The maximum operating frequency of the SN74LS151DR is 25 MHz.
To ensure reliable operation in high-temperature environments, ensure that the device is operated within the recommended operating temperature range of 0°C to 70°C, and that the device is properly heat-sinked to prevent overheating.
The recommended power-on sequence for the SN74LS151DR is to apply power to the VCC pin before applying any input signals to the device.
Unused inputs on the SN74LS151DR should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure proper device operation.
The maximum current that the SN74LS151DR can sink or source is 24 mA.