MAX3243CDWRG4

Overview

The MAX3243CDWRG4 is a low-power RS-232 transceiver manufactured by Texas Instruments, housed in a 28-pin SOIC package. It integrates three drivers and five receivers for full-duplex communication with data rates up to 250 kbps. The device operates on a single 3 V to 5.5 V supply and features a shutdown mode that reduces current consumption to less than 1 µA. It includes ESD protection rated at 15 kV according to the Human Body Model and meets EIA/TIA-232-F standards. The component supports operation across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates three independent drivers and five independent receivers within a single IC.
• Features a dedicated shutdown pin to minimize power consumption during idle periods.
• Provides robust electrostatic discharge protection on all RS-232 signal lines.

Applications

• Industrial control systems requiring reliable serial communication.
• Portable instrumentation and battery-powered devices utilizing low-power interfaces.
• Modem and communications equipment interfacing.

Procurement Notes

Verify the specific suffix G4 indicates lead-free compliance and RoHS adherence when sourcing. Confirm the CDWR variant matches the required commercial-to-industrial temperature range and SOIC-28 footprint for your PCB layout. Ensure compatibility with existing 3V or 5V logic levels before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring multiple transmit and receive channels without external charge pumps. Compare against the MAX3243EIDWRG4 if extended industrial temperature ranges are necessary. Evaluate the TRS3243 series if alternative packaging options like SSOP are preferred for space-constrained designs.

Part Context

This part belongs to the MAX3243 family of multichannel RS-232 line drivers and receivers. It shares functional similarities with the MAX3243CDWR but includes the G4 suffix denoting green/RoHS-compliant manufacturing processes. The device is part of Texas Instruments' broader portfolio of interface solutions designed for serial data transmission.

Replacement Considerations

The MAX3243CDWR serves as the direct non-RoHS equivalent. For pin-compatible alternatives, consider the MAX3243EIDWRG4 for wider temperature tolerance or the TRS3243IPWRG4 for SSOP packaging options.

FAQ

Does the MAX3243CDWRG4 require external capacitors?

Yes, the device requires four external 0.1 µF capacitors to support the internal charge pump circuitry for generating the required RS-232 voltage levels.

What is the maximum data rate supported?

The datasheet specifies a maximum data rate of 250 kbps for reliable operation under standard conditions.

How does the shutdown feature function?

Driving the shutdown pin high disables both the drivers and the charge pump, reducing the supply current to less than 1 µA while maintaining receiver functionality.