74HC7403D datasheet by NXP Semiconductors

74HC7403D Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the 74HC7403D?
  The maximum operating frequency of the 74HC7403D is typically around 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 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 74HC7403D?
  NXP recommends using a 10 kΩ resistor and a 10 μF capacitor in series between the VCC pin and GND to ensure a proper power-on reset. This circuit helps to prevent latch-up and ensures that the device starts up in a known state.
• Can I use the 74HC7403D in a 5V system?
  Yes, the 74HC7403D 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 74HC7403D in my specific application?
  The propagation delay of the 74HC7403D depends on the operating frequency, temperature, and load capacitance. You can use the datasheet's propagation delay vs. frequency graph to estimate the delay, or use simulation tools like SPICE to model your specific application.