MAX3318EEUP+

Overview

The MAX3318EEUP+ is a dual-transmitter, dual-receiver RS-232-compatible transceiver manufactured by Analog Devices Inc. (Maxim Integrated). It operates on a single +2.25V to +3.0V supply voltage and utilizes a proprietary low-dropout transmitter output stage with a dual charge pump. The device supports data rates up to 460kbps and features AutoShutdown Plus technology, which reduces supply current to 1µA when inputs remain inactive for over 30 seconds. It includes a READY logic-level output indicating charge pump regulation status. The component is housed in a 20-pin TSSOP package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically enters low-power shutdown mode upon detecting inactivity or cable disconnection, restoring operation upon valid signal transitions without BIOS modifications.
• Integrated dual charge pump generates internal voltage rails from a single low-voltage supply, eliminating the need for external voltage triplers or switched-mode power supplies.
• Includes a READY output pin that asserts high when the internal charge pumps are regulating and the device is prepared for transmission.
• Provides INVALID output signaling to detect the absence of valid RS-32 voltage levels on receiver inputs.

Applications

• Palmtop Computers
• Hand-Held Instruments
• Cellular Phones
• GPS Systems

Procurement Notes

Verify the specific suffix 'EUP+' against official documentation to confirm the extended temperature range (-40°C to +85°C), TSSOP-20 packaging, and lead-free compliance status. Ensure the source document explicitly links these attributes to this exact part number before procurement.

Selection Notes

Select the MAX3318EEUP+ for applications requiring automatic power management via AutoShutdown Plus and operation strictly within the 2.25V to 3.0V supply range. This model is appropriate where space-saving 20-pin TSSOP packaging is required alongside guaranteed 460kbps performance under worst-case load conditions.

Part Context

This component belongs to the MAX3316–MAX3319 family of 2.5V RS-232 transceivers. While sharing core architecture with siblings like the MAX3316 and MAX3317, the MAX3318 specifically integrates AutoShutdown Plus and the INVALID/READY outputs, distinguishing it from models relying solely on manual SHDN control.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-model comparisons within the family require verification of specific feature sets such as AutoShutdown Plus availability and pin compatibility.