SN74121DE4 datasheet by Texas Instruments

SN74121DE4 Frequently Asked Questions (FAQs)

• What is the maximum frequency of operation for the SN74121DE4?
  The maximum frequency of operation for the SN74121DE4 is 25 MHz, but it can be operated at higher frequencies with reduced voltage and load capacitance.
• How do I ensure reliable operation of the SN74121DE4 in high-temperature environments?
  To ensure reliable operation in high-temperature environments, it's essential to follow proper thermal management practices, such as providing adequate heat sinking, using a thermally conductive material, and keeping the junction temperature below 150°C.
• What is the recommended power-on sequence for the SN74121DE4?
  The recommended power-on sequence for the SN74121DE4 is to apply VCC before applying any input signals, and to ensure that VCC reaches its minimum specified voltage before applying any input signals.
• How do I handle the output enable (OE) pin in the SN74121DE4?
  The output enable (OE) pin should be connected to a valid logic level (either VCC or GND) to ensure proper operation. Leaving the OE pin floating can cause unpredictable behavior.
• What is the maximum input voltage that the SN74121DE4 can tolerate?
  The maximum input voltage that the SN74121DE4 can tolerate is 5.5V, which is the absolute maximum rating. Exceeding this voltage can cause permanent damage to the device.