Product Overview
The PCAL9539APW,118 is a 16-bit Input/output (GPIO) Expander with interrupt and reset for I²C-bus/SMBus applications. The NXP I/O expander provides a simple solution when additional I/Os are needed while keeping interconnections to a minimum. In addition to providing a flexible set of GPIOs, the wide VDD range of 1.65 to 5.5V allows the PCAL9539A to interface with next-generation microprocessors and microcontrollers where supply levels are dropping down to conserve power. The expander contains the PCA9539 register set of four pairs of 8-bit configuration, input, output and polarity inversion registers and additionally, the PCAL9539A has Agile I/O, which are additional features specifically designed to enhance the I/O. The additional features includes programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, maskable interrupt, interrupt status register, programmable open-drain or push-pull outputs.
Low standby current consumption
Schmitt-trigger action allows slow input transition and better switching noise immunity
Open-drain active LOW interrupt output (INT)\
Internal power-ON reset
Power-up with all channels configured as inputs
No glitch on power-up
Latched outputs with 25mA drive maximum capability for directly driving LEDs
Latch-up performance exceeds 100 mA per JESD 78, class II
Bank selectable push-pull or open-drain output stages
Read-only register identifies the source of an interrupt
Input port register values changes are kept until the input port register is read
Floating input or pull-up/pull-down resistor enable
Mask prevents the generation of the interrupt when input changes state
100kR Pull-up/down resistor
Applications
Communications & Networking, Sensing & Instrumentation, Power Management
Product Information
Chip Configuration: 16bit
Bus Frequency: 400kHz
IC Interface Type: I2C
Supply Voltage Min: 1.65V
Supply Voltage Max: 5.5V
Interface Case Style: TSSOP
No. of Pins: 24Pins
No. of I/O's: 16I/O's
Product Range: -
MSL: MSL 1 - Unlimited
What's in the box
1 x Nxp (2428175) I/O Expander
