Part Number: TCA9555 Other Parts Discussed in Thread: TCA9535 Hi Sir,
We use the TCA9555RTWR to extend GPIO numbers, but the power consumption can't meet the spec in datasheet.
In datasheet the power consumption at operating mode is 30uA(max), but in …
Part Number: TCA9555
What range does the internal IO-Pullup of TCA9555DB have, 100kOhm +/- ? Ohm?
The background is that with high impedance input signals at the expander, the levels drift upwards due to the internal pull-up.
Part Number: TCA9555 Other Parts Discussed in Thread: TCA9534 I'm using four TCA9555 devices over a single I2C bus at 400KHz. In particulary noisy conditions, the bus is busy and I recover it sendind to the slave TCA9555 a train of 9 clock pulses…
Part Number: TCA9555 Hi Sirs,
TCA9555 can support I2C standard and fast mode but I cannot find how to set it!
Will it auto-switch between these modes or what should I do if I want to fix it fast mode?
Part Number: TCA9555 The clock frequency of I2C is designed at 327kHz. In I2C BUS—FAST MODE, the AC specs of t_icr and t_icf are up to 300ns in the data sheet, but I think this value is the value when f_scl is up to 400kHz.
What I want to check is…
Part Number: TCA9555 Hi team,
A quick question, can we just use the internal 100kohm for pull up and not use the external pull-up resistor if we can limit the output current for P07-P00 and P17-P10 below 80mA each and 160mA total ?
Unfortunately, our 9555 device does NOT have the ability to disable the internal pull up resistor. If the internal pull up resistor is a problem, then I think the next best solution would be to replace the TCA9555 with the TCA9535 which comes…
I looked over the parts of the schematic and circuitry directly associated with TCA9555 (U4250), and nothing stood out as wrong for me, assuming your I2C lines are properly open-drain (rather than push-pull), and assuming your bus capacitance is…