Part Number: PCA9544A The I2C expansion chip of PCA9544A, after the value of its register is modified, why does it read out unchanged? The device address is 0x70, and the register I read and write is 0x0
The software is to open the I2C…
Part Number: PCA9544A Hello, Team
according to the datasheet page6,
'
"total bus capacitance of one bus line"
Does it mean SDA/SCL allow 400pF not including each channel SD0/SC0、SD1/SC1、SD2/SC2、SD3/SC3 and calculate C-Load separately?
…
Part Number: PCA9544A Other Parts Discussed in Thread: PCF8574A Hi All,
One more question regarding I2C addressing.
PCA9544A has 3 address select pins. Usually it is enough to tie them up or down for infinity.
But this time I need to change address on…
Part Number: PCA9544A Other Parts Discussed in Thread: INA226 Hi
I am new to PCA9544APW I2C Bus-Expander. I2C expander is connected between MSP432 and multiple INA226(current sensors). Do you have any sample code for PCA9544APW? I need guidance to make…
Part Number: PCA9544A The datasheet states "If unused, interrupt input(s) must be connected to VCC", can they be connected directly to Vcc (like A0, A1) or do they need a pull-up?
Thanks for the help.
Part Number: PCA9544A Other Parts Discussed in Thread: TCA9544A Hi,
I would like to use PCA9544A for below system:
- Master : 3.3V I2C - Slave : 1.8V I2C
Below information shows Vpass = 1.9V when Vcc = 3.3V
But the Figure 12 shows Vpass = 25V when Vcc…
Part Number: PCA9544A Hi,
VDPU0~3 power will be supplied in MB S5 mode.
VDPUM and VCC is in MB S0 mode.
That means there’s a situation of VDPU0~3 is exist but VDPUM and VCC is no power.
Will it be current leakage from SDX and SCX to VDD/SDA/SCL…
Part Number: PCA9544A Hi Team,
A customer wants to confirm if the I2C lines of PCA9544APW can sink 8mA. They have 2 PCB stacked with a total of 3 pull ups on the SDA and SCL lines. The resistors are: 10K, 2.8K and 523Ohms. Equivalent resistance is 422 ohms…
Part Number: PCA9544A Other Parts Discussed in Thread: TCA9548A , TCA9544A I’m looking for a part like the PCA9544A with 8 channels instead of 4. Do we have anything like that?
Mux should support a chip reset and indivdual channel interrupts
Part Number: PCA9544A Other Parts Discussed in Thread: TCA9544A Dear sir:
May I have some question for PCA9544A and PCA9546A ... ?
PCA9544A 4-Channel I2C And SMBus Multiplexer With Interrupt Logic
PCA9546A 4-Channel I2C And SMBus Switch With Reset Funct…
