PCA9554/PCA9554A 8-bit I2C-bus And SMBus I/O Port With Interrupt

The PCA9554 and PCA9554A are 16-pin CMOS devices that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus SMBus applications and were 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, 400 kHz Clock frequency, 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 PCA9554 PCA9554A consist of an 8-bit Configuration Register (Input or Output selection); 8-bit Input Port Register 8-bit Output Port Register and an 8-bit Polarity Inversion Register (active HIGH or active LOW operation). 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 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 master. Although pin-to-pin and I2C-bus address compatible with the PCF8574 series, software changes are required due to the enhancements and are discussed in Application Note AN469. The PCA9554 PCA9554A 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 I2C-bus address and allow up to eight devices to share the same I2C-bus SMBus The PCA9554A is identical to the PCA9554 except that the fixed I2C-bus address is different allowing up to sixteen of these devices (eight of each) on the same I2C-bus SMBus
By NXP Semiconductors
Part Manufacturer Description Datasheet Samples
PCA9554CPWJ NXP Semiconductors PCA9554CPW - Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up
PCA9554BS3,118 NXP Semiconductors IC 8 I/O, PIA-GENERAL PURPOSE, PQCC16, 4 X 4 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT-629-1, HVQFN-16, Parallel IO Port
PCA9554AN,112 NXP Semiconductors IC 8 I/O, PIA-GENERAL PURPOSE, PDIP16, 0.300 INCH, PLASTIC, SOT38-4, DIP-16, Parallel IO Port
PCA9554AD/G,528 NXP Semiconductors PCA9554AD - 8-bit I2C-bus and SMBus I/O port with interrupt
PCA9554N,112 NXP Semiconductors IC 8 I/O, PIA-GENERAL PURPOSE, PDIP16, 0.300 INCH, PLASTIC, SOT38-4, DIP-16, Parallel IO Port
PCA9554DB/G,118 NXP Semiconductors 8-bit I2C-bus and SMBus I/O port with interrupt, SOT338-1 Package, Standard Marking, Reel Pack, SMD, 13"
PCA9554D/G,528 NXP Semiconductors 8-bit I2C-bus and SMBus I/O port with interrupt, SOT162-1 Package, Standard Marking, Reel Dry Pack, SMD, 13", Turned
PCA9554APW/G,118 NXP Semiconductors 8-bit I2C-bus and SMBus I/O port with interrupt, SOT403-1 Package, Standard Marking, Reel Pack, SMD, 13"
PCA9554PW/G,118 NXP Semiconductors 8-bit I2C-bus and SMBus I/O port with interrupt, SOT403-1 Package, Standard Marking, Reel Pack, SMD, 13"
PCA9554PW/Q900,118 NXP Semiconductors 8-bit I2C-bus and SMBus I/O port with interrupt, SOT403-1 Package, Standard Marking, Reel Pack, SMD, 13"
PCA9554 's PackagesPCA9554 's pdf datasheet
PCA9554ABS HVQFN
PCA9554AD SO
PCA9554ADB SSOP
PCA9554AN DIP
PCA9554APW TSSOP
PCA9554ATS SSOP
PCA9554BS HVQFN
PCA9554D SO
PCA9554DB SSOP
PCA9554N DIP
PCA9554PW TSSOP
PCA9554TS SSOP

PCA9554 pdf datasheet download


PCA9554 Pinout, Pinouts
PCA9554 pinout,Pin out
This is one package pinout of PCA9554,If you need more pinouts please download PCA9554's pdf datasheet.

PCA9554 Application circuits
PCA9554 circuits
This is one application circuit of PCA9554,If you need more circuits,please download PCA9554's pdf datasheet.


Related Electronics Part Number

Related Keywords:

PCA9554 Pb-Free PCA9554 Cross Reference PCA9554 Schematic PCA9554 Distributor
PCA9554 Application Notes PCA9554 RoHS PCA9554 Circuits PCA9554 footprint
Hot categories