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Philips SemiconductorsProduct data sheet

8-bit I

2

C and SMBus I/O port with interruptPCA9554/PCA9554A

DESCRIPTION

The PCA9554 and PCA9554A are 16-pin CMOS devices that

provide 8 bits of General Purpose parallel Input/Output (GPIO)

expansion for I

2

C/SMBus applications and were developed to

enhance the Philips family of I@C I/O expanders. The improvements

include higher drive capability, 5V 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,

pushbuttons, LEDs, fans, etc.

FEATURES

•

The PCA9554/54A consist of an 8-bit Configuration register (Input or

Operating power supply voltage range of 2.3 to 5.5 V

Output selection); 8-bit Input register, 8-bit Output register and an

•

5 V tolerant I/Os

8-bit Polarity inversion register (Active-HIGH or Active-LOW

•

operation). The system master can enable the I/Os as either inputs

Polarity inversion register

or outputs by writing to the I/O configuration bits. The data for each

•

Active-LOW interrupt output

Input or Output is kept in the corresponding Input or Output register.

•

Low stand-by current

The polarity of the read register can be inverted with the Polarity

•

Inversion Register. All registers can be read by the system master.

Noise filter on SCL/SDA inputs

Although pin to pin and I

2

C address compatible with the PCF8574

•

No glitch on power-up

series, software changes are required due to the enhancements and

•

are discussed in

Application Note AN469

.

Internal power-on reset

•

The PCA9554/54A open-drain interrupt output is activated when any

8 I/O pins which default to 8 inputs

input state differs from its corresponding input port register state and

•

0 to 400 kHz clock frequency

is used to indicate to the system master that an input state has

•

ESD protection exceeds 2000 V HBM per JESD22-A114,

changed. The power-on reset sets the registers to their default

values and initializes the device state machine.

200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

•

Three hardware pins (A0, A1, A2) vary the fixed I

2

C address and

Latch-up testing is done to JESDEC Standard JESD78 which

allow up to eight devices to share the same I

2

C/SMBus. The

exceeds 100 mA

PCA9554A is identical to the PCA9554 except that the fixed I

2

C

•

Six packages offered: DIP16, SO16, SSOP16, SSOP20,

address is different allowing up to sixteen of these devices (eight of

TSSOP16, and HVQFN16

each) on the same I

2

C/SMBus.

ORDERING INFORMATION

PACKAGES

TEMPERATURE

RANGE

ORDER CODETOPSIDE MARKDRAWING NUMBER

16-Pin Plastic DIP–40 °C to +85 °CPCA9554NPCA9554NSOT38-1

16-Pin Plastic SO (wide)–40 °C to +85 °CPCA9554DPCA9554DSOT162-1

16-Pin Plastic SSOP–40 °C to +85 °CPCA9554DB9554DBSOT338-1

20-Pin Plastic SSOP–40 °C to +85 °CPCA9554TSPCA9554SOT266-1

16-Pin Plastic TSSOP–40 °C to +85 °CPCA9554PW9554DHSOT403-1

16-Pin Plastic HVQFN–40 °C to +85 °CPCA9554BS9554SOT629-1

16-Pin Plastic DIP–40 °C to +85 °CPCA9554ANPCA9554ANSOT38-1

16-Pin Plastic SO (wide)–40 °C to +85 °CPCA9554ADPCA9554ADSOT162-1

16-Pin Plastic SSOP–40 °C to +85 °CPCA9554ADB9554ASOT338-1

20-Pin Plastic SSOP–40 °C to +85 °CPCA9554ATSPA9554ASOT266-1

16-Pin Plastic TSSOP–40 °C to +85 °CPCA9554APW9554ADHSOT403-1

16-Pin Plastic HVQFN–40 °C to +85 °CPCA9554ABS554ASOT629-1

Standard packing quantities and other packaging data are available at /packaging.

I

2

C is a trademark of Philips Semiconductors Corporation.

SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I

2

C patent.

2004 Sep 30

2