MAX3243EIRHBRG4

Overview

The MAX3243EIRHBRG4 is a low-power RS-232 transceiver manufactured by Texas Instruments, designed for full-duplex communication. It integrates three drivers and five receivers within a single VQFN-32 package. The device operates on a single power supply ranging from 3 V to 5.5 V, with a typical operating current of 1 mA. It supports data rates up to 500 kb/s and includes an active-low shutdown mode to minimize power consumption during idle periods. The component provides robust ESD protection rated at 15 kV according to IEC 61000-4-2 standards. It functions reliably across an extended industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates three independent line drivers and five line receivers in a compact surface-mount package.
• Features an active-low shutdown control pin that reduces supply current to less than 1 µA.
• Provides high electrostatic discharge immunity meeting IEC 61000-4-2 Level 4 contact and air discharge specifications.

Applications

• Industrial serial communication systems requiring multi-drop capability
• Portable battery-powered equipment utilizing RS-232 interfaces
• Embedded control networks with multiple serial peripherals

Procurement Notes

Verify the complete part number including the G4 suffix to confirm lead-free compliance and RoHS status. Confirm the VQFN-32 package variant matches the design footprint requirements. Ensure the industrial temperature grade (-40°C to +85°C) aligns with the operational environment specifications before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring three transmit and five receive channels on a single RS-232 bus. It is suitable for applications needing low standby power through the shutdown feature. Compare against the commercial grade MAX3243EIRHBR if the operating temperature range of 0°C to +70°C suffices for the specific application constraints.

Part Context

This part belongs to the MAX3243E family of multichannel RS-232 transceivers. It shares functional similarities with other members like the MAX3243EIDWRG4 but differs in package type and thermal performance. The G4 suffix indicates a lead-free and RoHS-compliant manufacturing process, distinguishing it from older non-G4 variants while maintaining electrical compatibility.

Replacement Considerations

The MAX3243EIRHBR serves as a direct functional substitute with identical electrical characteristics but a commercial temperature range (0°C to +70°C). Verify that the lower temperature limit meets the system requirements before substituting the industrial-grade MAX3243EIRHBRG4.