ICL3243ECAZ-T7A

Overview

The ICL3243ECAZ-T7A is a full-duplex RS-232 transceiver manufactured by Renesas Electronics Corporation. It integrates three drivers and five receivers within a single package, supporting data rates up to 250 kbps. The device operates on a single power supply ranging from 3 V to 5.5 V. It utilizes external charge pumps to generate the necessary voltages for RS-232 signal levels. The component is housed in a 28-pin SSOP (Shrink Small Outline Package) with a width of 5.30 mm. It is designed for industrial temperature ranges, functioning between -40°C and +85°C. The part includes automatic power-down mode to minimize current consumption during idle periods.

Feature Summary

• Integrates three independent drivers and five independent receivers for comprehensive RS-232 communication capabilities.
• Features automatic power-down mode that reduces supply current to less than 30 µA when inputs are unconnected or grounded.
• Includes ESD protection circuits rated at ±15 kV on driver outputs and ±15 kV on receiver inputs according to the Human Body Model.
• Operates reliably with a single 3 V to 5.5 V power supply using internal charge pump circuitry.

Applications

• Industrial control systems requiring robust serial communication interfaces.
• Portable battery-powered equipment utilizing low-power RS-232 links.
• Modems and fax machines needing full-duplex data transmission.
• Point-of-sale terminals and medical instruments with serial connectivity requirements.

Procurement Notes

Verify the specific suffix 'T7A' indicates tape-and-reel packaging rather than tube packaging. Confirm the 'E' designation aligns with the extended industrial temperature range of -40°C to +85°C. Ensure compatibility with existing PCB footprints for the 28-SSOP package. Check for RoHS compliance status as per current manufacturer declarations. Validate lead times directly with authorized distributors as availability fluctuates.

Selection Notes

Select this component when designing systems requiring multiple transmit and receive channels in a compact form factor. The 28-SSOP package offers space efficiency compared to larger DIP options. Consider the 250 kbps speed limit for applications not requiring high-speed data transfer. Evaluate the need for automatic power-down features to extend battery life in portable devices. Ensure the system voltage falls within the 3 V to 5.5 V operating range.

Part Context

This part belongs to the ICL3243 family of RS-232 transceivers from Renesas. It shares functional similarities with other members like the ICL3243CBZ but differs in package type and temperature rating. The 'ECAZ' suffix typically denotes the SSOP package and industrial grade. It serves as a drop-in replacement for older Intersil versions with compatible pinouts.

Replacement Considerations

The MAX3243EIDW from Texas Instruments is a documented alternative offering similar functionality in a DW package. Verify pin-to-pin compatibility before substitution. Check if the replacement supports the required 28-SSOP footprint or requires adapter solutions. Confirm that the substitute meets the same ESD and temperature specifications.