SN54AS821JT datasheet by Texas Instruments

SN54AS821JT Frequently Asked Questions (FAQs)

• What is the recommended operating temperature range for the SN54AS821JT?
  The recommended operating temperature range for the SN54AS821JT is -40°C to 85°C. However, it's essential to note that the device can operate up to 125°C for short periods, but this may affect its reliability and lifespan.
• How do I ensure the SN54AS821JT is properly powered?
  To ensure proper power supply, connect the VCC pin to a stable 5V power source, and the GND pin to a reliable ground connection. Additionally, decouple the power supply with a 0.1uF ceramic capacitor to reduce noise and ensure stable operation.
• What is the maximum clock frequency supported by the SN54AS821JT?
  The SN54AS821JT can support clock frequencies up to 100 MHz. However, it's essential to ensure that the clock signal is clean and free from noise to prevent errors and ensure reliable operation.
• How do I handle the asynchronous reset input (CLR) on the SN54AS821JT?
  The asynchronous reset input (CLR) should be tied to VCC through a pull-up resistor (typically 1kΩ to 10kΩ) to ensure the device is not inadvertently reset. When the CLR input is driven low, the device will reset, and all outputs will be cleared.
• What is the recommended layout and routing for the SN54AS821JT?
  To minimize noise and ensure reliable operation, it's recommended to follow good PCB design practices, such as keeping signal traces short, using ground planes, and avoiding vias under the device. Additionally, place decoupling capacitors close to the device and use a low-inductance path for the clock signal.