The PCA9536 is an 8-pin CMOS device that provides 4 bits of General Purpose parallel Input/Output (GPIO) expansion for I²C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I²C-bus I/O expanders. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
The PCA9536 consists of a 4-bit Configuration register (input or output selection), 4-bit Input Port register, 4-bit Output Port register and a 4-bit Polarity Inversion register (active HIGH or active LOW operation). The system controller can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input Port or Output Port register. The polarity of the read register can be inverted with the Polarity Inversion register. All registers can be read by the system controller.
The power-on reset sets the registers to their default values and initializes the device state machine.
The I²C-bus address is fixed and allows only one device on the same I²C-bus/SMBus.
Choose a diagram:
3 results
Include 0 NRND
Part | Order | CAD Model | No of bits | VDD [min] | VDD [max] | Over volt tolerant | No of supplies | Standby current [typ] (µA) | Max Sink Current per bit (mA) | Max Sink Current, per package (mA) | Source Current per bit (mA) | Output mode | Input mode: invert option | Internal pull-up resistor per bit (kOhm) | I2C-bus (kHz) | Footprint body and leads | Package Type | Operating Temperature (°C) | No of Addresses |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4 | 2.3 | 5.5 | Y | 1 | 0.25 | 25 | 100 | 10 | Totem pole | Y | 100 | 400 | 31 | SO8 | -40~85 | 1 | |||
4 | 2.3 | 5.5 | Y | 1 | 0.25 | 25 | 100 | 10 | Totem pole | Y | 100 | 400 | 15.81 | TSSOP8 | -40~85 | 1 | |||
4 | 2.3 | 5.5 | Y | 1 | 0.25 | 25 | 100 | 10 | Totem pole | Y | 100 | 400 | 9.61 | HVSON8 | -40~85 | 1 |
Quick reference to our documentation types.
10 documents
Compact List
10 documents
Compact List
4 design files
To get further assistance directly from NXP, please see our Engineering Services.
1 engineering service
To find additional partner offerings that support this product, visit our Partner Marketplace.
There are no recently viewed products to display.
