MAX7221EWG+T datasheet by Maxim Integrated Products

MAX7221EWG+T Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the MAX7221EWG+T can handle?
  The MAX7221EWG+T can handle clock frequencies up to 40 MHz.
• How do I ensure that the MAX7221EWG+T is properly initialized?
  To ensure proper initialization, the MAX7221EWG+T requires a power-on reset (POR) pulse on the RESET pin, followed by a clock signal on the CLK pin.
• What is the purpose of the NOE (No Operation Enable) pin?
  The NOE pin is used to disable the MAX7221EWG+T's output drivers, allowing the device to enter a low-power state.
• How do I configure the MAX7221EWG+T for 7-segment or 14-segment displays?
  The MAX7221EWG+T can be configured for 7-segment or 14-segment displays by setting the appropriate bits in the Mode Register (MR) and the Digit Register (DR).
• What is the maximum current that the MAX7221EWG+T can sink or source?
  The MAX7221EWG+T can sink or source up to 25mA per segment, with a total current limit of 100mA.