SN74AS74ADR datasheet by Texas Instruments

SN74AS74ADR Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the SN74AS74ADR?
  The recommended operating voltage range for the SN74AS74ADR is 4.5V to 5.5V, although it can operate down to 3V with reduced performance.
• How do I handle the power-up and power-down sequences for the SN74AS74ADR?
  It is recommended to power up the VCC pin before the input signals, and power down the VCC pin after the input signals have been removed. This helps prevent unwanted latch-up or damage to the device.
• What is the maximum clock frequency that the SN74AS74ADR can handle?
  The maximum clock frequency that the SN74AS74ADR can handle is 100 MHz, although this may vary depending on the specific application and operating conditions.
• How do I ensure that the SN74AS74ADR is properly terminated to prevent signal reflections?
  It is recommended to use a series terminator (e.g. 33 ohms) at the clock input and a parallel terminator (e.g. 50 ohms) at the data inputs to prevent signal reflections and ensure proper signal integrity.
• Can I use the SN74AS74ADR in a 3.3V system?
  Yes, the SN74AS74ADR can be used in a 3.3V system, but the output voltage will be limited to 3.3V. Additionally, the device may not meet the specified timing parameters at 3.3V, so careful evaluation of the device's performance is recommended.