• 

  Joyce Li

  • 3 months ago
  • Interface
  • Interface forum

  PCA9557: about thermal resistance, Rjt, Rjc and Rjb

  • Resolved

  Part Number: PCA9557 Hi dear experts, Would you please provide PCA9557 Rjt, Rjc and Rjb information
• 

  BOBBY

  • 4 months ago
  • Interface
  • Interface forum

  RE: PCA9557: Please, help to reproduce a chip getting stuck on Power-on-Reset (errata 10.1 from the datasheet)

  "1. I assume that after the powerup measured in scopeshot above the IC was locked for I2C communication. Is this correct?" The set up had external pull up resistors, but during that particular case the IC's SDA got locked so I2C communication...
• 

  Kazuki Kuramochi

  • 8 months ago
  • Interface
  • Interface forum

  PCA9557: communication time out

  • Resolved

  Part Number: PCA9557 Hello expert, I have question for PCA9557 's behavior regarding SMBus
• 

  Antony Fu

  • over 1 year ago
  • Interface
  • Interface forum

  PCA9557: IBIS model for PCA9557

  TI Thinks Resolved

  Part Number: PCA9557 Hello, Customer is asking whether we have IBIS model about PCA9557, so would you like to help us check whether we have it? Thanks, Antony
• 

  user4030081

  • over 1 year ago
  • Interface
  • Interface forum

  PCA9557: About I2C behavior in the case where the lock-up

  • Resolved

  Part Number: PCA9557 Hi dear supporting team, The dataseet says If ramp conditions are outside
• 

  Vera Mao

  • over 3 years ago
  • Interface
  • Interface forum

  PCA9557: about PCA9557 and TCA9557

  TI Thinks Resolved

  Part Number: PCA9557 Hi dear supporting team, I heard there is a bug on PCA9557 , and it is revised on TCA9557, may I know what the bug is? and are these two chips fully pin2pin compatible? Customer found PCA9557 has very high requirement on POR...
• 

  Vera Mao

  • over 3 years ago
  • Interface
  • Interface forum

  PCA9557: about PCA9557 I/O impedance

  TI Thinks Resolved

  Part Number: PCA9557 hi dear supporting team, for PCA9557 I/O, besides P0, all other ports has no high impedance mode, correct? tks!
• 

  Harsh Beriwal

  • over 1 year ago
  • MSP low-power microcontrollers
  • MSP low-power microcontroller forum

  MSP430F6779A: Need help with I2C pins for reading input

  TI Thinks Resolved

  Part Number: MSP430F6779A I am new to both TI devices(I am using MSP430F6779A) and I2C. I learned the basic but now I am facing a problem. I am unable to read input which is connected to an I/O expander (slave) and then to the I2C pins (SDA and SCL) of...
• 

  Vera Mao

  • over 3 years ago
  • Interface
  • Interface forum

  PCA9557: about PCA9557 TJ

  Part Number: PCA9557 hi dear supporting team, what's the max junction temp of PCA9557PWR? there is no information in d/s. and from calculation, the max power consumption at 3.6V is only 0.079mW, is this correct?
• 

  Ryan Eslinger

  • over 1 year ago
  • Power management
  • Power management forum

  RE: LDO

  Hi Harsh, We do not have an LDO that fits your application in a single chip solution at this time. TLV758P can be used with an I2C expander such as PCA9557 and additional external resistors to achieve an adjustable output from 0.55 V to 3 V similar...

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