MAX3243ECRHBR

Overview

The MAX3243ECRHBR is a low-power RS-232 transceiver manufactured by Texas Instruments, housed in a VQFN-32 surface-mount package. It integrates three drivers and five receivers for full-duplex communication with a data rate of 500 kb/s. The device operates on a single 3 V to 5.5 V supply, drawing only 1 mA of quiescent current. It features a shutdown mode to extend battery life in portable applications. Electrical specifications include a propagation delay of 0.15 µs and ±15 kV ESD protection on all pins. The component supports standard 3.3 V and 5 V logic levels within an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates three independent line drivers and five line receivers for multi-channel serial communication.
• Includes internal charge pumps that generate required RS-232 voltage swings from a single power supply.
• Provides robust electrostatic discharge protection rated at ±15 kV across all signal interfaces.
• Features a dedicated shutdown pin to minimize power consumption during idle periods.

Applications

• Portable equipment requiring extended battery life through low-power operation
• Industrial control systems utilizing RS-232 communication protocols
• Modems and handheld terminals needing multi-channel serial connectivity

Procurement Notes

Verify the specific suffix RHBR confirms the VQFN-32 package and reel packaging format. Confirm the E grade indicates the commercial temperature range of 0°C to +70°C. Ensure compatibility with target PCB footprint dimensions for the VQFN-32 housing. Check moisture sensitivity level requirements for storage and reflow soldering processes.

Selection Notes

Select this component when three transmit and five receive channels are required in a compact form factor. Compare against MAX3243EIDBR if an industrial temperature range (-40°C to +85°C) or SSOP-28 package is preferred. Consider the TRS3243ECRHBR as a potential alternative if pin-to-pin compatibility with similar TI families is needed. Verify that the 500 kb/s speed meets system timing constraints.

Part Context

This part belongs to the MAX3243E family of multichannel RS-232 line drivers and receivers. It shares functional similarities with the MAX3243EIDBR but differs in package type and temperature rating. The series is designed for applications requiring multiple serial ports in space-constrained environments.

Replacement Considerations

MAX3243EIDBR offers identical electrical performance in an SSOP-28 package with an extended industrial temperature range. TRS3243ECRHBR serves as a compatible alternative within the Texas Instruments portfolio.