ICL3245CA

Overview

The Intersil ICL3245CA is a single-supply RS-232 transceiver designed for +3V to +5.5V operation, featuring three drivers and five receivers in a full-duplex configuration. It supports data rates up to 1 Mbps while maintaining a typical operating supply current of 1 mA. The device incorporates enhanced automatic powerdown circuitry that reduces power consumption during idle periods by disabling the charge pumps. It utilizes small external 0.1 µF capacitors for the internal charge pump voltage generation. The component provides ±7.5 V output swings and includes ESD protection on all lines.

Feature Summary

• Enhanced automatic powerdown functionality minimizes power consumption when the transmitter inputs are in an inactive state.
• Single-supply architecture operates directly from +3V to +5.5V sources without requiring negative voltages.
• Integrated charge pump generates required internal voltages using minimal external 0.1 µF capacitors.
• Full-duplex communication capability with three independent drivers and five independent receivers.

Applications

• Portable battery-powered equipment requiring low standby current
• Industrial control systems utilizing RS-232 serial communication
• Modem interfaces in compact electronic devices

Procurement Notes

Verify the specific suffix designation against official Renesas or Intersil documentation to confirm temperature range and package type. The CA suffix typically indicates a commercial temperature range (0°C to +70°C), whereas other suffixes may denote extended industrial ranges. Ensure the ordering information matches the exact pinout and electrical specifications required for the target design.

Selection Notes

Select this component when a full-duplex RS-232 interface with multiple transmit and receive channels is required within a single package. It is suitable for designs prioritizing low power consumption through automatic powerdown features. Compare driver and receiver counts against system requirements to ensure the three-driver and five-receiver configuration aligns with the application's connectivity needs.

Part Context

The ICL3245CA belongs to the ICL32XXE family of RS-232 transceivers manufactured by Intersil, now part of Renesas Electronics. This series is characterized by its compatibility with standard RS-232 protocols and its ability to operate from a single positive supply voltage. The device represents a solution for integrating serial communication interfaces into space-constrained, battery-operated systems.

Replacement Considerations

The ICL3245EIAZ serves as a functional equivalent with an extended industrial temperature range (-40°C to +85°C). Verify pin compatibility and electrical parameter alignment before substitution. Other members of the ICL3245 family may offer different driver/receiver configurations or packaging options.