Answered

• TCA9539: TCA9539RTWR output status

  

  Lisa Xu

  Resolved

  Part Number: TCA9539 Tool/software: Dear TI Team: I just want to check IO expander_TCA9539RTWR output status. When one Port of TCA9539RTWR is set to output, it will have 3 status: High,low, and High impedance , Right? Best Regards Lisa

  • Resolved

  • 3 months ago
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Answered

• TCA9539: schematic review

  

  Jeff YANG

  Resolved

  Part Number: TCA9539 Other Parts Discussed in Thread: PCF8574 , TCA9554 , TCA9554A , TCA9555 , PCF8574A , PCA9554A , PCA9555 , PCA9554 , PCF8575 Tool/software: Hi, Would you please hlep review below TCA9539 schematic? thanks! 1108.pdf Jeff

  • Resolved

  • 3 months ago
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• TCA9539-Q1: How should we deal with unused pin of TCA9539-Q1

  

  junsong gu

  TI Thinks Resolved

  Part Number: TCA9539-Q1 Tool/software: HI TI, How should we deal with unused pin of TCA9539-Q1? What is the reset state of these pin? Can we just left it float? BR Junsong Gu

  • 5 months ago
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Answered

• TCA9539-Q1: How TCA9539QPWRQ1 handles interrupt signals?

  

  Daoyan Zhao

  Resolved

  Part Number: TCA9539-Q1 Tool/software: Hi Expert, May I ask 1. How TCA9539QPWRQ1 handles interrupt signals when receive them, regardless of whether they are level triggered or pulse triggered? 2. How TCA9539QPWRQ1 handles when it is edge triggered? Will…

  • Resolved

  • 3 months ago
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Answered

• TCA9539-Q1: [ZF] INT connection

  

  Mingkang Song

  Resolved

  Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 Tool/software: Dear team, If all ports of TCA9539 are set to output mode, then the INT pin has no meaning. Can the INT pin be left unconnected? Thanks! Regards, Mingkang

  • Resolved

  • 4 months ago
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• TCA9539-Q1: Linux driver

  

  Chuqiang Wen

  Answer Suggested

  Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 Tool/software: Hi team, Do we have Linux driver for TCA9539-Q1 can share with customer? Or do we have reference code which can help customer implement in Linux driver? Thanks! Ethan We…

  • 4 months ago
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Answered

• TCA9539-Q1: question about AUTO grade supporting 5V device

  

  Jay wang

  Resolved

  Part Number: TCA9539-Q1 Tool/software: hi expert do we have AUTO grade IO expender and supporting 5V system? sample stage device is OK thanks

  • Resolved

  • 3 months ago
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• TCA9539-Q1: TCA9539QPWRQ1 current check

  

  xin

  TI Thinks Resolved

  Part Number: TCA9539-Q1 Tool/software: How much current of TCA9539-Q1 VCC? How to understand 160mA? In 6.5 and 6.9 chapter, ICC is not over 1mA, is in uA level, my question is, when calculate power current, which current is right?

  • 4 months ago
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• TCA9539: ESD Issue with TCA9539PWR IO Expander

  

  Tom Tsao

  TI Thinks Resolved

  Part Number: TCA9539 Tool/software: Dear TI Support Team, I am contacting you regarding an ESD susceptibility issue observed with the TCA9539PWR IO Expander. During internal testing, the device fails to pass our ESD Air Discharge test at ±10KV, with…

  • 4 months ago
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• TCA9539: tca9539

  

  frederic aberlenc

  TI Thinks Resolved

  Part Number: TCA9539 Tool/software: My SDA and SCL line have a 3.3 volts level and my TCA9539 is powered by 1.8 volts. It works but I dont know if there is a risk od damage. The datasheet is not clear if it is aceptable or not. Can you help me? Than…

  • 8 months ago
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