PCF8574N

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCF8574 SCPS068J – JULY 2001 – REVISED MARCH 2015 PCF8574 Remote 8-Bit I/O Expander for I2C Bus 1 Features 1 Low Standby-Current Consumption of 10 μA Max I2C to Parallel-Port Expander Open-Drain Interrupt Output Compatible With Most Microcontrollers Latched Outputs With High-Current Drive Capability for Directly Driving LEDs Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II 2 Applications Telecom Shelters: Filter Units Servers Routers (Telecom Switching Equipment) Personal Computers Personal Electronics Industrial Automation Products with GPIO-Limited Processors 3 Description 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 highcurrent 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 PCF8574 Device Information(1) PACKAGE (PIN) BODY SIZE (NOM) TVSOP (20) 5.00 mm × 4.40 mm SOIC (16) 10.30 mm × 7.50 mm PDIP ...