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

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.

特性
  • 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
应用
  • Input/output Port Expansion for Extended Addressing Capability
终端产品
  • White goods (dishwashers, washing machines)
  • Handheld devices (cell phones, PDAs, digital cameras)
  • Data Communications (routers, hubs and servers)
封装
封装图纸 (3)
Document TitleDocument ID/SizeRevision
SOIC-24, 300 mils751BK (57.1kB)revo
TQFN24, 4x4510AG (57.0kB)B
TSSOP24, 4.4x7.8948AR (56.4kB)A
数据表 (1)
Document TitleDocument ID/SizeRevisionRevision Date
I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low InterruptCAT9555/D (170.0kB)11
产品订购型号
产品状况Compliance封装MSL*容器预算价格 (1千个数量的单价)
CAT9555HV6I-GT2Last ShipmentsPb-free Halide freeTQFN-24510AG1Tape and Reel2000
CAT9555WILast ShipmentsPb-free Halide freeSOIC-24W751BK3Tube31
CAT9555WI-T1Last ShipmentsPb-free Halide freeSOIC-24W751BK3Tape and Reel1000
CAT9555YILast ShipmentsPb-free Halide freeTSSOP-24948AR1Tube62
CAT9555YI-T2ActivePb-free Halide freeTSSOP-24948AR1Tape and Reel2000$0.76
订购产品技术参数
ProductI/OCascadableVCC Min (V)VCC Max (V)Interrupt OutputI/O PullupsLED Blink/PWMIO Min (mA)
CAT9555YI-T2168 Slave ID Addresses2.35.5YesYesNo10
I/O Port Expander, I2C / SMBus, 16-Bit, with Active Low Interrupt (170.0kB) CAT9555
TQFN24, 4x4 CAT9555
SOIC-24, 300 mils CAT9555
TSSOP24, 4.4x7.8 CAT9555