• TCA9554: the P-port voltage consideration

  

  hui zhang

  TI Thinks Resolved

  Part Number: TCA9554 TCA9554 datasheet shows "when an I/O in configured as an input, input voltage may be raised above VCC", what is the voltage range for the I/O when used as input? Can I/O lower than VCC?

  • over 4 years ago
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Answered

• TCAL6416: Schematic review of TCAL6416PWR

  

  sharique Ansari

  Resolved

  Part Number: TCAL6416 Other Parts Discussed in Thread: TPS22960 , , PCF8574 , TCA9554 , TCA9554A , TCA9555 , PCF8574A , PCA9554A , PCA9555 , PCA9554 , PCF8575 Tool/software: Hello, We have used TPS22960 in our project. We have made schematic as per reference circuit…

  • Resolved

  • 3 months ago
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• TCA9554: Address input

  

  Shinya Sawamoto

  Resolved

  Part Number: TCA9554 Hello, I have a question about TCA9554 address input pins(A0/A1/A2). Are those inputs recognized only in power up sequence or any time? Thanks in advance. S.Sawamoto

  • Resolved

  • over 5 years ago
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• TCA9554: TCA9554 vs TCA9554A

  

  Martin Gold

  TI Thinks Resolved

  Part Number: TCA9554 Hi Team, my customer ask for the difference between TCA9554 and TCA9554A. Could you please explain this? Thanks Martin

  • over 5 years ago
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• TCA9554: By-pass capacitors recommendation

  

  Shinya Sawamoto

  Resolved

  Part Number: TCA9554 Hello, Let me ask what are the by-pass capacitors recommendation for TCA9554. I found that there are 2 by-pass capacitors connection recommended on the datasheet but can't find the best value combination. Could you tell that? …

  • Resolved

  • over 5 years ago
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• TCA9554: INT keep low Issue

  

  Jim CHEN

  TI Thinks Resolved

  Part Number: TCA9554 Dear Team, We don’t configure this TCA9554PWR GPIO pin, but the INT# still keep low by chipset. Do you have any idea to share?

  • over 5 years ago
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• TCA9554: how to setting for unused pin

  

  dimitry chen

  Resolved

  Part Number: TCA9554 Hi my design is i2c to 4 bit, what should i do for anther 4 unused pin pull down ? or register setting ?

  • Resolved

  • over 5 years ago
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• TCA9554: TCA9544

  

  Kailyn Chen

  Resolved

  Part Number: TCA9554 Dear, Using TCA9544, 2V power supply, and our customer find that why the INT couldn't pull up to high level and stay 0.9V with 10Kohm pull up resistor？ When changed to 1K, it is normally. According to the source current of datasheet…

  • Resolved

  • over 5 years ago
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• [FAQ] I2C IO Expander Schematic Checklist

  

  Tyler Townsend

  Other Parts Discussed in Thread: PCF8574 , TCA9554 , TCA9554A , TCA9555 , PCF8574A , PCA9554A , PCA9555 , PCA9554 , PCF8575 FAQ: Logic and Voltage Translation > IxC >> I2C IO Expander Schematic Checklist IO Expander Checklist Check Status…

  • 5 months ago
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• RE: PCA9554: PCA9554PWR

  

  Tyler Townsend

  I forgot this in my response just now. Please try moving to the TCA9554. This device is more robust, uses newer process technology, has wider voltage range, can run up to 400kHz, and fixes any errata present in the PCA9554. TCA9554 is p2p (pin to pin…

  • 8 months ago
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