SN74HC157DBR datasheet by Texas Instruments

SN74HC157DBR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC157DBR?
  The maximum operating frequency of the SN74HC157DBR is 50 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure proper power sequencing when using the SN74HC157DBR?
  To ensure proper power sequencing, it is recommended to power up the VCC pin before the input signals, and power down the VCC pin after the input signals. This helps to prevent latch-up and damage to the device.
• What is the recommended operating voltage range for the SN74HC157DBR?
  The recommended operating voltage range for the SN74HC157DBR is 2V to 6V, with a typical operating voltage of 5V.
• How do I handle unused inputs on the SN74HC157DBR?
  Unused inputs on the SN74HC157DBR should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure proper device operation.
• What is the maximum current that the SN74HC157DBR can sink or source?
  The maximum current that the SN74HC157DBR can sink or source is 25 mA per output pin, with a total device current limit of 100 mA.