PCA9539A 2 Low-voltage 16-bit I C-bus I/O port with interrupt and reset Rev. 2 12 August 2013 Product data sheet 1. General description The PCA9539A is a low-voltage 16-bit General Purpose Input/Output (GPIO) expander 2 with interrupt and reset for I C-bus/SMBus applications. NXP I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum, for example, in ACPI power switches, sensors, push buttons, LEDs, fan control, etc. In addition to providing a flexible set of GPIOs, the wide V range of 1.65 V to 5.5 V DD allows the PCA9539A to interface with next-generation microprocessors and microcontrollers where supply levels are dropping down to conserve power. The PCA9539A contains the PCA9539 register set of four pairs of 8-bit Configuration, Input, Output, and Polarity Inversion registers. The PCA9539A is a pin-to-pin replacement to the PCA9539, and other industry-standard part numbers. A more fully featured part, PCAL9539A is also available with Agile I/O features. See the respective data sheet for more details. The PCA9539A open-drain interrupt (INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed. INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data 2 on its ports without having to communicate via the I C-bus. Thus, the PCA9539A can remain a simple slave device. The device outputs have 25 mA sink capabilities for directly driving LEDs while consuming low device current. The power-on reset sets the registers to their default values and initializes the device state machine. In the PCA9539A, the RESET pin causes the same reset/default I/O input 2 configuration to occur without de-powering the device, holding the registers and I C-bus state machine in their default state until the RESET input is once again HIGH. This input requires a pull-up to V . DD 2 Two hardware pins (A0, A1) select the fixed I C-bus address and allow up to four devices 2 to share the same I C-bus/SMBus.PCA9539A NXP Semiconductors 2 Low voltage 16-bit I C-bus I/O port with interrupt and reset 2. Features and benefits 2 I C-bus to parallel port expander Pin and function compatible with PCA9539 Operating power supply voltage range of 1.65 V to 5.5 V Low standby current consumption: 1.5 A (typical at 5 V V ) DD 1.0 A (typical at 3.3 V V ) DD Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs V = 0.10 V (typical) hys DD 5 V tolerant I/Os Active LOW reset input (RESET) Open-drain active LOW interrupt output (INT) 2 400 kHz Fast-mode I C-bus Internal power-on reset Power-up with all channels configured as inputs No glitch on power-up Latched outputs with 25 mA drive maximum capability for directly driving LEDs Latch-up performance exceeds 100 mA per JESD78, Class II ESD protection exceeds JESD22 2000 V Human Body Model (A114-A) 1000 V Charged-Device Model (C101) Packages offered: TSSOP24, HWQFN24 3. Ordering information Table 1. Ordering information Type number Topside Package marking Name Description Version PCA9539APW PCA9539A TSSOP24 plastic thin shrink small outline package 24 leads SOT355-1 body width 4.4 mm PCA9539AHF 539A HWQFN24 plastic thermal enhanced very very thin quad flat package SOT994-1 no leads 24 terminals body 4 4 0.75 mm 3.1 Ordering options Table 2. Ordering options Type number Orderable Package Packing method Minimum Temperature range part number order quantity PCA9539APW PCA9539APW,118 TSSOP24 Reel 13 Q1/T1 2500 40 C to +85 C *Standard mark SMD PCA9539AHF PCA9539AHF,128 HWQFN24 Reel 13 Q2/T3 6000 40 C to +85 C *Standard mark SMD PCA9539A All information provided in this document is subject to legal disclaimers. NXP B.V. 2013. All rights reserved. Product data sheet Rev. 2 12 August 2013 2 of 39