MAX3318ECPWR

Overview

The MAX3318ECPWR 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 four 0.1-μF capacitors and provides ±15-kV ESD protection on RS-232 I/O pins per the IEC 61000-4-2 Air-Gap Discharge method. It features an auto-power-down plus mode that reduces supply current to 1 μA when inputs are idle for approximately 30 seconds. The component is housed in a 20-pin TSSOP package with an operating temperature range of 0°C to 70°C.

Feature Summary

• Integrated ±15-kV ESD protection on RS-232 I/O pins compliant with IEC 61000-4-2 standards
• Auto-power-down plus functionality reduces supply current to 1 μA during inactivity
• Proprietary low-dropout driver output stage enables operation from a single 2.25-V to 3-V supply

Applications

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

Procurement Notes

Verify the specific ordering suffix 'CPWR' against the latest TI Package Option Addendum to confirm status and packaging details. The datasheet indicates this specific variant may be obsolete; ensure the selected part number matches current production availability requirements before finalizing procurement plans.

Selection Notes

Select the MAX3318ECPWR for applications requiring low-voltage RS-232 communication with minimal power consumption. Ensure the system design accommodates the 2.25-V to 3-V supply range and includes the required four 0.1-μF capacitors for the internal charge pump. Verify that the 0°C to 70°C commercial temperature range meets the environmental constraints of the target application.

Part Context

The MAX3318E series belongs to Texas Instruments' portfolio of low-voltage RS-232 interface solutions designed for portable electronics. This family emphasizes power efficiency through auto-power-down features while maintaining compatibility with standard RS-232 signaling levels. The CPWR designation specifically identifies the commercial temperature grade version packaged in a 20-pin Thin Shrink Small Outline Package (TSSOP).

Replacement Considerations

Publicly confirmed substitutes include TRS3318ECPWR and MAX3318IPWR. Verify pin compatibility and electrical specifications before substitution.