ICL3238EIA-T

Overview

The ICL3238EIA-T is a low-power RS-232 transceiver manufactured by Intersil, operating within a supply voltage range of 3 V to 5.5 V. It integrates five drivers and three receivers in a full-duplex configuration, supporting data rates up to 250 kb/s. The device features an automatic powerdown mode that reduces standby current to approximately 1 µA when no valid signal is present on the receiver inputs. It includes enhanced ESD protection rated at 15 kV for both human body model and IEC61000-4-2 air gap discharge. Packaged in a 28-pin SSOP, it meets EIA/TIA-232 specifications.

Feature Summary

• Integrates five drivers and three receivers for comprehensive serial communication interfaces
• Features automatic powerdown circuitry to minimize standby power consumption
• Provides robust 15 kV electrostatic discharge protection on all RS-232 pins
• Operates reliably with single-supply voltages from 3 V to 5.5 V

Applications

• Portable computers and notebook systems requiring low standby power
• Personal digital assistants (PDAs) and handheld devices
• Industrial control terminals and ISDN terminal adaptors
• Peripheral equipment connecting via serial interfaces

Procurement Notes

Verify the suffix 'T' indicates tape-and-reel packaging rather than tube. Confirm the 'I' designation corresponds to the industrial temperature range of -40°C to +85°C. Ensure the component matches the specific pinout and electrical characteristics defined in the official Intersil datasheet before integration into production designs.

Selection Notes

Select this component when designing systems requiring multiple transmit lines alongside fewer receive lines. It serves as a direct replacement for legacy 5V-only RS-232 transceivers in mixed-voltage environments. Consider its small footprint and external capacitor requirements during layout planning to ensure compliance with EMI standards and signal integrity requirements.

Part Context

This part belongs to the ICL32XXE family of low-power RS-232 transceivers designed for battery-operated applications. It shares architectural similarities with the ICL3237E but differs in driver/receiver counts. The series emphasizes reduced power consumption through efficient charge pumps and automatic shutdown features, targeting mobile and portable electronics markets.

Replacement Considerations

Direct substitutes include the ICL3237EIAZ for similar functionality with identical pinouts. Alternative options may involve checking compatibility with MAX232 derivatives if voltage levels and interface protocols align with system requirements.