MAX218EAP+T

Overview

The MAX218EAP+T is a dual RS-232 transceiver designed for battery-powered EIA/TIA-232E and V.28/V.24 interfaces. It operates from a single supply voltage ranging from +1.8V to +4.25V, enabling direct connection to two alkaline, NiCd, or NiMH cells without external regulators. The device integrates on-board DC-DC converters to generate true RS-232 voltage levels. It features two drivers and two receivers with a guaranteed data rate of 120kbps. A shutdown mode reduces current consumption to 1µA. The component is housed in a 20-pin SSOP package.

Feature Summary

• Operates directly from two alkaline, NiCd, or NiMH cells within a +1.8V to +4.25V supply range
• Integrates on-board DC-DC converters to maintain true RS-232 and EIA/TIA-562 voltage levels
• Includes a low-power shutdown mode that reduces current consumption to 1µA while allowing receiver monitoring
• Provides three-state receiver outputs suitable for wire-ORing multiple interfaces at the UART

Applications

• Battery-powered equipment
• Computers
• Printers
• Peripherals
• Instruments

Procurement Notes

Verify the specific suffix 'EAP' confirms the -40°C to +85°C industrial temperature range and the 20-pin SSOP package format. Confirm RoHS compliance status through official manufacturer documentation before finalizing procurement specifications.

Selection Notes

Select this component when designing portable systems requiring direct operation from two-cell battery packs without voltage regulation. Ensure the application supports the required external inductor and diode components for the internal switch-mode power supply generation.

Part Context

This part belongs to the MAX218 family of low-power RS-232 transceivers. It is distinguished by its ability to function from very low supply voltages compared to standard bipolar counterparts. The 'E' designation indicates extended temperature performance, while 'AP' specifies the surface-mount SSOP packaging.

Replacement Considerations

The MAX3218 offers pin-compatible functionality with added AutoShutdown capabilities. Other alternatives include the MAX220 series for different channel counts or the MAX3232 for standard 5V operation requirements.