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MAX3221 - +3V to +5.5V RS-232 Transceivers

Description

The MAX3221/MAX3223/MAX3243 achieve 1µA supply current with Maxim’s revolutionary AutoShutdown™ feature.

When the MAX3221/MAX3223/MAX3243 do not sense a valid signal level on their receiver inputs, the onboard power supply and drivers shut down.

Features

  • Integrated Charge Pump Circuitry Simplifies Power Requirements.
  • Eliminates the Need for a ±12 Supply.
  • Operation From a Single +3.3V or +5V Supply.
  • 1µA Supply Current in Shutdown Mode Saves Power.
  • AutoShutdown Feature is Enabled After No Activity on Receiver Inputs for 30µs.
  • Software Control Option for Shutdown Ordering Information PART TEMP RANGE PIN-.

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Full PDF Text Transcription

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Click here for production status of specific part numbers. MAX3221/MAX3223/ MAX3243 +3V to +5.5V RS-232 Transceivers with AutoShutdown General Description The MAX3221/MAX3223/MAX3243 achieve 1µA supply current with Maxim’s revolutionary AutoShutdown™ feature. When the MAX3221/MAX3223/MAX3243 do not sense a valid signal level on their receiver inputs, the onboard power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off. The system turns on again when a valid level is applied to any RS-232 receiver input. The MAX3221/MAX3223/MAX3243 require only 0.1µF capacitors in 3.3V operation, and can operate from input voltages ranging from +3.0V to +5.5V.
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