MAX3221ECPWR

Overview

The MAX3221ECPWR is a single-channel RS-232 line driver and receiver manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device features a data rate of 250 kbps and includes an integrated shutdown mode with low power consumption of 1 µA. It provides ±7 V output swings and offers 15 kV ESD protection on RS-232 inputs and outputs. Packaged in a TSSOP-16 surface-mount format, it functions as a full-duplex transceiver suitable for industrial and commercial applications.

Feature Summary

• Integrates a single driver and receiver for full-duplex RS-232 communication
• Includes shutdown mode for significant power reduction during idle periods
• Provides robust electrostatic discharge protection on all signal pins

Applications

• Portable equipment requiring low-power serial communication
• Industrial control systems with RS-232 interfaces
• Modems and fax machines utilizing standard RS-232 protocols

Procurement Notes

Verify the component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'E' indicates extended temperature performance and 'PWR' denotes the TSSOP-16 reel packaging. Ensure compliance with RoHS directives and check for any recent product change notices that may affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a single channel of RS-232 transmission is required with low standby current. Compare against the MAX3221IPWR if industrial temperature range (-40°C to +85°C) is necessary instead of the commercial range. Ensure the application does not require higher data rates than 250 kbps or additional channels, which would necessitate multi-driver variants like the MAX3222.

Part Context

This part belongs to the MAX3221 family of low-power RS-232 transceivers designed for battery-operated systems. It serves as a drop-in replacement for older CMOS-based RS-232 drivers while offering improved noise immunity and lower power consumption. The device is widely used in embedded systems where space constraints and power efficiency are critical design parameters.

Replacement Considerations

The MAX3221IPWR is a verified alternative with an extended industrial temperature range. The SN75C3221PWR offers similar functionality but lacks the shutdown feature. Verify pin compatibility and electrical specifications before substituting.