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CAT9555: I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt

Overview
Specifications
Packages
Datasheet: I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt
Rev. 11 (170.0kB)
»View Material Composition
»Product Change Notification (8)
Product Overview
Product Description
The CAT9555 is a CMOS device that provides 16-bit parallel input/output port expansion for I²C 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 CAT9555 consists of two 8-bit Configuration ports (input or output), Input, Output and Polarity inversion registers, and an I²C/SMBus-compatible serial interface.

Any of the sixteen I/Os can be configured as an input or output by writing to the configuration register. The system master can invert the CAT9555 input data by writing to the active-high polarity inversion register.

The CAT9555 features an active low interrupt output which indicates to the system master that an input state has changed.

The three address input pins provide the device's extended addressing capability and allow up to eight devices to share the same bus. The fixed part of the I²C slave address is the same as the CAT9554, allowing up to eight of these devices in any combination 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
  • 16 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
Tutorials (1) Package Drawings (3)
Data Sheets (1)  
Availability and Samples
Product
Status
Compliance
Description
Package
MSL*
Container
Budgetary Price/Unit
Type
Case Outline
Type
Qty.
CAT9555HV6I-GT2 Lifetime
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt TQFN-24 510AG 1 Tape and Reel 2000  
CAT9555WI Last Shipments
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt SOIC-24W 751BK 3 Tube 31  
CAT9555WI-T1 Last Shipments
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt SOIC-24W 751BK 3 Tape and Reel 1000  
CAT9555YI Lifetime
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt TSSOP-24 948AR 1 Tube 62  
CAT9555YI-T2 Active
Pb-free
Halide free
I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt TSSOP-24 948AR 1 Tape and Reel 2000 $0.76
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
Mouser   (2015-07-09) : <1K
ON Semiconductor   (2015-07-08) : 10,000
PandS   (2015-07-09) : >1K
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Arrow   (Fri Jul 10 15:10:26 MST 2015) : 1613
Mouser   (2015-07-09) : <1K
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2015-07-08) : 2,160
Market Leadtime (weeks) : 4 to 8
Digikey   (2015-07-09) : >1K
Mouser   (2015-07-09) : >1K
PandS   (2015-07-09) : >1K
Datasheet: I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt
Rev. 11 (170.0kB)
»View Material Composition
»Product Change Notification (8)
Product Overview

Product Compliance Status Description I/O Cascadable VCC Min (V) VCC Max (V) Interrupt Output I/O Pullups LED Blink/PWM IO Min (mA) Package Type
 Pb-free 
 Halide free 
 Active     I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt   16   8 Slave ID Addresses   2.3   5.5   Yes   Yes   No   10   TSSOP-24 
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