PCA9571 2 Remote 8-bit general purpose outputs for 1 MHz I C-bus Rev. 2 21 September 2018 Product data sheet 1. General description 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 mobile 2 applications. They operate at 1 MHz I C-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 low current consumption, small packaging options and a low operating voltage range of 1.1 V to 3.6 V. The latched outputs are symmetrical 4 mA current drive capability at 3.3 V to drive various control logic. The PCA9571 output expanders provide a simple solution when additional outputs are needed while keeping interconnections and floor space to a minimum, for example, in battery powered mobile applications where PCBs are crowded for interfacing to sensors, push buttons, etc. The PCA9571 contains an internal Power-On Reset (POR) and a Software Reset feature that initializes the device to its default state. 2. Features and benefits 2 1MHz I C-bus interface with 6 mA SDA sink capability for lightly loaded buses (<100 pF) and improved power consumption 2 Compliant with the I C-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 per JESD22-C101 Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA Package offered: XQFN12 3. Applications Smartphones and tablets Portable medical equipment Portable instrumentation and test measurementPCA9571 NXP Semiconductors 2 Remote 8-bit general purpose outputs for 1 MHz I C-bus 4. Ordering information Table 1. Ordering information Type number Topside Package mark Name Description Version PCA9571GU 71 XQFN12 plastic, extremely thin quad flat package no leads SOT1174-1 12 terminals body 1.70 2.00 0.50 mm 4.1 Ordering options Table 2. Ordering options Type number Orderable Package Packing method Minimum Temperature part number order quantity PCA9571GU PCA9571GUX XQFN12 Reel 7 Q1/T1 4000 T = 40 Cto+85 C amb *standard mark SMD 5. Block diagram PCA9571 SCL 2 SHIFT OUTPUT INPUT I C-BUS 8 bits P0 to P7 REGISTER PORT FILTER CONTROL SDA write pulse read pulse POWER-ON V DD RESET V SS 002aag670 Fig 1. Block diagram of PCA9571 PCA9571 All information provided in this document is subject to legal disclaimers. NXP B.V. 2018. All rights reserved. Product data sheet Rev. 2 21 September 2018 2 of 30