SN74HC27DT datasheet by Texas Instruments

SN74HC27DT Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC27DT?
  The maximum operating frequency of the SN74HC27DT is 25 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 is active-low, meaning that the outputs are enabled when OE is low and disabled when OE is high. You should connect OE to a logic low signal to enable the outputs, and to a logic high signal to disable them.
• What is the recommended power-on reset (POR) circuit for the SN74HC27DT?
  Texas Instruments recommends using a 0.1 μF capacitor and a 1 kΩ resistor in series between the VCC pin and the GND pin to ensure a clean power-on reset. This circuit helps to prevent spurious outputs during power-up.
• Can I use the SN74HC27DT in a 5V system?
  Yes, the SN74HC27DT is compatible with 5V systems, but you should ensure that the input signals are within the recommended voltage range (VCC - 0.5V to VCC + 0.5V) to prevent damage to the device.
• How do I determine the propagation delay of the SN74HC27DT in my specific application?
  The propagation delay of the SN74HC27DT depends on the operating frequency, temperature, and load capacitance. You can use the datasheet's propagation delay vs. temperature and load capacitance graphs to estimate the delay in your specific application.