HEF4521BT datasheet by NXP Semiconductors

HEF4521BT Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the HEF4521BT?
  The recommended operating voltage range for the HEF4521BT is 4.5V to 15.5V, although it can operate down to 3V with reduced performance.
• How do I ensure the HEF4521BT is properly powered up and initialized?
  To ensure proper power-up and initialization, make sure to follow the recommended power-up sequence, which is to apply VCC before applying any input signals. Also, ensure that the VCC supply is stable and within the recommended range before applying any input signals.
• What is the maximum frequency of operation for the HEF4521BT?
  The maximum frequency of operation for the HEF4521BT is typically around 10MHz, although this can vary depending on the specific application and operating conditions.
• How do I handle the output enable (OE) pin?
  The output enable (OE) pin is active-low, meaning that it must be pulled low to enable the outputs. When OE is high, the outputs are in a high-impedance state. Make sure to connect OE to a valid logic level or use a pull-down resistor to ensure proper operation.
• What is the purpose of the VCC pin, and how should it be connected?
  The VCC pin is the power supply pin for the HEF4521BT. It should be connected to a stable power supply voltage within the recommended range, and decoupling capacitors should be used to filter out noise and ensure reliable operation.