Overview
The PCA9518PW,112, produced by NXP USA Inc., is a specialized integrated circuit designed to enhance and expand the capabilities of I2C-bus and SMBus systems. This BiCMOS device serves as an expandable 5-channel I2C-bus hub, allowing for the extension of the I2C-bus by buffering both the data (SDA) and clock (SCL) lines. This feature enables the system designer to divide the bus into multiple segments, each with a maximum capacitance of 400 pF, thereby overcoming the traditional capacitance limits of I2C-bus systems.
Key Specifications
| Parameter | Description |
|---|---|
| Part Number | PCA9518PW,112 |
| Category | Interface - Specialized |
| Manufacturer | NXP USA Inc. |
| Description | IC INTERFACE SPECIALIZED 20TSSOP |
| Package | Tube |
| Interface | I²C, SMBus |
| Voltage - Supply | 3V ~ 3.6V |
| Mounting Type | Surface Mount |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Applications | Buffer |
Key Features
- Expandable 5-channel I2C-bus hub: Allows for the extension of the I2C-bus by buffering both the data (SDA) and clock (SCL) lines.
- I2C-bus and SMBus compatible: Supports standard-mode and fast-mode I2C devices as well as SMBus devices.
- Active-High Individual Repeater Enable Inputs: Enables individual control over each repeater channel.
- Open-Drain Input/Outputs: Ensures compatibility with various bus configurations.
- Lock-up Free Operation: Prevents lock-up conditions in multi-master environments.
- Supports Arbitration and Clock Stretching: Facilitates smooth operation in complex bus systems.
- 5-V Tolerant I2C and Enable Input Pins: Supports mixed-mode signal operation and does not require additional circuitry for voltage translation.
- ESD Protection: Exceeds JESD 22 standards for human-body, machine, and charged-device models.
Applications
The PCA9518PW,112 is widely used in various electronic systems where I2C-bus and SMBus communication is required. It is particularly useful in applications that need to extend the I2C-bus beyond the traditional capacitance limits, such as:
- Industrial Automation: For controlling and monitoring multiple devices over extended bus lengths.
- Consumer Electronics: In devices that require multiple I2C-bus segments, such as in smart home systems or multimedia devices.
- Automotive Systems: For reliable communication between various modules in a vehicle.
- Medical Devices: Where precise and reliable communication between different components is crucial.
Q & A
- What is the primary function of the PCA9518PW,112?
The PCA9518PW,112 is an expandable 5-channel I2C-bus hub designed to buffer and extend the I2C-bus and SMBus systems.
- What is the voltage supply range for the PCA9518PW,112?
The voltage supply range for the PCA9518PW,112 is 3V to 3.6V.
- What type of package does the PCA9518PW,112 come in?
The PCA9518PW,112 comes in a 20-TSSOP package with a width of 0.173 inches (4.40 mm).
- Is the PCA9518PW,112 compatible with both I2C and SMBus?
- What is the maximum capacitance allowed per segment of the I2C-bus when using the PCA9518PW,112?
The maximum capacitance allowed per segment is 400 pF.
- Does the PCA9518PW,112 support multiple masters on the I2C-bus?
- How does the PCA9518PW,112 handle lock-up conditions?
The PCA9518PW,112 is designed to operate lock-up free, preventing lock-up conditions in multi-master environments.
- What kind of ESD protection does the PCA9518PW,112 offer?
The PCA9518PW,112 offers ESD protection that exceeds JESD 22 standards for human-body, machine, and charged-device models.
- Can the PCA9518PW,112 be used in mixed-voltage systems?
- How can multiple PCA9518PW,112 devices be connected to form a larger hub?
