• TCA9555: May I have some question regarding TCA9555?

  

  TAlex Wu

  TI Thinks Resolved

  Part Number: TCA9555 Other Parts Discussed in Thread: PCA9554 , PCA9555 , PCA9554A , TCA9535 Dear Sir: May I have some question regarding TCA9555? Regarding the TCA9555PWR, can pins P00 through P17 be configured only as Input (I) or Output ( Open…

  • 1 month ago
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• TCA9555: TCA9555 state after startup

  

  Herbert Wang

  TI Thinks Resolved

  Part Number: TCA9555 Tool/software: Dear Expert: For TCA9555RGER, if it is pull-up state of the port in the default after startup?

  • 8 months ago
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• TCA9555: TCA9555 high quiescent current in standby mode low inputs

  

  Julie Moreau

  TI Thinks Resolved

  Part Number: TCA9555 Tool/software: Hello, From the TCA9555's datasheet, for low inputs, the quiescent current in standby mode is 1.5 mA max while it is 40 µA max for operating mode. The quiescent current is then much higher in standby mode than in…

  • over 1 year ago
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Answered

• TCA9555: TCA9555 PWR Consumption Question

  

  Elvis Han

  Resolved

  Part Number: TCA9555 Tool/software: Hi TI Team, We used TCA9555 IO Expander with limited pwr budget. Please help us to clarify the PWR consumptions under 3V3. 1.The third row I OH = -10mA (Negative means current source from IC to the outside); The…

  • Resolved

  • over 1 year ago
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• TCA9555: Wider Operation Temperature

  

  Joyce Gao

  TI Thinks Resolved

  Part Number: TCA9555 Other Parts Discussed in Thread: TCA6408A-Q1 , TCAL6408 , TCAL9538 , TCAL6416 , TCAL9539 Tool/software: Hi expert, Could you help recommend a replacement for TCA9555PWR for a wider operating temperature (over 85℃)? Joyce

  • 3 months ago
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Answered

• TCA9555: External I/O Pull-up resistor

  

  Chris Wang

  Resolved

  Part Number: TCA9555 Other Parts Discussed in Thread: TCA9535 Tool/software: For battery-powered applications. The TCA9555 includes pull-up resistors for I/O, so the TCA9555 does not require additional external pull-up resistors for I/O. The…

  • Resolved

  • 4 months ago
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Answered

• TCA9555: for LED application

  

  Tommy Tzeng

  Resolved

  Part Number: TCA9555 Other Parts Discussed in Thread: PCF8574A , PCF8575 , PCF8574 , TCA9554 , PCA9555 , PCA9554 , PCA9554A , TCA9554A , TCA9535 Tool/software: Hi Sir, we use the TCA9555 design for LED application, there any issue with this schematic…

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  • 4 months ago
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• TCA9555: Input State Retention Without I2C Host Power

  

  Grzegorz Wozny

  Resolved

  Part Number: TCA9555 Tool/software: Hi everyone, I’m using the TCA9555RTWR I/O expander in my design and I have a question regarding its behavior in the following scenario: Does the TCA9555 retain the logic level on its input / outputs pins if…

  • Resolved

  • 4 months ago
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Answered

• TCA9555: Does it have concern to use multiple pcs TCA9555

  

  Terry Hu

  Resolved

  Part Number: TCA9555 Other Parts Discussed in Thread: TCA9617B Tool/software: Hi Team, Note that TCA9555 can support up to 8pcs on a same BUS. Could you please help to advise if there is any concern to use multiple pcs of TCA9555 on a same I2C BUS…

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  • over 1 year ago
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• TCA9555: Calculating Icc when driving LEDs

  

  Kodi

  Resolved

  Part Number: TCA9555 Other Parts Discussed in Thread: TCA9535 , Tool/software: Hi, I have a question regarding I/O Icc when using an I/O expander to drive an LED using either the TCA9555 or the TCA9535. Is there a way to calculate what the additional…

  • Resolved

  • 7 months ago
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