SN74LS123D datasheet by Texas Instruments

SN74LS123D Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN74LS123D?
  The maximum frequency of operation for the SN74LS123D is typically 2 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure reliable operation of the SN74LS123D in high-temperature environments?
  To ensure reliable operation in high-temperature environments, it is recommended to follow proper thermal management practices, such as providing adequate heat sinking and airflow, and ensuring that the device is operated within its specified temperature range (-40°C to 85°C).
• What is the recommended power-on sequence for the SN74LS123D?
  The recommended power-on sequence for the SN74LS123D is to apply power to the VCC pin first, followed by the input signals. This helps to prevent unwanted oscillations and ensures proper device operation.
• How do I handle the output of the SN74LS123D when the input signals are not present?
  When the input signals are not present, the output of the SN74LS123D will be in a high-impedance state. To handle this, it is recommended to use a pull-up or pull-down resistor on the output to ensure a defined logic level.
• Can I use the SN74LS123D in a 3.3V or 1.8V system?
  The SN74LS123D is a 5V device, but it can be used in 3.3V or 1.8V systems with proper level shifting or voltage translation. However, this may require additional circuitry and careful design consideration to ensure proper operation.