The maximum operating frequency of the SN54LS147J is 35 MHz, but it can vary depending on the specific application and operating conditions.
To ensure reliable operation in high-temperature environments, it is recommended to follow proper thermal management practices, such as providing adequate heat sinking and airflow, and ensuring that the device is operated within its specified temperature range (-55°C to 125°C).
The recommended power-on sequence for the SN54LS147J is to apply power to the VCC pin before applying any input signals, and to ensure that all input signals are stable before applying power to the VCC pin.
Unused inputs on the SN54LS147J should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure reliable operation.
The maximum input voltage that can be applied to the SN54LS147J is 5.5V, which is the maximum rating for the device. Applying voltages above this can cause damage to the device.