Part Number: PCA9539 Tool/software: HI TI Team,
In my design we are using PCA9539DGVR I/O Expander and MCU (S32K144) Please check below schematic for your reference.
I flashed an example code , But when I tried to capture the Signal Slave is not…
Part Number: PCA9539 Other Parts Discussed in Thread: SN74AHC595 , SN74HCS595 , SN74LV595A , TLC5928 , SN54LS673 Tool/software: Please suggest a 16 bit io expander with i2c and having output enable or enable pin
Part Number: PCA9539 Other Parts Discussed in Thread: TCA9617B Hi,
I am testing a board and see some signal integrity issues with I2C bus. In our design, we use FPGA as I2C master with open-drain on I2C bus. we have PCA9539 for IO expansion. we also…
Part Number: PCA9539 Tool/software: We're using the PCA9539RGER i2c GPIO expander and are experiencing issues with some of them. We have used thousands of these chips in the past without any issue. Here is what we are experiencing:
The INT signal on…
Part Number: PCA9539 Other Parts Discussed in Thread: TCA9548A Hi,
In our design we are using a PCA9539PWR. Currently on startup we are seeing some very odd behavior that is undocumented.
For context, our system is using a Nvidia Jetson Orin NX and…
Part Number: PCA9539 Hi,
What is the status of the I2C pins of PCA9539 when PCA9539 is not powered? ( the I2C bus is pull-up to another power rail)
We have lots of I2C devices on the board. We need to use one I2C bus to connect with all these I2C…
Part Number: PCA9539 Other Parts Discussed in Thread: TCA9539 Output impedance PCA9539
we note a PCA9539 output trouble on insitu test, the impedance is lower than usual on PIN N°6 (PO2).
the output is not high impedance
On an unassembled component…
Part Number: PCA9539 Hi team,
I have some questions about how use PCA9539, please help me check, thanks.
1. Does the INT pin and the 16 IOs P0_0~7/P1_0~7 have to use VDD power? Is it possible to use different VDD power? 2. After the chip is reset…
Part Number: PCA9539 Other Parts Discussed in Thread: TCAL9539 , Hi team,
My customer designs Outdoor AP application. And their ambient temperature will be up to 95'C at least.
So do we have similar function solution with higher TA specification?…
Part Number: PCA9539 Other Parts Discussed in Thread: TCA9539 HI team,
Besides the VCC input range being different, Can PCA9539PWR replace TCA9539PWR directly?
thx
