Integrated Circuits
PCF8574AT
The PCF8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)). The devices consist of eight quasi-bidirectional ports, 100 kHz I2C-bus interface, three hardware address inputs and interrupt output operating between 2.5 V and 6 V
BRAND - PHILLIPS
PACKAGE - SO16
DATASHEET
RC4558DT IC
SN74HC541N HLF
SN74HCT541DWR
These octal buffers and line drivers are designed to have the performance of the popular ’HC240 series devices and to offer a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit board layout.
BRAND - TEXAS INSTRUMENTS
PACKAGE - SOIC 20
DATASHEET