SCPS068J July 2001 – March 2015 PCF8574
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 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)].
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||PACKAGE (PIN)||BODY SIZE (NOM)|
|PCF8574||TVSOP (20)||5.00 mm × 4.40 mm|
|SOIC (16)||10.30 mm × 7.50 mm|
|PDIP (16)||19.30 mm × 6.35 mm|
|TSSOP (20)||6.50 mm × 4.40 mm|
|QFN (16)||3.00 mm × 3.00 mm|
|VQFN (20)||4.50 mm × 3.50 mm|