The PCF8574 device is an 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation. It provides general-purpose remote I/O expansion for most micro-controller …

TI’s PCF8574 is a 8-bit 2.5- to 5.5-V I2C/SMBus I/O expander with interrupt. Find parameters, ordering and quality information

PCF8574A Remote 8-Bit I/O Expander for I2C Bus Features Low standby-current consumption of 10μA max

Oct 21, 2025 · The output high voltage of PCF8574 may just barely be reaching the acceptable range of VBE with its output high voltage. Removing the 47k to GND would eliminate that excess current …

In the I/O expander application shown here, the PCF8574 or PCF8574A is used with P0 and P1 as inputs and P2 to P7 as outputs. When used in this configuration, during a write, the inputs (P0 and …

The PCF8574 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface [serial clock (SCL), serial data (SDA)].

Therefore, to "configure" a PCF8574 pin as an output, it should be driven HIGH and connected to the output of a slave. The slave (with pull-down architecture, standard for I2C communication) will be …

The PCF8574 device provides general-purpose remote I/O expansion for most microcontroller families by way of the I2C interface [serial clock (SCL), serial data (SDA)].

Explore Texas Instruments' PCF8575, a versatile I/O expander for efficient data transfer in embedded systems.

Nov 10, 2023 · This would be out of spec for both the PCF8574 from TI and NXP if the current is going through the PCF8574. Waiting for the scope shots to double confirm the device is being written to …