ICL3237EIA-T

Overview

The ICL3237EIA-T is a true RS-232 transceiver manufactured by Intersil, now part of Renesas Electronics. It operates on a single power supply ranging from 3 V to 5.5 V and supports data rates up to 1 Mb/s. The device integrates five drivers and three receivers in full-duplex configuration. It features an automatic powerdown function that reduces standby current to approximately 1 mA during idle periods. The component provides ±15 kV electrostatic discharge protection on RS-232 lines and complies with EIA/TIA-232 standards. It is housed in a 28-pin SSOP package suitable for surface mount applications.

Feature Summary

• Integrated automatic powerdown circuitry significantly reduces standby power consumption when the interface is inactive.
• Provides robust ±15 kV electrostatic discharge protection on all RS-232 input and output pins.
• Supports operation across a wide voltage range from 3.0 V to 5.5 V using small external capacitors.

Applications

• Portable computing devices such as PDAs and palmtops requiring low power interfaces.
• ISDN terminal adaptors and communication peripherals.
• Notebook and laptop computer serial port implementations.

Procurement Notes

Verify the specific suffix against manufacturer documentation to confirm temperature grade and packaging format. Ensure compatibility with existing board space constraints due to the SSOP-28 footprint. Confirm moisture sensitivity level handling requirements prior to assembly. Cross-reference ordering information with current Renesas product listings for availability.

Selection Notes

Select this component when designing systems requiring five transmit channels and three receive channels within a compact form factor. It serves as a direct replacement for legacy MAX207E or HIN207E devices in 5V systems while supporting lower 3V logic levels. Evaluate capacitor sizing requirements based on the chosen operating frequency and supply voltage stability.

Part Context

This device belongs to the ICL32XXE family of low-power RS-232 transceivers designed for battery-operated equipment. The series emphasizes reduced standby current through intelligent power management circuits. It bridges the gap between standard RS-232 signaling and modern low-voltage digital logic environments.

Replacement Considerations

The Maxim Integrated MAX3237ECAI-T is a confirmed functional substitute offering identical pinout and electrical specifications. Verify package tolerance differences between SSOP variants before physical integration.