MAX3243CPW

Overview

The MAX3243CPW is a low-power RS-232 transceiver manufactured by Texas Instruments, housed in a 28-pin TSSOP package. It integrates three drivers and five receivers for full-duplex communication with a data rate of 250 kb/s. The device operates on a single 3 V to 5.5 V supply and draws only 1 mA of quiescent current. It features a shutdown mode that reduces power consumption to less than 1 µA. The IC provides ±15 kV ESD protection on RS-232 inputs and outputs, ensuring robust signal integrity in industrial environments.

Feature Summary

• Integrates three independent drivers and five independent receivers within a single compact package.
• Includes a dedicated shutdown pin to minimize power consumption during idle periods.
• Provides high electrostatic discharge immunity rated at ±15 kV on all RS-232 lines.

Applications

• Industrial control systems requiring reliable serial communication.
• Portable battery-powered equipment utilizing RS-232 interfaces.
• Modems and fax machines needing multi-channel line driving capabilities.

Procurement Notes

Verify the specific suffix 'CPW' corresponds to the commercial temperature range and TSSOP-28 package configuration. Confirm RoHS compliance status through official documentation as manufacturing processes may evolve. Check for end-of-life notices or obsolescence warnings from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when a combination of three transmit and five receive channels is required in a surface-mount format. Ensure the application environment remains within the 0°C to +70°C operating temperature range. Consider alternative packages like SOIC or SSOP if board space constraints differ from the TSSOP footprint requirements.

Part Context

This part belongs to the MAX3243 family of multi-channel RS-232 transceivers. It shares functional similarities with other variants such as the MAX3243IDW and MAX3243MPWREP but differs in temperature rating and packaging. The CPW designation specifically indicates the commercial grade performance level and plastic leaded frame construction.

Replacement Considerations

Direct substitutes include MAX3243IDWR and MAX3243CDBR for similar functionality. Verify pin compatibility and thermal specifications when replacing with industrial grade variants like MAX3243IDW.

FAQ

What is the maximum data transmission speed supported?

The MAX3243CPW supports data rates up to 250 kb/s.

How does the shutdown feature affect power consumption?

Activating the shutdown pin reduces the supply current to less than 1 µA, significantly lowering power usage.

Is the device compatible with 3.3 V logic levels?

Yes, the device operates effectively with supply voltages ranging from 3 V to 5.5 V.