ICL3217CB

Overview

The Intersil ICL3217CB is a low-power RS-232 transceiver designed for operation with supply voltages ranging from 3.0 V to 5.5 V. It integrates one driver and three receivers, supporting data rates up to 250 kbps while meeting EIA/TIA-232 and V.28/V.24 specifications at the lower voltage limit. The device features an automatic powerdown function that reduces standby supply current to approximately 1 µA when no valid RS-232 signal is detected on receiver inputs. It includes efficient on-chip charge pumps requiring only small external capacitors and provides ±15 kV electrostatic discharge (ESD) protection on RS-232 I/O pins according to IEC61000-4-2 standards.

Feature Summary

• Automatic powerdown circuitry significantly reduces standby current consumption without hardware modifications.
• Integrated charge pumps enable operation with minimal external capacitance requirements.
• Robust ±15 kV ESD protection on RS-232 interface pins ensures reliability in harsh environments.

Applications

• ISDN Terminal Adaptors
• Personal Digital Assistants (PDAs)
• Notebook and laptop computers

Procurement Notes

Verify the specific suffix 'CB' against official Renesas/Intersil documentation to confirm temperature range and package variations. Confirm RoHS compliance status as availability may vary by manufacturing lot. Check for export restrictions or end-use limitations associated with the component series before procurement.

Selection Notes

Select this component for applications requiring low power consumption in portable devices operating between 3 V and 5.5 V. Ensure the design accommodates the required external capacitors for the internal charge pumps. Verify that the single driver and three receiver configuration meets the system's interface requirements.

Part Context

The ICL3217CB belongs to the ICL32X7E family of RS-232 transceivers manufactured by Intersil, now part of Renesas Electronics. This series is engineered for low-voltage, low-power serial communication interfaces, offering a direct replacement for older 5 V-only RS-232 drivers in modern 3.3 V systems.

Replacement Considerations

Publicly documented equivalents include MAX207E, HIN207E, and HIN237E. These parts serve as 5 V lower power replacements within the same functional category. Verify pin compatibility and electrical specifications before substitution.