SN74LS109AD datasheet by Texas Instruments

SN74LS109AD Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74LS109AD?
  The maximum operating frequency of the SN74LS109AD is 35 MHz, but it can vary depending on the load capacitance and the output current.
• How do I ensure reliable operation of the SN74LS109AD in high-temperature environments?
  To ensure reliable operation in high-temperature environments, it is recommended to operate the device within the recommended operating temperature range of 0°C to 70°C, and to follow proper thermal management practices such as providing adequate heat sinking and airflow.
• Can I use the SN74LS109AD in a 3.3V system?
  No, the SN74LS109AD is a 5V device and is not compatible with 3.3V systems. Using it in a 3.3V system may result in reduced performance, incorrect operation, or even damage to the device.
• How do I handle the power-up and power-down sequencing of the SN74LS109AD?
  It is recommended to power up the VCC pin before applying any input signals, and to power down the VCC pin after removing all input signals. This helps to prevent unwanted output states and ensures proper device operation.
• What is the recommended input rise and fall time for the SN74LS109AD?
  The recommended input rise and fall time for the SN74LS109AD is 10 ns or less to ensure proper device operation and to prevent metastability.