74AC245M datasheet by STMicroelectronics

74AC245M Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the 74AC245M?
  The maximum operating frequency of the 74AC245M is typically 100 MHz, but it can vary depending on the specific application and operating conditions.
• How do I handle the output enable (OE) pin in my design?
  The output enable (OE) pin should be connected to a logic signal that is asserted low to enable the outputs and de-asserted high to disable the outputs. It's recommended to use a pull-up resistor to ensure the OE pin is not left floating.
• What is the recommended power-on sequence for the 74AC245M?
  The recommended power-on sequence is to apply power to the VCC pin first, followed by the input signals, and then assert the output enable (OE) pin low. This ensures that the device is properly initialized and minimizes the risk of latch-up or damage.
• Can I use the 74AC245M in a 3.3V system?
  Yes, the 74AC245M is compatible with 3.3V systems, but it's essential to ensure that the input signals are within the recommended voltage range (Vih = 2.0V, Vil = 0.8V) to maintain proper operation.
• How do I handle the thermal considerations for the 74AC245M?
  The 74AC245M has a maximum junction temperature (Tj) of 150°C. Ensure proper heat dissipation by using a heat sink or a PCB design that allows for adequate airflow. Also, follow the recommended thermal derating guidelines to prevent overheating.