SN74HCT244DBLE datasheet by Texas Instruments

SN74HCT244DBLE Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HCT244DBLE?
  The maximum operating frequency of the SN74HCT244DBLE is 50 MHz, but it can vary depending on the system design and capacitive load.
• How do I handle the output enable (OE) pin in my design?
  The output enable (OE) pin should be connected to a logic low (GND) to enable the outputs, and to a logic high (VCC) to disable the outputs. If left unconnected, the OE pin will float high, disabling the outputs.
• What is the recommended power-on sequence for the SN74HCT244DBLE?
  The recommended power-on sequence is to apply power to VCC before applying any input signals. This ensures that the device is properly initialized and minimizes the risk of latch-up or damage.
• Can I use the SN74HCT244DBLE in a 5V system?
  Yes, the SN74HCT244DBLE is compatible with 5V systems, but it's essential to ensure that the input signals do not exceed the maximum rating of 5.5V to prevent damage.
• How do I determine the correct pull-up resistor value for the inputs?
  The pull-up resistor value depends on the system requirements and the input capacitance. A general guideline is to use a pull-up resistor value between 1 kΩ and 10 kΩ. However, it's recommended to consult the system design requirements and perform simulations to determine the optimal value.