PCA9555 16-bit I2C-bus And SMBus I/O Port With Interrupt

The PCA9555 is a 24-pin CMOS device that provides 16 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. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI Power Switches Sensors push buttons, LEDs fans, etc. The PCA9555 consists of two 8-bit Configuration (Input or Output selection); Input, Output and Polarity Inversion (active HIGH or active LOW operation) Registers The system master 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 or Output Register The polarity of the read Register CAN be inverted with the Polarity Inversion Register All Registers CAN be read by the system master. Although pin-to-pin and I2C-bus address compatible with the PCF8575 software changes are required due to the enhancements, and are discussed in Application Note AN469. The PCA9555 open-drain interrupt 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. The power-on reset sets the Registers to their default values and initializes the device state machine. Three hardware pins (A0, A1, A2) vary the fixed I22C-bus address and allow up to eight devices to share the same I2C-bus SMBus The fixed I2C-bus address of the PCA9555 is the same as the PCA9554 allowing up to eight of these devices in any combination to share the same I2C-bus SMBus
By NXP Semiconductors
Part Manufacturer Description Datasheet Samples
PCA9555PWR Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-TSSOP -40 to 85
PCA9555PWRE4 Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-TSSOP -40 to 85
PCA9555RHLR Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85
PCA9555DWRG4 Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-SOIC -40 to 85
PCA9555RGERG4 Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85
PCA9555DWG4 Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-SOIC -40 to 85
PCA9555DBG4 Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-SSOP -40 to 85
PCA9555RGER Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-VQFN -40 to 85
PCA9555DBRG4 Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-SSOP -40 to 85
PCA9555DGVRG4 Texas Instruments Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-TVSOP -40 to 85
PCA9555 's PackagesPCA9555 's pdf datasheet
PCA9555BS HVQFN
PCA9555D SO
PCA9555DB SSOP
PCA9555HF HWQFN
PCA9555N DIP
PCA9555PW TSSOP

PCA9555 pdf datasheet download


PCA9555 Pinout, Pinouts
PCA9555 pinout,Pin out
This is one package pinout of PCA9555,If you need more pinouts please download PCA9555's pdf datasheet.

PCA9555 Application circuits
PCA9555 circuits
This is one application circuit of PCA9555,If you need more circuits,please download PCA9555's pdf datasheet.


Related Electronics Part Number

Related Keywords:

PCA9555 Pb-Free PCA9555 Cross Reference PCA9555 Schematic PCA9555 Distributor
PCA9555 Application Notes PCA9555 RoHS PCA9555 Circuits PCA9555 footprint
Hot categories