ICL3244EIR

Overview

The ICL3244EIR is a low-power RS-232 transceiver manufactured by Intersil, designed for operation with supply voltages ranging from 3 V to 5.5 V. It integrates three drivers and five receivers, supporting full-duplex communication at data rates up to 250 kb/s. The device features an automatic powerdown mode that reduces standby current to approximately 1 mA during idle periods. It includes on-chip charge pumps requiring only external 0.1 µF capacitors. The component provides ±15 kV electrostatic discharge (ESD) protection on the RS-232 lines and operates within a temperature range of -40 °C to +85 °C. It is housed in a 28-pin SSOP package.

Feature Summary

• Integrates three independent drivers and five independent receivers for versatile RS-232 connectivity.
• Features automatic powerdown circuitry to minimize standby power consumption when no signal activity is detected.
• Provides robust ±15 kV ESD protection on all RS-232 input and output pins.

Applications

• Portable computers and notebook systems requiring low standby current.
• Industrial control systems utilizing RS-232 communication protocols.
• Modems and peripheral interfaces in battery-operated devices.

Procurement Notes

Verify the specific suffix 'EIR' against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and industrial temperature grade. Ensure compatibility with existing PCB footprints for the 28-pin SSOP package. Confirm RoHS compliance status through the supplier's documentation prior to procurement.

Selection Notes

Select this component when designing systems requiring multiple receiver inputs alongside standard driver outputs. It is suitable for applications needing reduced power consumption in standby modes without sacrificing data throughput up to 250 kb/s. Consider the 28-pin SSOP footprint constraints and the requirement for small external capacitors for the charge pump circuits.

Part Context

This part belongs to the ICL32XXE family of low-power RS-232 transceivers. It shares architectural similarities with other members like the ICL3241 and ICL3243 but offers a specific combination of three drivers and five receivers. The 'E' designation typically indicates industrial temperature range performance, while 'IR' denotes the reel packaging format.

Replacement Considerations

Direct replacements include the ICL3244EIAZ for lead-free SSOP variants or the MAX3244E from Maxim Integrated for pin-compatible alternatives. Verify voltage levels and capacitor requirements when substituting with generic RS-232 transceivers to ensure functional equivalence.