See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

PW | 20

Temp:

I (-40 to 85)

ECO Plan:

Green (RoHS & no Sb/Br)

PCF8574APWR


Remote 8-Bit I/O Expander for I2C-Bus

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Texas Instruments PCF8574APWR

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.

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