MAX3318CPW

Overview

The MAX3318CPWR is a low-power, full-duplex RS-232 transceiver manufactured by Texas Instruments. It integrates two drivers and two receivers within a single package, supporting data rates up to 460 Kbps. The device operates from a single 2.25V to 3V power supply, drawing only 2mA of operating current. It features IEC 61000-4-2 electrostatic discharge (ESD) protection rated at ±15kV for contact discharge and ±15kV for air gap discharge. The component utilizes a 20-pin Thin Shrink Small Outline Package (TSSOP) with a width of 4.40mm. It includes a shutdown mode to minimize power consumption during periods of inactivity.

Feature Summary

• Integrates dual drivers and dual receivers for complete full-duplex RS-232 communication capabilities.
• Provides robust ESD protection compliant with IEC 61000-4-2 standards without requiring external components.
• Operates efficiently on a single low-voltage supply ranging from 2.25V to 3V.
• Includes a dedicated shutdown pin to significantly reduce power consumption when the device is idle.

Applications

• Portable battery-powered devices such as laptops and PDAs requiring low-power serial communication.
• Industrial control systems utilizing RS-232 interfaces for data transmission.
• Medical equipment requiring reliable serial connectivity with high ESD immunity.
• POS systems and handheld terminals needing compact interface solutions.

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm temperature range and packaging details. The 'C' suffix indicates commercial temperature operation, while other suffixes may denote extended ranges. Ensure compatibility with the intended PCB footprint for the 20-TSSOP package. Confirm RoHS compliance status if required by project specifications. Cross-reference part markings with manufacturer datasheets to avoid counterfeit components.

Selection Notes

Select this component when a low-voltage, single-supply RS-232 solution is required for space-constrained designs. It is suitable for applications demanding high ESD protection levels without additional circuitry. Compare performance metrics against similar transceivers regarding current consumption and data rate limits. Ensure the operating voltage range aligns with the system's power supply architecture. Consider the thermal characteristics if the device will operate in enclosed environments.

Part Context

The MAX3318 belongs to the Maxim Integrated MAX3318 family of RS-232 transceivers, now managed under Texas Instruments following acquisition. This series is designed for portable electronics where power efficiency and small form factors are critical. The CPWR variant specifically denotes the commercial temperature grade housed in a TSSOP package. Other variants in the family may offer different temperature ranges or package options to suit diverse environmental requirements.

Replacement Considerations

The MAX3318EIPWRG4 is listed as a parameter-equivalent alternative. Verify electrical specifications and pinout compatibility before substitution. Check for differences in temperature ratings and packaging dimensions. Ensure that any replacement maintains the required ESD protection levels and data rate capabilities for the application.