PCA9554BBSHP

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9554BBSHP is a versatile 8-bit I2C-bus I/O expander designed for general-purpose input/output expansion in various electronic applications.

Characteristics: - High-speed I2C-bus interface - 8 programmable I/O pins - Low standby current consumption - Wide operating voltage range - Schmitt-trigger action on all inputs - Noise filter on SCL/SDA inputs - Open-drain interrupt output - ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

Package: The PCA9554BBSHP is available in a compact, surface-mount package.

Essence: This IC serves as an interface between a microcontroller and external devices, providing additional input/output capabilities beyond the limited number of pins available on the microcontroller.

Packaging/Quantity: The PCA9554BBSHP is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage Range: 2.3 V to 5.5 V
• I/O Voltage Range: 1.65 V to VDD
• Maximum Output Current: ±10 mA
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: Up to 400 kHz

Pin Configuration

The PCA9554BBSHP features a 16-pin package with the following pin configuration:

```

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| | | 1 2 3 | | | | 4 5 6 | | | | 7 8 9 | | | | 10 11 12 | |_______________| ```

1. SDA - Serial Data Input/Output
2. SCL - Serial Clock Input
3. INT - Interrupt Output 4-11. P0-P7 - Programmable I/O Pins
4. GND - Ground
5. VDD - Supply Voltage

Functional Features

• I2C-bus interface allows easy integration with microcontrollers and other devices.
• Each I/O pin can be individually configured as an input or output.
• Schmitt-trigger action on inputs provides noise immunity.
• Open-drain interrupt output for efficient event notification.
• Low standby current consumption enables power-efficient operation.

Advantages and Disadvantages

Advantages: - Versatile and flexible I/O expansion solution. - High-speed I2C-bus interface simplifies communication. - Wide operating voltage range accommodates various applications. - ESD protection ensures robustness against electrostatic discharge.

Disadvantages: - Limited number of I/O pins (8) may not suffice for complex systems requiring extensive expansion.

Working Principles

The PCA9554BBSHP operates as an I2C slave device, controlled by a master device such as a microcontroller. The master communicates with the PCA9554BBSHP through the I2C-bus, sending commands to configure the I/O pins as inputs or outputs. The state of each pin can be read or set by the master. The device also generates an interrupt signal when a predefined condition occurs, allowing the master to respond promptly.

Application Field Plans

The PCA9554BBSHP finds applications in various fields, including but not limited to: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics - Consumer electronics

Alternative Models

• PCA9554APW: Similar functionality, different package (TSSOP)
• PCA9554BS: Similar functionality, lower operating temperature range (-40°C to +125°C)
• PCA9554DB: Similar functionality, different package (SOIC)

These alternative models provide similar features and can be used as drop-in replacements for the PCA9554BBSHP in many applications.

In conclusion, the PCA9554BBSHP is a versatile I2C-bus I/O expander that offers flexible input/output expansion capabilities. With its high-speed interface, low power consumption, and robust characteristics, it serves as an essential component in various electronic systems across multiple industries.