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E/S de propósito general (GPIO) I2C

PCA9554A

ACTIVO

Expansor de E/S I2C/SMBus de 8 bits de 2,3 a 5,5 V con interrupción, pull-up débil y registros de co

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TCA9554A ACTIVO Expansor de E/S I2C/SMBus de 1.65 V a 5.5 V de 8 bits con registros de configuración y subida débil Performance enhancements for power-on reset, interrupt, and lower voltage operation.

PCA9554A

ACTIVO
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Detalles del producto

Number of I/Os 8 Features Configuration registers, Interrupt pin Supply voltage (min) (V) 2.3 Supply voltage (max) (V) 5.5 Addresses 8 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
Number of I/Os 8 Features Configuration registers, Interrupt pin Supply voltage (min) (V) 2.3 Supply voltage (max) (V) 5.5 Addresses 8 Rating Catalog Frequency (max) (MHz) 0.4 Operating temperature range (°C) -40 to 85
SOIC (DW) 16 106.09 mm² 10.3 x 10.3 SSOP (DB) 16 48.36 mm² 6.2 x 7.8 SSOP (DBQ) 16 29.4 mm² 4.9 x 6 TSSOP (PW) 16 32 mm² 5 x 6.4 TVSOP (DGV) 16 23.04 mm² 3.6 x 6.4 VQFN (RGT) 16 9 mm² 3 x 3 VQFN (RGV) 16 16 mm² 4 x 4
  • I2C to Parallel Port Expander
  • Open-Drain Active-Low Interrupt Output
  • Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
  • 5-V Tolerant I/Os
  • 400-kHz Fast I2C Bus
  • Three Hardware Address Pins Allow up to Eight Devices on the I2C/SMBus
  • Input/Output Configuration Register
  • Polarity Inversion Register
  • Internal Power-On Reset
  • Power-Up With All Channels Configured as Inputs
  • No Glitch on Power Up
  • Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • I2C to Parallel Port Expander
  • Open-Drain Active-Low Interrupt Output
  • Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
  • 5-V Tolerant I/Os
  • 400-kHz Fast I2C Bus
  • Three Hardware Address Pins Allow up to Eight Devices on the I2C/SMBus
  • Input/Output Configuration Register
  • Polarity Inversion Register
  • Internal Power-On Reset
  • Power-Up With All Channels Configured as Inputs
  • No Glitch on Power Up
  • Latched Outputs With High-Current Drive Maximum Capability for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

The PCA9554A open-drain interrupt ( INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the PCA9554A can remain a simple slave device.

The device’s outputs (latched) have high-current drive capability for directly driving LEDs and low current consumption.

Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus.

The PCA9554A is pin-to-pin and I2C address compatible with the PCF8574A. However, software changes are required, due to the enhancements in the PCA9554A over the PCF8574A.

The PCA9554A and PCA9554 are identical except for their fixed I2C address. This allows for up to 16 of these devices (8 of each) on the same I2C/SMBus.

The PCA9554A open-drain interrupt ( INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the PCA9554A can remain a simple slave device.

The device’s outputs (latched) have high-current drive capability for directly driving LEDs and low current consumption.

Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus.

The PCA9554A is pin-to-pin and I2C address compatible with the PCF8574A. However, software changes are required, due to the enhancements in the PCA9554A over the PCF8574A.

The PCA9554A and PCA9554 are identical except for their fixed I2C address. This allows for up to 16 of these devices (8 of each) on the same I2C/SMBus.
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Documentación técnica

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* Data sheet PCA9554A Remote 8-Bit I2C and SMBus I/O Expander With Interrupt Output and Configuration Registers datasheet (Rev. F) PDF | HTML 12 mar 2021
Application note I2C Dynamic Addressing 25 abr 2019
Selection guide Logic Guide (Rev. AB) 12 jun 2017
Application note Choosing the Correct I2C Device for New Designs PDF | HTML 07 sep 2016
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 dic 2015
Application note Understanding the I2C Bus PDF | HTML 30 jun 2015
Application note Maximum Clock Frequency of I2C Bus Using Repeaters 15 may 2015
Application note I2C Bus Pull-Up Resistor Calculation PDF | HTML 13 feb 2015
Application note Programming Fun Lights With TI's TCA6507 30 nov 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 jul 2004

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SOIC (DW) 16 Ver opciones
SSOP (DB) 16 Ver opciones
SSOP (DBQ) 16 Ver opciones
TSSOP (PW) 16 Ver opciones
TVSOP (DGV) 16 Ver opciones
VQFN (RGT) 16 Ver opciones
VQFN (RGV) 16 Ver opciones
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