MAX3243CPWRE4

Overview

The MAX3243CPWRE4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device integrates three drivers and five receivers for full-duplex communication with a data rate capability of 250 kb/s. It features a shutdown mode that reduces operating supply current to approximately 1 µA. The component includes ±15 kV electrostatic discharge (ESD) protection on the bus lines according to Human Body Model standards. It is housed in a 28-pin TSSOP package and functions reliably across an industrial temperature range from 0°C to +70°C.

Feature Summary

• Integrated ESD protection rated at ±15 kV on all RS-232 bus lines to safeguard against electrostatic discharge events.
• Shutdown functionality significantly lowers power consumption by reducing supply current to typical levels of 1 µA.
• Multichannel architecture provides three independent drivers and five receivers for complex serial communication interfaces.

Applications

• Industrial control systems requiring robust RS-232 connectivity
• Portable instrumentation and battery-powered devices utilizing low-power modes
• Data acquisition systems interfacing with modems or barcode scanners

Procurement Notes

Verify the specific suffix RE4 indicates reel packaging when sourcing components. Confirm the CP designation aligns with the required commercial temperature range of 0°C to +70°C for your application environment. Ensure compatibility with standard 28-pin TSSOP footprints during PCB layout verification. Cross-reference manufacturer documentation for any recent product change notices affecting pinout or electrical characteristics.

Selection Notes

Select this component when a balance of moderate data rates and high ESD immunity is required for RS-232 links. The 250 kb/s speed suits most standard asynchronous communication needs without the complexity of higher-speed transceivers. Consider the TSSOP package for space-constrained surface-mount designs. Evaluate the 3 V to 5.5 V operating range to ensure compatibility with existing system power rails.

Part Context

This part belongs to the MAX3243 family of multichannel RS-232 transceivers designed for applications needing multiple serial ports. Unlike single-channel variants, it consolidates three drivers and five receivers into one integrated circuit. The CP variant specifically targets commercial temperature environments, distinguishing it from extended temperature options like the EI series. It serves as a compact solution for systems requiring multiple serial connections.

Replacement Considerations

MAX3243CPWR is a compatible alternative differing primarily in tube versus reel packaging configuration. MAX3243CDBR offers the same electrical specifications in an SSOP-28 package, requiring footprint adaptation. Verify pin-to-pin compatibility before substituting these parts in existing designs.