SN74LS123DG4 datasheet by Texas Instruments

SN74LS123DG4 Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74LS123DG4?
  The maximum operating frequency of the SN74LS123DG4 is 10 MHz, but it can vary depending on the specific application and operating conditions.
• How do I handle the power-up reset of the SN74LS123DG4?
  The SN74LS123DG4 has an internal power-up reset circuit that holds the outputs in a reset state until the supply voltage reaches a minimum of 2.5V. However, it's recommended to use an external power-up reset circuit to ensure a clean reset signal.
• What is the recommended operating voltage range for the SN74LS123DG4?
  The recommended operating voltage range for the SN74LS123DG4 is 4.75V to 5.25V, but it can operate from 4.5V to 5.5V with reduced performance.
• How do I interface the SN74LS123DG4 with a microcontroller?
  The SN74LS123DG4 can be interfaced with a microcontroller using standard TTL logic levels. Ensure that the microcontroller's output voltage is within the SN74LS123DG4's input voltage range, and use pull-up or pull-down resistors as needed to ensure proper signal levels.
• What is the maximum output current of the SN74LS123DG4?
  The maximum output current of the SN74LS123DG4 is 24 mA per output, but it's recommended to limit the output current to 16 mA to ensure reliable operation.