MAX3221EIDBG4

Overview

The MAX3221EIDBG4 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 supply and includes internal charge pumps to generate the voltages required for RS-232 communication. The device features ±15-kV electrostatic discharge (ESD) protection on all RS-232 lines, ensuring robust performance in harsh environments. It supports data rates up to 250 kbps and draws only 1 mA of supply current in active mode. The component is housed in a 16-pin SSOP package and is rated for operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump eliminates the need for external voltage sources
• High ESD protection rating on all signal lines
• Low power consumption with microamp-level standby current
• Single-supply operation compatible with 3.3 V and 5 V systems

Applications

• Industrial control systems requiring reliable serial communication
• Portable battery-powered devices due to low power usage
• Modems and fax machines utilizing RS-232 interfaces
• Point-of-sale terminals and medical equipment

Procurement Notes

Verify the specific suffix IDBG4 corresponds to the 16-pin SSOP package variant when sourcing. Confirm RoHS compliance status as manufacturing processes evolve. Check for obsolescence notices or last-time buy notifications from Texas Instruments distributors. Ensure the supplier provides valid traceability documentation for industrial applications.

Selection Notes

Select this component when a single full-duplex RS-232 channel is required with high ESD immunity. Compare against the MAX3221IDBR if a different package style is preferred. Consider the MAX3222 or MAX3223 if additional transmitter/receiver channels are needed. Verify that the 250 kbps data rate meets the system timing requirements.

Part Context

This part belongs to the MAX3221 family of true 3-V to 5.5-V RS-232 transceivers. The 'E' designation typically indicates an extended industrial temperature range. The 'G4' suffix often denotes lead-free and RoHS-compliant packaging variations within the Texas Instruments portfolio. It serves as a direct replacement for older Maxim Integrated versions of the same functional design.

Replacement Considerations

MAX3221IDBR is a pin-compatible alternative in a different package. MAX3221IPWR offers the same functionality in a TSSOP package. SN75C3221 is a comparable TI part with similar electrical characteristics.