ICL3243EIAZ-T7A

Overview

The ICL3243EIAZ-T7A is a low-power RS-232 transceiver manufactured by Renesas Electronics. It integrates three drivers and five receivers, supporting full-duplex communication with a data rate of 250 kb/s. The device operates within a supply voltage range of 3 V to 5.5 V and draws a typical operating current of 1 mA. It features ±15 kV ESD protection on the RS-232 pins and utilizes an automatic powerdown function to minimize standby consumption. The component is housed in a 28-pin SSOP package and is rated for operation between -40 °C and +85 °C.

Feature Summary

• Integrates three independent drivers and five independent receivers for comprehensive serial communication.
• Features an automatic powerdown circuit that reduces supply current to 1 µA during idle periods.
• Provides robust ±15 kV electrostatic discharge protection on all RS-232 signal lines.

Applications

• Portable computing devices such as PDAs and palmtops requiring low standby power.
• Industrial equipment utilizing ISDN terminal adaptors.
• Peripheral interfaces in notebook and laptop computers.

Procurement Notes

Verify the specific suffix T7A indicates reel packaging when sourcing. Confirm the manufacturer designation as Renesas Electronics Corporation, noting the historical Intersil lineage. Ensure the SSOP-28 package matches the design footprint requirements. Cross-reference the RoHS compliance status with the latest official documentation before finalizing procurement orders.

Selection Notes

Select this component for applications requiring multiple transmit and receive channels within a single IC. The 250 kb/s speed is suitable for standard asynchronous serial links. The wide supply voltage range supports both 3.3 V and 5 V logic systems. Consider the automatic powerdown feature if battery life or thermal management in enclosed spaces is a primary design constraint.

Part Context

This part belongs to the ICL32XXE family of low-power RS-232 transceivers designed for 3V to 5.5V operation. It serves as a direct replacement for legacy parts like the MAX207E and HIN207E. The series is characterized by latch-up immunity and efficient on-chip charge pumps that allow operation with small external capacitors.

Replacement Considerations

Publicly confirmed substitutes include the MAX207E, HIN207E, and HIN237E. Verify pin compatibility and electrical specifications against the target datasheet before implementing any cross-brand substitution.