Hi Peter,
This will be much easier to provide support if the customer can provide waveforms of their SCL, SDA, and voltage ramp. If this is in fact the Power-on reset issue, I'd highly suggest trying to lead them toward our TCA9555 which has corrected…
Other Parts Discussed in Thread: TCA6416A , TCA9555 Hi TI Experts,
I wish to use I/O Expander for current project as the MCU has insufficient analog input.
Requirement:
> 16 Input(can read analog signal).
> Interface I2C
> ADC of 16bit/10bits…
Ｈｉ Alex-san, Thank you for your ｓｕｐｐｏｒｔ. I'm sorry to confuse and bother you. Customer wants to use LM25066A like TCA9555. Can you use it in defiance of PMBus layer?
Best Regards, Yusuke/Japan Disty
Hello Kishen,
In the PCA part, when the POR circuit requirements are not met, the POR circuit does not send a reset signal to the digital core, which means the digital core can start up in any state. It may not respond. It is possible if you have either…
Thank you Eldon.
I am awaiting my samples to try myself. This being an issue I've not encountered, I am not sure what other suggestions I can offer until I can try to duplicate the issue in my lab.
Is this a new design, by any chance? Typically…
Hello Jonathan,
Thats perfect !!! I think that TCA9555 is the vital component to my project, because I will use all pins as input with push-buttons.
I was reading the datasheet and I have a doubt: the internal pull-up resistor are already active by…
Hello,
Try having him write the slave address and 0xFF.
There is no register address he must supply to the device, instead he writes the data to the ports directly.
Have him read section 8.1 on page 11 of the datasheet.
In another note, if…
The TCA9539 does not offer voltage translation (in other words, the I2C bus and P-port GPIOs have to operate at the same voltage).
The TCA6416A does offer voltage translation, where VCCI supplies power to the I2C interface and VCCP provides power to…
Other Parts Discussed in Thread: TCA9555 , TCA9539 , TCA6416 I am comparing the data sheet of TCA6416, and TCA9555 and TCA9539. http://www.ti.com/lit/ds/symlink/tca9539.pdf http://www.ti.com/lit/ds/symlink/tca9539.pdf http://www.ti.com/lit/ds/symlink…
Hi Miranda,
1. The SN74CBTLV3125 can support this hot swap applications as long as the voltages are within abs. max specs:
This device specifically can handle hot swap applications due to the fact that it supports powered off protection. This…
