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CAT9554A: I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt

Datasheet: I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt
Rev. 6 (151.0kB)
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»Product Change Notification (7)
Product Overview
Product Description
The CAT9554A is a CMOS device that provides 8-bit parallel input/output port expansion for I²C and SMBus compatible applications. This I/O expander provides a simple solution in applications where additional I/Os are needed: sensors, power switches, LEDs, pushbuttons, and fans.

The CAT9554A consist of an input port register, an output port register, a configuration register, a polarity inversion register and an I²C/SMBus-compatible 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 input data by writing to the active-high polarity inversion register.

The CAT9554A features an active low interrupt output which indicates to the system master that an input state has changed.

The device's extended addressing capability allows up to 8 devices to share the same bus. The CAT9554A is identical to the CAT9554 except the fixed part of the I²C 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 I2C Bus Compatible
  • 2.3 V to 5.5 V Operation
  • Low Standby Current
  • 5.0 V Tolerant I/Os
  • 8 I/O Pins that Default to Inputs at Power-up
  • High Drive Capability
  • Individual I/O Configuration
  • Polarity Inversion Register
  • Active Low Interrupt Output
  • Internal Power-on Reset
  • No Glitch on Power-up
  • Noise Filter on SDA/SCL Inputs
  • Cascadable up to 8 Devices
  • Industrial Temperature Range
Applications   End Products
  • Input/output Port Expansion for Extended Addressing Capability
 
  • White Goods (Dishwashers, Washing Machines)
  • Handheld Devices (Cell Phones, PDAs, Digital Cameras)
  • Data Communications (Routers, Hubs and Servers)
Technical Documentation & Design Resources
Data Sheets (1) Package Drawings (3)
Availability and Samples
Product
Status
Compliance
Description
Package
MSL*
Container
Budgetary Price/Unit
Type
Case Outline
Type
Qty.
CAT9554AHV4I-GT2 Lifetime
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt TQFN-16 510AE 1 Tape and Reel 2000  
CAT9554AWI-GT2 Consult Sales Office
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt SOIC-16 751BG 1 Tape and Reel 2000  
CAT9554AYI-G Lifetime
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt TSSOP-16 948AN 1 Tube 96  
CAT9554AYI-GT2 Lifetime
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 8-Bit, with Active Low Interrupt TSSOP-16 948AN 1 Tape and Reel 2500  
Moisture Sensitivity level (MSL) for surface mount devices (lead free measured at 260°C reflow, non lead free at 235°C reflow)
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
PandS   (2015-07-09) : >1K
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2015-07-08) : 30,755
Market Leadtime (weeks) : Contact Factory
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