PCA9554PWRG4

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9554PWRG4 is a 8-bit I2C and SMBus I/O expander designed for applications that require additional I/O pins. It provides remote I/O expansion for most microcontroller families via the I2C bus interface.

Characteristics: - 8-bit I/O expander with interrupt output - Low standby current consumption of 1 µA - Supports hot insertion - 5 V tolerant I/Os - Operating voltage range: 2.3 V to 5.5 V - Schmitt trigger inputs for noise suppression - Open-drain active-low interrupt output - ESD protection exceeds JESD 22, 2000-V human-body model (A114-A) - Available in TSSOP package

Package: TSSOP (Thin Shrink Small Outline Package)

Essence: The PCA9554PWRG4 is an integrated circuit that expands the number of input/output pins available to a microcontroller through the I2C bus interface. It offers a cost-effective solution for applications requiring additional I/O pins.

Packaging/Quantity: The PCA9554PWRG4 is typically sold in reels of 2500 units per reel.

Specifications

• Supply Voltage Range: 2.3 V to 5.5 V
• Input/Output Voltage Range: 0 V to VDD
• Maximum Output Current: ±10 mA
• Standby Current: 1 µA (maximum)
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Frequency: 100 kHz, 400 kHz, or 1 MHz

Pin Configuration

The PCA9554PWRG4 has a total of 16 pins, which are assigned as follows:

1. A0: Address Input
2. A1: Address Input
3. A2: Address Input
4. INT: Interrupt Output
5. SDA: I2C Serial Data
6. SCL: I2C Serial Clock
7. P0: General Purpose I/O Pin 0
8. P1: General Purpose I/O Pin 1
9. P2: General Purpose I/O Pin 2
10. P3: General Purpose I/O Pin 3
11. P4: General Purpose I/O Pin 4
12. P5: General Purpose I/O Pin 5
13. P6: General Purpose I/O Pin 6
14. P7: General Purpose I/O Pin 7
15. GND: Ground
16. VDD: Supply Voltage

Functional Features

• Provides 8 additional I/O pins to the microcontroller
• Supports hot insertion, allowing the device to be connected or disconnected while the system is powered
• Low standby current consumption ensures minimal power usage when not in active operation
• Schmitt trigger inputs help suppress noise and provide a more reliable signal
• Open-drain interrupt output allows for easy integration with other devices
• ESD protection exceeds industry standards, ensuring robustness against electrostatic discharges

Advantages and Disadvantages

Advantages: - Cost-effective solution for expanding I/O capabilities of microcontrollers - Wide operating voltage range allows compatibility with various systems - Low standby current consumption minimizes power usage - Hot insertion support simplifies system maintenance and upgrades - Robust ESD protection enhances reliability

Disadvantages: - Limited to 8 additional I/O pins, may not be sufficient for applications requiring a large number of I/Os - Requires an I2C bus interface, which may add complexity to the system design

Working Principles

The PCA9554PWRG4 operates as an I/O expander by communicating with a microcontroller through the I2C bus interface. The microcontroller sends commands and data to the PCA9554PWRG4, which in turn controls the state (input or output) of its I/O pins. The device can be configured to generate an interrupt signal when certain conditions are met, allowing the microcontroller to respond accordingly.

Detailed Application Field Plans

The PCA9554PWRG4 finds applications in various fields where additional I/O pins are required. Some potential application areas include: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics - Consumer electronics

Alternative Models

1. PCA9534PW: 8-bit I2C-bus and SMBus I/O expander
2. MCP23008-E/SO: 8-bit I/O expander with I2C interface
3. MAX7313AUG+: 16-port I/O expander with serial interface
4. TCA