ICL3244ECB

Overview

The ICL3244ECB is a low-power RS-232 transceiver manufactured by Intersil, operating within a supply voltage range of 3.0V to 5.5V. It integrates three drivers and five receivers, supporting full-duplex communication at data rates up to 250kb/s. The device features enhanced automatic powerdown functionality, reducing standby current to approximately 1µA. It provides ±15kV ESD protection on RS-232 pins and operates reliably across an industrial temperature range from -40°C to +85°C. Packaged in SSOP-28, it meets EIA/TIA-232 specifications.

Feature Summary

• Integrated charge pumps enable operation from a single 3V to 5.5V supply without external components
• Automatic powerdown circuit reduces standby current to 1µA when idle
• Robust ±15kV ESD protection on all RS-232 I/O pins
• Compliant with EIA/TIA-232 and V.28/V.24 standards

Applications

• Portable computers and notebook systems requiring low standby power
• Industrial control equipment with RS-232 connectivity
• Battery-powered handheld devices and PDAs
• Peripherals connecting to serial ports in space-constrained designs

Procurement Notes

Verify the specific suffix against manufacturer documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprint for SSOP-28 packages. Check for moisture sensitivity level requirements during assembly. Confirm RoHS compliance status if required by project specifications. Validate that the supplier provides genuine Intersil or Renesas products.

Selection Notes

Select this component when three transmit and five receive channels are required in a compact form factor. Consider its 250kb/s speed limit for applications not demanding higher baud rates. Evaluate the SSOP-28 package constraints against available board space. Compare power consumption metrics against alternatives if battery life is critical. Verify thermal performance within the specified -40°C to +85°C range.

Part Context

This part belongs to the ICL32XXE family of low-power RS-232 transceivers designed for 3V to 5.5V operation. It shares architectural similarities with other members like the ICL3243 and ICL3245 but differs in driver/receiver counts. The 'E' designation typically indicates extended temperature ranges and enhanced ESD protection compared to standard commercial variants.

Replacement Considerations

Direct substitutes include ICL3244EIAZ and ICL3244ECPZ, differing primarily in package style (SSOP vs. PDIP). Cross-reference pinouts carefully when replacing with non-Intersil equivalents such as MAX3244 or SP3244 to ensure functional compatibility.