SN74LS245DWG4 datasheet by Texas Instruments

SN74LS245DWG4 Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74LS245DWG4?
  The maximum operating frequency of the SN74LS245DWG4 is 30 MHz, but it can vary depending on the system design and capacitive loading.
• How do I handle bus contention when using the SN74LS245DWG4?
  To handle bus contention, ensure that only one device is driving the bus at a time. Use the output enable (OE) pin to tri-state the outputs when not in use, and consider using a bus arbiter or multiplexer to manage multiple devices accessing the bus.
• What is the maximum current that the SN74LS245DWG4 can sink or source?
  The SN74LS245DWG4 can sink up to 24 mA and source up to 15 mA per output pin, but it's recommended to limit the current to 10 mA per pin to ensure reliable operation.
• Can I use the SN74LS245DWG4 in a 3.3V system?
  The SN74LS245DWG4 is a 5V device, but it can be used in a 3.3V system with some limitations. The output voltage will be lower, and the device may not meet the specified propagation delay and rise/fall times. Consult the datasheet and perform thorough testing to ensure compatibility.
• How do I ensure signal integrity when using the SN74LS245DWG4 in a high-speed application?
  To ensure signal integrity, use a low-impedance PCB design, keep signal traces short, and use termination resistors or series resistors to reduce reflections. Also, consider using a buffer or repeater to regenerate the signal and improve signal quality.