CD74ACT257M datasheet by Texas Instruments

CD74ACT257M Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the CD74ACT257M?
  The recommended operating voltage range for the CD74ACT257M is 4.5V to 5.5V, although it can operate as low as 3.5V with reduced performance.
• How do I ensure signal integrity when using the CD74ACT257M as a quad 2-line to 4-line decoder/demultiplexer?
  To ensure signal integrity, use a low-impedance output driver, keep the output traces short, and use a termination resistor at the receiving end to minimize reflections and ringing.
• What is the maximum frequency of operation for the CD74ACT257M?
  The maximum frequency of operation for the CD74ACT257M is typically around 100 MHz, although this can vary depending on the specific application and operating conditions.
• How do I handle power sequencing when using the CD74ACT257M in a system with multiple power rails?
  To avoid latch-up or other issues, ensure that the VCC pin is powered up before the input signals, and that the input signals are stable before the VCC pin is powered down.
• Is the CD74ACT257M compatible with 3.3V logic levels?
  Yes, the CD74ACT257M is compatible with 3.3V logic levels, although the output voltage levels may be slightly lower than 3.3V due to the internal voltage drop.