SN74HC27DBR datasheet by Texas Instruments

SN74HC27DBR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC27DBR?
  The maximum operating frequency of the SN74HC27DBR 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 output is enabled when OE is low and disabled when OE is high. You should connect OE to a logic low signal to enable the output, and to a logic high signal to disable the output.
• What is the recommended power-on reset (POR) circuit for the SN74HC27DBR?
  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 proper power-on reset. This circuit helps to ensure that the device powers up in a known state.
• Can I use the SN74HC27DBR in a 5V system?
  Yes, the SN74HC27DBR 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 SN74HC27DBR?
  The propagation delay of the SN74HC27DBR depends on the operating frequency, temperature, and load capacitance. You can refer to the datasheet for the typical propagation delay values, or use the Texas Instruments SPICE model to simulate the device behavior in your specific application.