MAX3221CPW

Overview

The MAX3221CPW is a single-channel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V power supply and supports data rates up to 250 kbps. The device features ±15-kV electrostatic discharge (ESD) protection on the RS-232 lines, ensuring robust performance in harsh environments. It utilizes small external flying capacitors for charge pump functionality, eliminating the need for bulky electrolytic components. The component is housed in a 16-pin TSSOP package with an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump requires only small external capacitors
• Provides ±15-kV ESD protection on transceiver lines
• Operates efficiently from a single low-voltage supply
• Includes AutoShutdown feature for reduced current consumption

Applications

• Point-to-point serial communication links
• Modem interfaces
• Portable battery-powered instruments
• Handheld terminals and PDAs

Procurement Notes

Verify the specific suffix 'CPW' corresponds to the commercial temperature grade and TSSOP-16 packaging configuration. Confirm RoHS compliance status and lead-free finish details against the latest manufacturer datasheet revision. Ensure ordering quantities align with standard tube or reel configurations provided by authorized distributors.

Selection Notes

Select this component when a single full-duplex RS-232 channel is required within space-constrained designs. It is suitable for applications needing high ESD immunity without external protection circuits. Consider alternative pinouts if multiple channels are necessary, as this part provides only one transmitter and one receiver.

Part Context

This part belongs to the MAX3221 family of true 3-V to 5.5-V RS-232 transceivers. It shares functional similarities with other Maxim Integrated and Texas Instruments parts in the same series, differing primarily in package type and temperature rating. The CPW designation specifically indicates the plastic thin-shrink small-outline package variant.

Replacement Considerations

• MAX3221IPWR
• MAX3221IDBR

FAQ

What is the maximum data rate supported by the MAX3221CPW?

The device supports data transmission rates up to 250 kbps.

Does the MAX3221CPW require large electrolytic capacitors?

No, it uses small external flying capacitors typically ranging from 0.1 µF to 1 µF for the charge pump circuit.

What is the ESD protection level of the RS-232 lines?

The transceiver lines offer ±15-kV ESD protection according to the IEC 1000-4-2 standard.