MAX218CPP

Drivers, Receivers, Transceivers Overview

The MAX218CPP 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 Plastic DIP package and supports an operating temperature range of 0°C to +70°C.

Drivers, Receivers, Transceivers 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
• Provides a low-power shutdown mode that reduces supply current to 1µA while allowing receiver monitoring
• Features three-state receiver outputs suitable for wire-ORing multiple interfaces at the UART

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix CPP corresponds to the 20-pin Plastic DIP package and the commercial temperature range (0°C to +70°C). Confirm RoHS compliance status as required by local regulations. Ensure the ordering documentation matches the exact part number to avoid confusion with other package variants like SSOP or Wide SO.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing portable systems requiring RS-232 communication powered by two series battery cells. It is suitable for applications needing minimal power consumption during idle states via the shutdown pin. Verify that the system logic levels are compatible with the CMOS receiver outputs swinging rail-to-rail between GND and VCC.

Drivers, Receivers, Transceivers Part Context

The MAX218 is part of Maxim Integrated's family of low-power RS-232 transceivers. It serves as a cost-effective alternative to bipolar transceivers by eliminating the need for negative supply rails or complex voltage regulation circuits. The device simplifies PCB layout by integrating charge pump components, reducing the total external component count compared to traditional solutions.

Drivers, Receivers, Transceivers Replacement Considerations

MAX3218

Drivers, Receivers, Transceivers FAQ

Can the MAX218 operate directly from a single lithium cell?

Yes, the device can be powered directly from a single lithium cell due to its wide operating voltage range of 1.8V to 4.25V.

What happens to the receivers during shutdown mode?

During shutdown mode, the receivers can remain active to monitor external devices, or they can be disabled under logic control via the EN pin.

How does the MAX218 handle unused driver inputs?

Unused driver inputs should be connected to either GND or VCC to ensure stable operation.