The maximum operating frequency of the SN74LS648NT is 35 MHz, but it can vary depending on the load capacitance and the output current.
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 recommended operating temperature range of -40°C to 85°C.
The recommended power-on sequence for the SN74LS648NT is to apply power to the VCC pin before applying any input signals, and to ensure that the input signals are stable before applying the clock signal.
To handle bus contention when using the SN74LS648NT as a bus transceiver, it is recommended to use a bus arbiter or a bus controller to manage access to the bus, and to ensure that only one device is driving the bus at a time.
The maximum output current of the SN74LS648NT is 15 mA per output pin, but it can be limited by the total device power dissipation and the output voltage.
SN74LS648NT datasheet
by Texas Instruments
