PCA9554DBR
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Texas Instruments PCA9554DBR

Manufacturer No:
PCA9554DBR
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC I/O EXPANDER I2C 8B 16SSOP
Delivery:
Payment:
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Product Introduction

Overview

The PCA9554DBR, produced by Texas Instruments, is an 8-bit I2C and SMBus I/O expander designed to provide general-purpose remote I/O expansion for most microcontroller families. This device operates within a voltage range of 2.3V to 5.5V and is compatible with both I2C and SMBus protocols. It features an open-drain interrupt output and configuration registers, allowing for flexible I/O configuration and interrupt handling. The PCA9554DBR is pin-to-pin and I2C address compatible with the PCF8574, although software changes may be necessary due to the enhancements in the PCA9554.

Key Specifications

Parameter Min Typ Max Unit
VCC Supply Voltage Range 2.3 - 5.5 V
Input Voltage Range -0.5 - 6 V
Output Voltage Range -0.5 - 6 V
Continuous Output Low Current - - 50 mA
Continuous Output High Current - - -50 mA
Supply Current (Operating Mode) 20 65 175 μA (at 2.7V, fscl = 400 kHz)
Storage Temperature Range -65 - 150 °C

Key Features

  • 8-bit I/O expander for I2C and SMBus interfaces.
  • Operating voltage range: 2.3V to 5.5V.
  • Open-drain interrupt output for indicating input state changes.
  • Configuration, Input, Output, and Polarity Inversion registers.
  • High-current drive capability for directly driving LEDs.
  • Low current consumption.
  • Hardware address pins (A0, A1, A2) for programming and varying the fixed I2C address, allowing up to eight devices on the same I2C/SMBus.
  • Power-on reset feature to initialize the device to its default state.

Applications

  • Personal computers and personal electronics (e.g., gaming consoles).
  • Industrial automation.
  • Telecom switching equipment and routers.
  • Products with GPIO-limited processors.
  • General-purpose remote I/O expansion for various microcontroller families).

Q & A

  1. What is the operating voltage range of the PCA9554DBR?

    The PCA9554DBR operates within a voltage range of 2.3V to 5.5V).

  2. What is the purpose of the interrupt output on the PCA9554DBR?

    The interrupt output is used to indicate to the system master that an input state has changed).

  3. How many PCA9554DBR devices can be connected on the same I2C/SMBus?

    Up to eight PCA9554DBR devices can be connected on the same I2C/SMBus using the hardware address pins (A0, A1, A2)).

  4. What is the maximum continuous output low current of the PCA9554DBR?

    The maximum continuous output low current is 50 mA).

  5. Can the PCA9554DBR be reset to its default state?
  6. Is the PCA9554DBR compatible with other Texas Instruments devices?

    The PCA9554DBR is pin-to-pin and I2C address compatible with the PCF8574, although software changes may be necessary).

  7. What is the storage temperature range for the PCA9554DBR?

    The storage temperature range is -65°C to 150°C).

  8. Does the PCA9554DBR support both standard and fast I2C modes?
  9. What is the purpose of the configuration registers in the PCA9554DBR?

    The configuration registers allow the system master to configure the I/Os as either inputs or outputs and to set the polarity of the input port register).

  10. Can the PCA9554DBR drive LEDs directly?

Product Attributes

Number of I/O:8
Interface:I²C, SMBus
Interrupt Output:Yes
Features:POR
Output Type:Push-Pull
Current - Output Source/Sink:10mA, 25mA
Clock Frequency:400 kHz
Voltage - Supply:2.3V ~ 5.5V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:16-SSOP (0.209", 5.30mm Width)
Supplier Device Package:16-SSOP
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Similar Products

Part Number PCA9554DBR PCA9557DBR PCA9555DBR PCA9554DWR PCA9554ADBR PCA9554DB
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active Active Active
Number of I/O 8 8 16 8 8 8
Interface I²C, SMBus I²C, SMBus I²C, SMBus I²C, SMBus I²C, SMBus I²C, SMBus
Interrupt Output Yes No Yes Yes Yes Yes
Features POR POR POR POR POR POR
Output Type Push-Pull Open Drain, Push-Pull Push-Pull Push-Pull Push-Pull Push-Pull
Current - Output Source/Sink 10mA, 25mA 10mA, 25mA 10mA, 25mA 10mA, 25mA 10mA, 25mA 10mA, 25mA
Clock Frequency 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz 400 kHz
Voltage - Supply 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V 2.3V ~ 5.5V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 16-SSOP (0.209", 5.30mm Width) 16-SSOP (0.209", 5.30mm Width) 24-SSOP (0.209", 5.30mm Width) 16-SOIC (0.295", 7.50mm Width) 16-SSOP (0.209", 5.30mm Width) 16-SSOP (0.209", 5.30mm Width)
Supplier Device Package 16-SSOP 16-SSOP 24-SSOP 16-SOIC 16-SSOP 16-SSOP

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