ICL3243EIVZ-T

Overview

The ICL3243EIVZ-T is a full-duplex RS-232 transceiver manufactured by Renesas Electronics Corporation. It integrates three drivers and five receivers within a 28-pin TSSOP package. The device operates on a single 3V to 5.5V supply and supports data rates up to 250kbps. Key electrical specifications include a receiver hysteresis of 500mV and ±15kV ESD protection on all RS-232 pins per IEC61000-4-2 standards. It functions within an industrial temperature range of -40°C to +85°C and features automatic power-down circuitry to minimize standby current.

Feature Summary

• Automatic power-down functionality that reduces system power consumption when the RS-232 cable is disconnected or peripheral devices are powered off.
• Integrated charge pump design enabling operation from a single low-voltage supply while meeting EIA/TIA-232 voltage requirements.
• Robust electrostatic discharge protection rated at ±15kV for both air gap and human body models on driver outputs and receiver inputs.

Applications

• Portable computing devices such as laptops and notebooks requiring compact serial port solutions.
• Personal digital assistants (PDAs) and handheld computers where low standby power is critical.
• Industrial control systems operating in environments with potential electrostatic discharge exposure.

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration during procurement. Confirm the 'E' designation aligns with the extended temperature range (-40°C to +85°C) required for the application environment. Ensure compatibility with RoHS3 compliance standards if environmental regulations apply to the manufacturing process. Cross-reference the manufacturer part number with distributor codes to avoid ordering errors related to package variations.

Selection Notes

Select this component when a full-duplex interface with multiple receive lines is necessary for complex serial communication protocols. The inclusion of five receivers allows for connection to multiple peripherals or daisy-chained devices without additional buffering. Consider the 28-TSSOP footprint for PCB layout constraints, ensuring adequate clearance for external charge pump capacitors. Verify that the 250kbps speed meets the maximum baud rate requirements of the connected equipment.

Part Context

This part belongs to the Intersil ICL32xxE series, now produced under Renesas Electronics following corporate acquisitions. The series is designed for portable electronics needing reliable RS-232 connectivity with minimal power draw. The ICL3243 variant specifically provides a complete serial port solution with enhanced driver and receiver counts compared to simpler dual-driver models.

Replacement Considerations

The ICL3241EIVZ is a compatible alternative within the same family, offering identical electrical characteristics and pinout but lacking the extra receiver count. Verify that the replacement maintains the same 28-TSSOP package dimensions and thermal performance specifications for direct board substitution.