CAT9554 ,I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt2CAT9554, CAT9554ATable 4. D.C. OPERATING CHARACTERISTICS (V = 2.3 to 5.5 V; T = ï 40°C to +85°C, u ..
CAT9555HV6I-GT2 , 16-bit I2C and SMBus I/O Port with Interrupt
CAV424 , C/U transducer IC with adjustable output voltage
CB1AH-12V , MINI-ISO AUTOMOTIVE RELAY Agricultural equipment, Conveyor, etc.
CB1F-M-12V , MINI-ISO AUTOMOTIVE RELAY Agricultural equipment, Conveyor, etc.
CB1F-P-12V , MINI-ISO AUTOMOTIVE RELAY Agricultural equipment, Conveyor, etc.
CD82C284-12 ,Clock Generator and Ready Interface for 80C286 ProcessorsFeatures Description• Generates System Clock for 80C286 Processors The Intersil 82C284 is a clock g ..
CD82C37A ,CMOS High Performance Programmable DMA Controllerfeatures for flexible operation.• Fully TTL/CMOS CompatibleThe 82C37A is designed to be used with an ..
CD82C50A-5 ,CMOS Asynchronous Communications Element82C50ACMOS AsynchronousCommunications ElementMarch 1997
CD82C52 ,CMOS Serial Controller InterfaceFeatures Description• Single Chip UART/BRG The Intersil 82C52 is a high performance programmableUni ..
CD82C54 ,CMOS Programmable Interval Timer
CD82C55A-5 ,CMOS Programmable Peripheral Interface
CAT9554
I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt
CAT9554, CA T9554A
8-bit I2 C and SMBus I/O Port
with Interrupt
Description
The CAT9554 and CAT9554A are CMOS devices that provide 8ïbit
parallel input/output port expansion for I2 C and SMBus compatible
applications. These I/O expanders provide a simple solution in
applications where additional I/Os are needed: sensors, power
switches, LEDs, pushbuttons, and fans.
The CAT9554/9554A consist of an input port register, an output port
register, a configuration register, a polarity inversion register and an2 C/SMBusïcompatible serial interface.
Any of the eight I/Os can be configured as an input or output by
writing to the configuration register. The system master can invert the
CAT9554/9554A input data by writing to the activeïhigh polarity
inversion register.
The CAT9554/9554A features an active low interrupt output which
indicates to the system master that an input state has changed.
The devices extended addressing capability allows up to 8 devices
to share the same bus. The CAT9554A is identical to the CA T9554
except the fixed part of the I2 C slave address is different. This allows
up to 16 of devices (eight CAT9554 and eight CAT9554A) to be
connected on the same bus.
Features 400 kHz I2 C Bus Compatible (Note 1) 2.3 V to 5.5 V Operation Low Standïby Current 5 V Tolerant I/Os 8 I/O Pins that Default to Inputs at Powerïup High Drive Capability Individual I/O Configuration Polarity Inversion Register Active Low Interrupt Output Internal Powerïon Reset No Glitch on Powerïup Noise Filter on SDA/SCL Inputs Cascadable up to 8 Devices Industrial Temperature Range 16ïlead SOIC and TSSOP, and 16ïpad TQFN (4 x 4 mm) Packages These Devices are PbïFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications White Goods (dishwashers, washing machines) Handheld Devices (cell phones, PDAs, digital cameras) Data Communications (routers, hubs and servers)
TQFNï16
HV4 SUFFIX
CASE 510AE
http://
SOICï16
W SUFFIX
CASE 751BG
PIN CONNECTIONS
SOIC (W), TSSOP (Y)
(Top View)
I/O1
I/O0
VCC
SDA
SCL
INT
I/O7
I/O6
I/O5
I/O4
I/O2
I/O3
VSS
TSSOPï16
Y SUFFIX
CASE 948AN
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
ORDERING INFORMATION
TQFN 4 x 4 mm (HV4)
(Top View)
SCL
INT
I/O7
I/O6
I/O1
I/O0
I/O2
