Part Number: PCA9555 Hi all,
I could not find the english datasheet. Listed thermal resistance in other language datasheet is 35.5-deg/W. Is it correct value?
Regards, ACGUY
Part Number: PCA9555 Other Parts Discussed in Thread: TCA9555 Customer ask if we have I2C example code for PCA9555? It is best base on MSP430. I try search in TI.com and do not find any design reference for PCA9555 , so I double confirm in here, thanks…
Part Number: PCA9555 Hi,
The PCA9555 functional block diagram (datasheet figure 18) indicates there is an internal 100K pull up resistor on each I/O, causing an IO when configured as input to be pulled high.
The application diagram figure 29 on page 24…
Part Number: TCA9555 Hi team,
I am confused about the description about the power on reset in the datasheet.
There is a description: After that, Vcc must be lowered to 0V and then back up to the operating voltage for a power-reset cycle.
So for the power…
Part Number: PCF8575 Other Parts Discussed in Thread: PCA9555 , PCF8574 Hi,
Good Day. I have a customer who is working with PCF8575. Please see below his query for your reference. Thank you very much.
I am currently creating a board with the following…
Hi Max
Could you reply my question "If PCA9555 were not properly initialized at power-up, how could we make it operating normally without power on again?" by mail, thanks.
The waveform of PCA9555 Vcc pin meets the VCC ramp conditions incloud…
Part Number: PCA9555 Hi team
We use PCA9555 for LED control,
sometimes, we cloud find the I/Os (P00-P07 & P10-P13) are low (about 0.1V) while power on with I2C set output initial.
somtimess, we cloud find the status of I/Os (P00-P07 & P10-P13) are…
Part Number: PCA9555 Hi team,
In use of PCA9555, the follwings were recommended.
" INT should always be pulled up (never left floating) when used. If unused, it can be pulled down to ground, but not left floating ."
If the INT pin is floated…
Hi Matthias,
Yes, this is fine to do from an electrical perspective and also often gives the best thermal performance (since the increased copper mass on the ground plane acts as a heat sink).
Max
