SN74HCT157D datasheet by Texas Instruments

SN74HCT157D Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN74HCT157D?
  The maximum frequency of operation for the SN74HCT157D is typically 40 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure signal integrity when using the SN74HCT157D?
  To ensure signal integrity, use short signal traces, minimize impedance mismatches, and use termination resistors if necessary. Also, ensure that the power supply is clean and well-regulated.
• Can I use the SN74HCT157D with 3.3V or 2.5V logic levels?
  Yes, the SN74HCT157D is compatible with 3.3V or 2.5V logic levels, but the output voltage will be limited to the supply voltage (VCC). Ensure that the input signals are compatible with the device's input voltage range.
• How do I handle power sequencing when using the SN74HCT157D?
  To avoid latch-up or other issues, ensure that the power supply (VCC) is applied before the input signals. Also, ensure that the power supply is stable and well-regulated before applying input signals.
• What is the maximum current that the SN74HCT157D can sink or source?
  The SN74HCT157D can sink or source up to 6 mA of current per output pin, but it's recommended to limit the current to 4 mA or less to ensure reliable operation.