ICL3244ECV-T

Overview

The Intersil ICL3244ECV-T is a low-power RS-232 transceiver designed for operation with supply voltages ranging from 3.0V to 5.5V. It integrates three drivers and five receivers, ensuring compliance with EIA/TIA-232 and V.28/V.24 specifications even at the minimum 3.0V supply level. The device features an efficient on-chip charge pump that eliminates the need for external voltage sources. It supports data rates up to 250kbps and includes automatic powerdown functionality to reduce standby current to approximately 1µA when no valid signal is detected. The component provides ±15kV electrostatic discharge (ESD) protection on RS-232 pins.

Feature Summary

• Integrates three drivers and five receivers for comprehensive serial port connectivity
• Features automatic powerdown circuitry to minimize standby power consumption
• Provides robust ±15kV ESD protection on all RS-232 input and output pins
• Operates reliably across a wide supply voltage range of 3.0V to 5.5V

Applications

• Portable computers and notebook systems requiring low standby power
• Personal digital assistants (PDAs) and palmtop devices
• Battery-powered industrial equipment with serial communication needs
• ISDN terminal adaptors and peripheral interfaces

Procurement Notes

Verify the specific suffix 'CV-T' indicates the TSSOP-20 package and tape-and-reel packaging format. Confirm RoHS compliance status as manufacturing processes evolve. Ensure the source document explicitly lists this exact part number to avoid confusion with similar variants in the ICL324x family. Cross-reference pinouts if substituting from older non-E versions.

Selection Notes

Select this component when a single IC must provide multiple transmit and receive channels for RS-232 communication. It is suitable for designs requiring automatic power management to extend battery life in portable applications. Verify that the required data rate does not exceed 250kbps and that the system operates within the 3.0V to 5.5V voltage window. Ensure sufficient board space for the necessary external capacitors for the charge pump.

Part Context

This device belongs to the Intersil ICL32xE series of low-power RS-232 transceivers. The series is characterized by its ability to operate at lower voltages than traditional 5V-only parts while maintaining full standard compliance. The ICL3244 variant specifically offers a high channel count (3 drivers, 5 receivers) compared to simpler dual-driver options, making it ideal for complex serial interfaces in compact form factors.

Replacement Considerations

Direct replacements include other members of the ICL324x family such as the ICL3241E or ICL3245E, provided the driver/receiver counts and package types are compatible. Verify that any substitute also supports the 3.0V minimum operating voltage and automatic powerdown feature if these are critical design requirements.