SCPS123F March 2005 – January 2015 PCF8575C
This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 4.5-V to 5.5-V VCC operation.
The PCF8575C provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface serial clock (SCL) and serial data (SDA).
The device features a 16-bit quasi-bidirectional input/output (I/O) port (P07–P00, P17–P10), 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 in 3-state mode. The strong pullup to VCC allows fast-rising edges into heavily loaded outputs. This device turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be high before being used as inputs. After power on, as all the I/Os are set to 3-state, all of them can be used as inputs. Any change in setting of the I/Os as either inputs or outputs can be done with the write mode. If a high is applied externally to an I/O that has been written earlier to low, a large current (IOL) flows to GND.
|PART NUMBER||PACKAGE (PIN)||BODY SIZE|
|PCF8575C||SSOP (24)||8.20 mm × 5.30 mm|
|QSOP (24)||8.65 mm × 3.90|
|TVSOP (24)||5.00 mm × 4.50 mm|
|SOIC (24)||15.40 mm × 7.50 mm|
|TSSOP (24)||7.80 mm × 4.40 mm|
|QFN (24)||4.0 mm × 4.0 mm|