ICL232CBET

Overview

The ICL232CBET is a low-power RS-232 transceiver manufactured by Renesas Electronics Corporation. It operates from a single +3V to +5.5V power supply and integrates on-chip voltage converters requiring only four external 0.1µF capacitors. The device features two drivers and two receivers, meeting EIA/TIA-232 and V.28/V.24 specifications at data rates up to 250kbps. It includes enhanced automatic power-down functionality that reduces standby current to approximately 1µA. The component provides ±15kV ESD protection on I/O pins and offers receiver hysteresis for improved noise rejection in harsh environments.

Feature Summary

• Integrated charge pump voltage converters eliminate the need for dual voltage supplies
• Enhanced automatic power-down mode significantly reduces standby power consumption
• Robust ±15kV ESD protection ensures reliability in electrostatically sensitive applications
• Receiver input hysteresis improves signal integrity and noise immunity

Applications

• Portable computers and notebook systems
• Handheld devices and PDAs
• Battery-powered instrumentation
• Peripherals such as printers and modems

Procurement Notes

Verify the specific suffix 'CBET' against official Renesas documentation to confirm package type, temperature range, and tape-and-reel specifications. Ensure compatibility with existing board layouts regarding capacitor placement and pin assignments. Confirm RoHS compliance status for the specific manufacturing batch prior to integration into final assemblies.

Selection Notes

Select this component when designing systems requiring low standby power and operation from a single 3V to 5.5V supply. It serves as a drop-in replacement for legacy MAX232-family devices. Consider its 250kbps data rate limit and 0.1µF external capacitor requirements when evaluating board space and performance constraints relative to higher-speed alternatives.

Part Context

The ICL232 series belongs to Renesas' portfolio of low-power RS-232 interface solutions derived from Intersil technology. These devices are engineered for portable electronics where power efficiency and board space are critical. The ICL232CBET specifically represents a variant within this family, maintaining compatibility with standard RS-232 protocols while offering modern power management features.

Replacement Considerations

Publicly confirmed direct pin-compatible replacements include the HIN232E and MAX232E. Verify electrical parameters and package dimensions before substitution to ensure functional equivalence in the target application.