MAX3221IDB

Overview

The MAX3221IDB 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 provides full-duplex communication with a data rate capability of 250 kbps. It features low power consumption, drawing only 1 mA during active operation and entering shutdown mode for reduced current draw. The component is housed in a 16-pin SSOP package and is rated for an operating temperature range from -40°C to +85°C. It includes integrated charge pumps to generate the necessary voltages for RS-232 signaling without external components.

Feature Summary

• Single-channel transceiver design simplifies circuit layout for point-to-point serial communications
• Integrated charge pump eliminates the need for external capacitors in standard configurations
• Shutdown mode significantly reduces power consumption for battery-operated applications
• High ESD protection ratings ensure robustness against electrostatic discharge events

Applications

• Industrial control systems requiring reliable serial communication interfaces
• Portable instrumentation and handheld devices utilizing battery power
• Modem and telecommunications equipment interfacing
• Personal computers and peripheral connections

Procurement Notes

Verify the specific suffix 'IDB' confirms the industrial temperature grade and SSOP-16 packaging. Confirm RoHS compliance status as per the latest manufacturer documentation. Check for end-of-life notices or obsolescence warnings before finalizing procurement plans. Ensure the ordering quantity matches the tube packaging specifications provided by the distributor.

Selection Notes

Select this component when a single driver and receiver pair is sufficient for the application. Compare against the MAX3221IDBR if surface-mount reel packaging is preferred over tubes. Consider the MAX3243 series if multiple drivers or receivers are required. Verify that the 250 kbps speed meets the system timing requirements. Ensure the 3 V to 5.5 V supply range aligns with the target board voltage.

Part Context

This part belongs to the MAX3221 family of RS-232 transceivers designed for low-power applications. It serves as a direct replacement for older MC145572-based designs but offers improved performance and lower power usage. The IDB variant specifically denotes the industrial temperature range and plastic small-outline package. It is widely used in legacy system upgrades and new embedded designs requiring standard RS-232 connectivity.

Replacement Considerations

The MAX3221IDBR is the tape-and-reel equivalent of the MAX3221IDB. Other single-channel alternatives include the MAX3232 series, though pinouts may differ. Verify compatibility with existing PCB footprints when substituting. Check datasheets for differences in capacitor requirements and ESD protection levels.