Part Number: PCF8574 Other Parts Discussed in Thread: TCA8418E When using PCF8574 as the input port, currently, the correct value can be read through I2C for each individual key press. However, when two or more keys are pressed simultaneously, only the…
Part Number: PCF8574 Hello, i have a custom pcb with an arrange as follows
p2 is a PCF8574 pin.
when put in HIGH a voltage about 0,75V is read betwen R3 left side and GND. Not enough to activate MMBT2222.
can be this fixed removing R3A1?
any…
Part Number: PCF8574 Other Parts Discussed in Thread: TCAL6416 , TCAL9539 Tool/software: Hello I have a pcb design using a PCF8574 to generate a reset pulse for DRV8243 wake up.
Is it possible to get a 30 micro second with this io expander?
If not…
Part Number: PCF8574 Tool/software: Dear Sir/Madam,
I am facing GPIO output issue during our product development.
Function description
1.Press PA button, then SOM (controller) be infromed through I2C the PA button is pressed.
2.SOM through…
Part Number: PCF8574 Other Parts Discussed in Thread: MSP430FR2422
Tool/software:
**Subject:** PCF8574 I2C NACK Issue with MSP430FR2422
**Problem Statement:** I am interfacing the PCF8574 with MSP430FR2422 using a bit-banging I2C implementation…
Part Number: PCF8574 Tool/software: HI Team,
our cross ref database lists PCF8574 as "exact match" to NXP PCF8574TS/3,118.
can you please comment if customer should expect any differences in terms of package, pin-out, specs when switching from NXP…
Part Number: PCF8574 Tool/software: Hi All,
I have a question about the PCF8574 datasheet.
The Spike filter limit time has been changed in the Revision History.
Can you tell me why it was changed from 100nsec to 70nsec?
I think the change was…
Part Number: PCF8574 Other Parts Discussed in Thread: ULN2003A , , TCA9534 , TPL7407LA , TLC59108 , PCA9534 Hi team,
I'm facing a strange behavior with the device PCF8574RGTR. I'm using the PCF to drive an ULN2003A that drives a LED. However, when…
Part Number: PCF8574 Other Parts Discussed in Thread: , TM4C129ENCPDT , P82B715 I am writing to PCF8574 and PCF8574A devices using the TI driver under TIRTOS.
TM4C129ENCPDT processor, latest TIRTOS available for this processor is being used.
The…
