ICL3237ECA-T

Overview

The ICL3237ECA-T is a low-power RS-232 transceiver manufactured by Renesas Electronics. It integrates five drivers and three receivers in a single package, supporting full-duplex communication at data rates up to 1 Mb/s. The device operates from a single 3 V to 5.5 V supply and features an automatic power-down mode that reduces supply current to approximately 1 µA when no valid signal is present on the receiver inputs. It includes internal charge pumps requiring only external 0.1 µF capacitors for operation. The component provides 15 kV ESD protection on all RS-232 lines and meets TIA/EIA-232-F standards.

Feature Summary

• Integrates five independent drivers and three independent receivers for comprehensive serial interface connectivity.
• Features an automatic power-down mode that significantly reduces quiescent current during idle periods.
• Provides robust 15 kV human body model ESD protection across all RS-232 signal lines.
• Utilizes internal charge pump circuitry to generate required voltage levels using minimal external components.

Applications

• Industrial control systems requiring reliable serial communication over long distances.
• Portable battery-powered equipment utilizing low standby current modes.
• Data acquisition systems interfacing with PC-based controllers via RS-232 ports.

Procurement Notes

Verify the manufacturer designation as Renesas Electronics or Intersil, as legacy branding may appear on older production runs. Confirm the suffix indicates tape-and-reel packaging if reel handling is required for assembly. Check RoHS compliance status against specific revision codes, as historical variants may differ in environmental certification requirements.

Selection Notes

Select this component when five transmit channels and three receive channels are necessary within a single IC footprint. Ensure the application environment remains within the specified 0°C to +70°C operating temperature range. Verify that the system power supply voltage falls between 3 V and 5.5 V to guarantee proper logic level translation and driver output swing characteristics.

Part Context

This part belongs to the ICL3237 family of true RS-232 transceivers. It shares functional similarities with other multi-driver RS-232 devices but is distinguished by its specific combination of five drivers and three receivers alongside the integrated auto-shutdown feature. The device represents a transition point where Intersil technology was integrated into Renesas' portfolio following corporate acquisitions.

Replacement Considerations

MAX3237ECPWR serves as a pin-compatible alternative offering similar electrical specifications and functionality from Texas Instruments. Both devices support the same voltage range and data rates, facilitating direct substitution in designs where sourcing flexibility is required.