The PCA9571 is a CMOS device that provide 8 bits of General Purpose parallel Output(GPO) expansion in low voltage processor and handheld battery powered mobileapplications. They operate at 1 MHz I2C-bus speeds on a lightly loaded bus (<100 pF)while maintaining backward compatibility to Fast-mode (400 kHz) and Standard-mode(100 kHz).

The PCA9571 is a streamlined GPO that consists of 8-bit push-pull outputs that offer lowcurrent consumption, small packaging options and a low operating voltage range of 1.1 Vto 3.6 V. The latched outputs are symmetrical 4 mA current drive capability at 3.3 V todrive various control logic. The PCA9571 output expanders provide a simple solutionwhen additional outputs are needed while keeping interconnections and floor space to aminimum, for example, in battery powered mobile applications where PCBs are crowdedfor interfacing to sensors, push buttons, etc.

The PCA9571 contains an internal Power-On Reset (POR) and a Software Reset featurethat initializes the device to its default state.

• 1 MHz I2C-bus interface with 6 mA SDA sink capability for lightly loaded buses(<100 pF) and improved power consumption
• Compliant with the I2C-bus Fast and Standard modes
• 1.1 V to 3.6 V operation
• Latched outputs with a sink/source capability of 4 mA at 3.3 V
• Readable device ID (manufacturer, device type, and revision)
• Software Reset
• Power-On Reset
• Low standby current
• ?40 °C to +85 °C operation
• ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM perJESD22-C101
• Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
• Packages offered: XQFN12, TSSOP14 and DHVQFN14

• Smartphones and tablets
• Portable medical equipment
• Portable instrumentation and test measurement