ICL3217CB-T

Overview

The Intersil ICL3217CB-T is a low-power RS-232 transceiver designed for operation with supply voltages ranging from +3V to +5.5V. It integrates one driver and three receivers, supporting data rates up to 500 kb/s while consuming only 1 mA of active supply current. The device features an automatic powerdown function that reduces standby current to approximately 1 µA when no valid RS-232 signal is detected on the receiver inputs. It includes integrated charge pumps requiring only small external capacitors and provides ±15 kV ESD protection on RS-232 I/O pins. The component meets EIA/TIA-232 and V.28/V.24 specifications at 3V operation.

Feature Summary

• Automatic powerdown circuitry significantly reduces standby power consumption by detecting idle receiver states.
• Integrated charge pumps eliminate the need for external inductors, enabling compact board layouts.
• Robust electrostatic discharge protection ensures reliability in sensitive portable environments.

Applications

• ISDN Terminal Adaptors
• Personal Digital Assistants (PDAs) and Palmtops
• Notebook and Laptop Computers

Procurement Notes

Verify the specific suffix 'CB' against official Renesas or Intersil documentation to confirm package type and temperature range, as suffixes define physical attributes rather than electrical function. Confirm end-of-life status through authorized distributors, as this series may be discontinued. Ensure compliance with export restrictions if applicable to the region.

Selection Notes

Select this component for applications requiring minimal power consumption in battery-operated devices. Verify that the single-driver configuration meets system requirements, as other variants in the family offer different driver counts. Ensure the operating temperature range aligns with the environmental conditions of the target application.

Part Context

This part belongs to the ICL32X7E family of low-power RS-232 transceivers. These devices are engineered as direct replacements for older 5V-only RS-232 chips, offering compatibility with modern 3.3V logic systems. The family emphasizes space savings through small capacitor requirements and reduced footprint packaging options.

Replacement Considerations

Publicly confirmed substitutes include MAX207E, HIN207E, and HIN237E, which serve as 5V lower-power alternatives. Verify pinout compatibility and voltage levels before substitution.