MAX3243CDBG4

Overview

The MAX3243CDBG4 is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V supply and features three drivers and five receivers for full-duplex communication. The device supports data rates up to 250 kb/s and includes a shutdown mode that reduces supply current to less than 1 µA. It provides ±15-kV electrostatic discharge (ESD) protection on the bus lines per human body model standards. The component is housed in a 28-pin TSSOP package and is rated for operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Multichannel architecture with three independent drivers and five receivers
• Integrated ±15-kV ESD protection on all RS-232 bus lines
• Low-power shutdown mode for significant current reduction
• Single-supply operation compatible with 3.3-V and 5-V systems

Applications

• Industrial control systems requiring robust serial communication
• Portable instrumentation and battery-powered devices
• Modem and communications equipment interfaces
• Point-of-sale terminals and barcode scanners

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS adherence when sourcing. Confirm the package type matches the design requirements, as variations exist within the family. Check for active status or obsolescence notices directly from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when multiple RS-232 channels are needed in a compact footprint. Ensure the system voltage falls within the 3-V to 5.5-V operating range. Consider the thermal performance of the TSSOP package if high ambient temperatures are expected in the application environment.

Part Context

This part belongs to the MAX3243 family of multichannel RS-232 transceivers. It shares functional similarities with other members like the MAX3243IDB and MAX3243CPW but differs in package style and industrial temperature rating. The 'G4' suffix typically denotes environmental compliance enhancements compared to earlier revisions.

Replacement Considerations

Direct pin-compatible alternatives include the MAX3243IDB and MAX3243IDWR for similar industrial specifications. Verify electrical parameters such as data rate and ESD protection levels match the original design requirements before substitution.