MAX3223EIPWR

Introduction

The MAX3223EIPWR is a highly integrated communications device designed for Integrated Services Digital Network (ISDN) application. It is a line-powered EIA/TIA-232-D serial port transceiver with an integrated line powered DC-DC converter. The MAX3223EIPWR outputs a ±5V power signal from both its TXD and RTS outputs for powering external modems. This device is a single-supply 3.3V transceiver with ±15kV ESD protection and provides a low-power sleep mode for increased system power savings.

Application Fields

The MAX3223EIPWR is suitable for any application where an EIA/TIA-232-D line-powered transceiver is needed, such as:

• RS-232 Data Communications
• ISDN Data Communications
• Telephone Type B Data Communications

The MAX3223EIPWR is also used in PDAs, notebook computers, and any other application that requires a low-power, line-powered transceiver.

Working Principle

The MAX3223EIPWR is an EIA/TIA-232-D line-powered transceiver that uses an integrated DC-DC converter to convert a 24V DTE signal to a 3V common-mode power level. It is optimized for low power consumption and includes protection against transient voltage and electrostatic discharge (ESD). It is designed to operate over a -32Vve to +32Vve common-mode voltage range.

The MAX3223EIPWR provides an integrated direct-drive sense/control connection for modem control, allowing a single line-powered transceiver to comply with the requirements of Integrated Services Digital Network (ISDN) lines. In addition to the main driver, a high-current backup driver is provided to eliminate the need for a separate line-powered TSD driver.

The MAX3223EIPWR supports sleep modes that allow the device to enter a low-power state when no data is present. This feature further reduces power consumption, allowing the device to be used in small form factor applications.

Conclusion

The MAX3223EIPWR is an integrated line-powered transceiver with an integrated DC-DC converter that is suitable for any application requiring an EIA/TIA-232-D transceiver, such as ISDN, PDA, and notebook computer applications. The device features an integrated direct-drive sense/control connection for modem control and supports sleep modes to reduce power consumption.