ICL3207IB

Overview

The ICL3207IB is a low-power RS-232 transceiver manufactured by Intersil, now part of Renesas Electronics. It integrates five drivers and three receivers within a single package, supporting full-duplex communication at data rates up to 250 kb/s. The device operates on a supply voltage range of 3 V to 5.5 V, making it suitable for both 3.3 V and 5 V systems. It features an automatic powerdown function that reduces standby current to approximately 1 µA when the bus is idle. The component includes integrated charge pumps requiring only small external capacitors and provides ±15 kV ESD protection on RS-232 pins.

Feature Summary

• Integrates five independent drivers and three receivers for comprehensive serial communication interfaces.
• Features an automatic powerdown circuit that significantly reduces standby power consumption during inactivity.
• Provides robust electrostatic discharge protection rated at ±15 kV on all RS-232 input and output pins.
• Utilizes efficient on-chip charge pumps that minimize the need for large external boosting capacitors.

Applications

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

Procurement Notes

Verify the specific suffix designation carefully, as the ICL3207 family utilizes distinct letters to denote temperature ranges and packaging types. Confirm whether the required unit is lead-free or contains lead, as this affects RoHS compliance status. Check for end-of-life notifications from the manufacturer, as older Intersil components may have limited availability through primary channels.

Selection Notes

Select this component when designing systems requiring multiple transmit lines alongside fewer receive lines. Ensure the application environment supports the specified operating temperature range. Verify that the available board space accommodates the necessary external capacitors for the charge pump circuits. Consider the automatic powerdown feature if battery life is a critical constraint in portable designs.

Part Context

The ICL3207 belongs to the Intersil ICL32X7E series of low-power RS-232 transceivers. This family was designed to replace earlier 5 V-only devices with versions compatible with modern 3 V logic levels. The IB suffix typically indicates a specific industrial temperature grade and SOIC-24 packaging configuration within the broader product line.

Replacement Considerations

Publicly confirmed direct substitutes include the HIN207E and MAX207E. These components share similar pinouts and functional specifications within the RS-232 interface category.