ICL3244IA

Overview

The Intersil ICL3244IA is a full-duplex RS-232 transceiver designed for operation with a single power supply ranging from +3V to +5.5V. It integrates three drivers and five receivers, supporting data rates up to 250kbps while meeting EIA/TIA-232 and V.28/V.24 specifications even at the minimum voltage of 3.0V. The device features enhanced automatic powerdown functionality to minimize current consumption during idle periods. It operates within an extended temperature range of -40°C to +85°C and includes receiver hysteresis of 500mV for noise immunity.

Feature Summary

• Supports full-duplex communication with three independent drivers and five receivers
• Integrates enhanced automatic powerdown circuitry to reduce quiescent current
• Maintains compliance with EIA/TIA-232 standards at low supply voltages down to 3.0V
• Provides improved noise rejection through integrated receiver hysteresis

Applications

• Industrial control systems requiring reliable serial communication
• Portable battery-powered equipment utilizing low-voltage logic
• Modem interfaces adhering to standard RS-232 protocols
• Embedded systems operating in environments with moderate electrical noise

Procurement Notes

Verify the manufacturer source carefully, as Intersil operations were acquired by Renesas Electronics. Confirm the package type matches SSOP-28 requirements for your PCB layout. Ensure the specific suffix indicates the correct tape-and-reel or tube packaging if applicable. Check RoHS compliance status against current regulatory requirements for your region. Validate that the component meets the specified temperature grade for your intended operational environment.

Selection Notes

Select this component when a full-duplex interface with multiple receive lines is necessary. It is suitable for applications requiring operation below 5V without external charge pumps. Consider the 250kbps speed limit for high-speed data transmission needs. Evaluate the powerdown feature benefits for battery-constrained designs. Ensure the driver count aligns with the specific signal routing requirements of the system architecture.

Part Context

This device belongs to the ICL32XX family of RS-232 transceivers known for low-power operation. It shares architectural similarities with other Intersil parts like the ICL3224 but offers increased receiver capacity. The family is characterized by internal charge pump technology eliminating external capacitors. This specific model provides a balance between driver/receiver count and power efficiency.

FAQ

Does the ICL3244IA require external capacitors for its charge pump?

Yes, the device utilizes internal charge pump circuitry that typically requires external flying capacitors and boost capacitors to generate the necessary voltages for RS-232 signaling levels.

What is the maximum data rate supported by this transceiver?

The ICL3244IA supports a maximum data rate of 250kbps under normal operating conditions.