MAX3318EUP+

Overview

The MAX3318EUP+ 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 and utilizes a proprietary low-dropout transmitter output stage with a dual-charge pump requiring only four 0.1µF capacitors. The device guarantees data rates up to 460kbps and features AutoShutdown Plus technology, which reduces supply current to 1µA when inputs are inactive for over 30 seconds. It includes a READY logic-level output indicating charge pump regulation status and is housed in a 20-pin TSSOP package.

Feature Summary

• AutoShutdown Plus functionality automatically enters low-power shutdown mode after 30 seconds of input inactivity
• Proprietary low-dropout transmitter output stage enables RS-232 compatibility at voltages as low as 2.25V
• Integrated dual-charge pump voltage converter generates internal supplies using only four external capacitors
• READY output pin asserts high when the charge pump is regulating and the device is ready for transmission

Applications

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

Procurement Notes

Verify the component manufacturer against official Analog Devices or Maxim Integrated documentation to confirm authenticity. Ensure the ordering suffix matches the required temperature range and packaging specifications. Cross-reference the part number with authorized distributor catalogs to validate availability and compliance with relevant standards before procurement.

Selection Notes

Select this component for applications requiring low-voltage operation between 2.25V and 3.0V. The MAX3318EUP+ is suitable for designs needing automatic power management via AutoShutdown Plus without BIOS modifications. Verify that the system load capacitance and data rate requirements do not exceed the guaranteed 460kbps limit under worst-case conditions.

Part Context

This device belongs to the MAX3316–MAX3319 family of 2.5V RS-232 transceivers. The MAX3318 specifically provides two transmitters and two receivers, distinguishing it from the single-channel MAX3319. It shares the same core architecture and low-power features as its siblings while offering full duplex communication capabilities in a compact 20-pin TSSOP form factor.

Replacement Considerations

Public confirmed substitute part numbers include MAX3318EAP and MAX3318CUP within the same product family.