MAX3318EIDB

Overview

The MAX3318EIDB is a dual-driver, dual-receiver RS-232 transceiver manufactured by Texas Instruments. It operates from a single 2.25-V to 3-V supply and supports data rates up to 460 kbps. The device integrates a charge pump requiring only four 0.1-μF capacitors. It features ±15-kV ESD protection on RS-232 I/O pins using the IEC 61000-4-2 Air-Gap Discharge method, ±8-kV Contact Discharge protection, and ±15-kV Human-Body Model protection. Supply current is 300 μA during operation and reduces to 1 μA in low-power standby mode with receivers active. The component is housed in a 20-pin SSOP package.

Feature Summary

• Integrated auto-power-down plus feature reduces supply current to 1 μA when drivers are inactive for approximately 30 seconds.
• Robust electrostatic discharge (ESD) protection rated at ±15 kV air-gap, ±8 kV contact discharge, and ±15 kV human-body model.
• Proprietary low-dropout driver output stage enables RS-232-compatible operation from a 2.25-V to 3-V supply.
• Flexible power management control via FORCEON and FORCEOFF inputs to override or enable auto-power-down modes.

Applications

• Battery-powered systems
• PDAs
• Cellular phones
• Notebooks
• Hand-held equipment

Procurement Notes

Verify the specific ordering suffix 'DB' corresponds to the 20-pin SSOP tube packaging configuration. Confirm the temperature grade 'E' indicates the industrial range of -40°C to +85°C. Ensure compatibility with the required board assembly process for SSOP packages. Check for any RoHS compliance documentation associated with the NIPDAU lead finish.

Selection Notes

Select this component for applications requiring low-voltage RS-232 communication with minimal external capacitance. The integrated ESD protection eliminates the need for external protection devices. Consider the 20-pin SSOP footprint constraints and thermal dissipation requirements. Verify that the system logic levels align with the CMOS inputs and outputs of the transceiver.

Part Context

The MAX3318EIDB belongs to the MAX3318 family of low-voltage RS-232 transceivers. It shares functional characteristics with other variants such as MAX3318EIPWR and MAX3318EIDBR, differing primarily in package type and shipping quantity. The 'IDB' designation specifically identifies the industrial temperature range version in a 20-pin SSOP tube.

Replacement Considerations

MAX3318EIDBR serves as a reel-based alternative within the same package and electrical specification. MAX3318EIPWR offers equivalent functionality in a TSSOP-20 package. Verify pin-to-pin compatibility and thermal performance before substituting.