MAX3243IDWR

Overview

The MAX3243IDWR is a low-power RS-232 transceiver manufactured by Texas Instruments, designed for multi-channel communication applications. It integrates three drivers and five receivers within a single SOIC-28 package, supporting full-duplex data transmission at rates up to 250 kb/s. 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 features shutdown functionality to minimize power consumption during idle periods. The component includes integrated charge pumps that eliminate the need for external capacitors in some configurations, although standard designs typically utilize small external capacitors. It provides robust ESD protection rated at 15 kV according to IEC 61000-4-2 standards.

Feature Summary

• Integrates three independent line drivers and five line receivers for versatile multi-port connectivity
• Features low standby current with dedicated shutdown mode to extend battery life in portable devices
• Provides high electrostatic discharge (ESD) immunity meeting stringent industrial protection standards
• Operates reliably across extended commercial temperature ranges with stable voltage regulation

Applications

• Industrial control systems requiring multiple serial communication ports
• Portable instrumentation and medical equipment needing low-power interface solutions
• Modem and fax machine implementations utilizing standard RS-232 signaling
• Data acquisition systems connecting microcontrollers to peripheral devices

Procurement Notes

Verify the specific suffix IDWR corresponds to the SOIC-28 surface-mount package and industrial temperature grade (-40°C to +85°C). Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to ordering. Ensure compatibility with existing PCB footprints and verify that the required external capacitor values match the design specifications for optimal performance.

Selection Notes

Select this component when designing circuits requiring three transmit and five receive channels within a compact footprint. Compare against the MAX3243E series if higher data rates up to 500 kb/s are necessary for the application. Consider the MAX3243MPWREP variant for military-grade temperature ranges extending to -55°C. Evaluate pinout compatibility with legacy designs using similar TI RS-232 transceivers to facilitate board upgrades.

Part Context

This part belongs to the MAX3243 family of multi-channel RS-232 transceivers from Texas Instruments. The family offers various packaging options including SSOP, TSSOP, and VQFN, catering to different space constraints. The IDWR designation specifically identifies the industrial temperature range version in a wide SOIC package, distinguishing it from commercial variants and smaller form-factor alternatives within the same functional group.

Replacement Considerations

MAX3243IDW serves as the tube-pack equivalent of the same electrical specification. MAX3243EIDWR provides identical pinout and functionality but supports higher data rates up to 500 kb/s. MAX3243CDBR is a commercial grade alternative in SSOP-28 packaging with a narrower temperature range.