that the board layout can accommodate the necessary four external capacitors for the internal charge pump circuitry.

Part Context

This part belongs to the MAX3232 family of low-power RS-232 transceivers. The 'I' designation specifies the industrial temperature grade, while 'DE4' identifies the 16-pin SOIC-Wide package and lead-free manufacturing process. It serves as a direct replacement for older generations of RS-232 drivers in space-constrained designs.

Replacement Considerations

The TRS3232EIDR is a confirmed parameter-equivalent substitute from Texas Instruments. Other compatible options include the ICL3232ECBNZ from Renesas Electronics Corporation. Verify pinout compatibility and capacitor requirements when transitioning between these alternatives.