This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation.
The PCF8574A device provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].
The device features an 8-bit quasi-bidirectional I/O port (P0–P7), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.
|Part number||Order||Number of I/Os||VCC (Min) (V)||VCC (Max) (V)||Frequency (Max) (kHz)||Features||Addresses||Rating||Operating temperature range (C)||Package Group|
||8||2.5||6||100||Interrupt pin||8||Catalog||-40 to 85||
PDIP | 16
SOIC | 16
TSSOP | 20
TVSOP | 20
VQFN | 20