MAX3222EIDB

Overview

The MAX3222EIDB is a dual channel RS-232 transceiver manufactured by Texas Instruments, designed for full-duplex data communication. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 500 kb/s. The device integrates two drivers and two receivers in a single package. Key electrical specifications include a maximum power supply voltage of 5.5 V, a minimum of 3 V, and an operating supply current of 1 mA. It provides electrostatic discharge (ESD) protection rated at 15 kV. The component functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Integrates dual independent drivers and receivers for simultaneous full-duplex transmission and reception on RS-232 lines.
• Features integrated charge pump circuitry that eliminates the requirement for external DC-to-DC converters or negative voltage supplies.
• Includes shutdown mode functionality to significantly reduce power consumption during periods of inactivity.
• Provides robust input protection against electrostatic discharge events up to 15 kV according to specified testing standards.

Applications

• Industrial control systems requiring reliable serial communication interfaces.
• Portable battery-powered equipment utilizing low-power RS-232 connectivity.
• Modems and fax machines implementing standard RS-232 signaling protocols.

Procurement Notes

Verify the specific suffix 'DB' corresponds to the SSOP-20 package variant when sourcing replacements. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the design accommodates the required external capacitor count for the internal charge pump operation as defined in the datasheet schematics.

Selection Notes

Select this component for applications requiring dual-channel RS-232 communication with low quiescent current. Compare against the MAX3222EIDWR for SOIC packaging alternatives if pin-out compatibility differs. Evaluate the TRS3222E series for potential pin-compatible upgrades if higher performance metrics are required in future designs.

Part Context

This part belongs to the MAX3222E family of multichannel RS-232 line drivers and receivers. It shares functional similarities with the MAX3223E but offers distinct driver and receiver configurations. The device is widely used in embedded systems where space-constrained PCB layouts necessitate compact surface-mount packages like the SSOP-20 form factor.

Replacement Considerations

MAX3222EIDBR

FAQ

Does the MAX3222EIDB require external negative voltage supplies?

No, the device utilizes an internal charge pump to generate the necessary negative voltage for RS-232 signal levels, requiring only positive capacitors.

What is the maximum data rate supported by this transceiver?

The MAX3222EIDB supports data rates up to 500 kb/s under standard operating conditions.

Is the device suitable for harsh industrial environments?

Yes, it features 15 kV ESD protection and operates within a wide temperature range of -40°C to +85°C.