3232IV

Overview

The Intersil ICL3232IV is a dual RS-232 transceiver designed for single-supply operation. It operates within a voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device integrates two drivers and two receivers, enabling full-duplex communication at data rates up to 250 kb/s. It features low power consumption with a typical operating supply current of 1 mA. The component is housed in a 16-pin TSSOP package and supports surface mount installation. It functions reliably across an industrial temperature range from -40 °C to +85 °C.

Feature Summary

• Integrates two independent drivers and two receivers for full-duplex RS-232 communication on a single chip.
• Operates directly from a single 3 V to 5.5 V power supply without requiring external negative voltages.
• Includes internal charge pumps to generate the necessary positive and negative voltages for RS-232 signaling.
• Provides ±15 kV electrostatic discharge (ESD) protection on all RS-232 pins.

Applications

• Portable computers and laptops requiring serial port expansion.
• Personal digital assistants (PDAs) and handheld devices.
• Industrial control systems operating in harsh environments.
• Modems and communication equipment interfacing with microcontrollers.

Procurement Notes

Verify the specific suffix against the datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required ESD protection level and operational voltage range. Confirm moisture sensitivity levels and reflow soldering profiles before procurement.

Selection Notes

Select this component when a dual-channel RS-232 interface is needed for 3.3 V or 5 V systems. It is suitable for applications prioritizing low standby power and compact board space. Consider the TSSOP-16 package constraints for PCB layout. Verify compatibility with system ESD requirements given the integrated protection features.

Part Context

This device belongs to the ICL3232 family of RS-232 transceivers manufactured by Intersil, now part of Renesas Electronics. The series is known for meeting EIA/TIA-232 and V.28/V.24 standards while maintaining low power consumption. It serves as a bridge between TTL/CMOS logic levels and RS-232 signal levels.

Replacement Considerations

Check for direct pin-compatible alternatives such as the MAX3232 or SP3232 series. Verify that substitute components support the same 3 V to 5.5 V operating range and 250 kb/s data rate. Ensure equivalent ESD protection ratings and package dimensions are maintained.