ICL3243EIA

Overview

The ICL3243EIA is an RS-232 transceiver manufactured by Renesas Electronics, operating within a supply voltage range of 3.0 V to 5.5 V. It integrates one driver and five receivers with a guaranteed data rate of 250 kbps. The device features automatic power-down functionality that reduces supply current to 1 mA in standby mode. It includes on-chip charge pumps requiring only four external 0.1 µF capacitors. ESD protection is rated at 15 kV per the human body model. The component is housed in a 28-pin SSOP package and supports operation across temperatures from -40°C to +85°C.

Feature Summary

• Automatic power-down feature reduces standby current to 1 µA when no valid RS-232 signal is detected
• Integrated dual charge pumps enable true RS-232 performance using small 0.1 µF external capacitors
• Enhanced electrostatic discharge protection rated at ±15 kV (human body model) for robust interface reliability

Applications

• Laptop and notebook computer serial port interfaces
• Battery-powered handheld devices and PDAs
• Peripheral equipment and printer connections

Procurement Notes

Verify the specific suffix 'EIA' against official Renesas documentation to confirm the exact package type and temperature grade. Ensure compatibility with system requirements for 3V to 5.5V operation and 250 kbps data rates. Confirm moisture sensitivity levels and storage conditions prior to assembly to maintain component integrity during manufacturing processes.

Selection Notes

Select this component for applications requiring low power consumption and high ESD protection in space-constrained designs. It serves as a drop-in replacement for similar MAXIM and SP series devices. Verify that the single driver and five receiver configuration meets the specific signal routing needs of the target circuit design.

Part Context

This part belongs to the ICL3243 family of RS-232 transceivers designed for low-voltage systems. It is compatible with 3.3V and 5.0V logic levels. The device is pin-compatible with competitors like MAX3243 and SP3243, facilitating direct upgrades for existing designs requiring improved power efficiency or enhanced ESD tolerance.

Replacement Considerations

Publicly confirmed substitutes include the MAX3243EEAI+ from Analog Devices/Maxim Integrated and the ST3243EB from STMicroelectronics. These alternatives offer similar functional specifications and pinouts for direct integration into existing hardware layouts.