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General Description

The MAX3224–MAX3227/MAX3244/MAX3245 are 3V powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features and high data-rate capabilities.

All devices achieve a 1μA supply current using Maxim’s revolutionary AutoShutdown Plus? feature. These devices automatically enter a low-power shutdown mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive, and the UART driving the transmitter inputs is inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiver input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system.

Next Generation Device Features

? For Smaller Packaging:

MAX3228/MAX3229: +2.5V to +5.5V RS-232 Transceivers in UCSP?

? For Low-Voltage or Data Cable Applications:

MAX3380E/MAX3381E: +2.35V to +5.5V, 1μA, 2 Tx/2 Rx RS-232 Transceivers with ±15kV ESD Protected I/O and Logic Pins

? For Integrated ESD Protection:

MAX3222E/MAX3232E/MAX3237E/MAX3241E?/MAX3246E: ±15kV ESD-Protected, Down to 10nA, +3.0V to +5.5V, Up to 1Mbps, True RS-232 Transceivers (MAX3246E Available in UCSP)

Applications

Notebook, Subnotebook, and Palmtop Computers

Cellular Phones

Battery-Powered Equipment

Handheld Equipment

Peripherals

Printers