MAX3238ECAI+T

Overview

The MAX3238ECAI+T 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 with a propagation delay of 0.15µs. It incorporates AutoShutdown Plus technology, reducing supply current to 1µA when no signal transitions are detected for 30 seconds. The component includes 15kV ESD protection on I/O and logic pins and utilizes internal dual charge pumps to generate required voltage levels.

Feature Summary

• AutoShutdown Plus functionality reduces power consumption by shutting down the onboard power supply and drivers after 30 seconds of inactivity.
• Integrated dual charge-pump power supply generates necessary voltage levels from a single low-voltage source.
• Includes an always-active complementary receiver output (R1OUTB) for monitoring external devices without forward biasing protection diodes.
• Provides high ESD protection ratings on both input/output and logic pins.

Applications

• Notebook, subnotebook, and palmtop computers
• High-speed modems
• Battery-powered equipment
• Hand-held equipment

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube packaging. Confirm the 'E' grade corresponds to the industrial temperature range (-40°C to +85°C). Ensure the manufacturer designation matches Analog Devices/Maxim Integrated specifications. Cross-reference the datasheet revision to confirm capacitor requirements and pinout consistency.

Selection Notes

Select this component for applications requiring low-power RS-232 interfaces in battery-operated systems. The AutoShutdown Plus feature is critical for extending battery life during periods of inactivity. Verify that the system logic levels are compatible with the specified input thresholds. Ensure the design accommodates the required external capacitors for the charge pump operation within the specified voltage range.

Part Context

This part belongs to the MAX3238E series of multichannel RS-232 line drivers and receivers. It is designed as a complete serial port solution for portable computing environments. The device integrates standard RS-232 signaling capabilities with advanced power management features not found in traditional transceivers.

Replacement Considerations

MAX3238EEAI+