TLC7524IDR datasheet by Texas Instruments

TLC7524IDR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with TLC7524IDR?
  The maximum clock frequency that can be used with TLC7524IDR is 100 kHz. However, it's recommended to use a clock frequency of 50 kHz or less to ensure reliable operation.
• How do I ensure that the TLC7524IDR is properly powered up and initialized?
  To ensure proper power-up and initialization, make sure to follow the recommended power-up sequence: VCC, VDD, and then CLKIN. Also, ensure that the CLKIN signal is stable and within the recommended frequency range before applying the CS (chip select) signal.
• What is the recommended value for the external resistor (REXT) connected to the IREF pin?
  The recommended value for REXT is 2.2 kΩ. This value sets the internal reference current and affects the output voltage range of the TLC7524IDR.
• Can I use the TLC7524IDR in a multi-voltage system?
  Yes, the TLC7524IDR can be used in a multi-voltage system. However, ensure that the voltage on the VCC pin is within the recommended range (4.5 V to 5.5 V) and that the voltage on the VDD pin is within the recommended range (2.7 V to 5.5 V). Also, ensure that the voltage on the output pins does not exceed the maximum rating.
• How do I troubleshoot issues with the TLC7524IDR, such as incorrect output voltages or failure to switch?
  To troubleshoot issues with the TLC7524IDR, start by verifying the power-up sequence, clock frequency, and CS signal. Check the output voltage levels and ensure that they are within the expected range. Also, verify that the input signals (such as the address and data signals) are correct and stable. If issues persist, consult the datasheet and application notes for further guidance.