Overview
The PCA9518APW,518 is a CMOS integrated circuit manufactured by NXP USA Inc., designed for use in I²C-bus and SMBus systems. This device serves as an expandable 5-channel I²C-bus hub, enabling the extension of the I²C-bus by buffering both the data (SDA) and clock (SCL) lines. This allows for the creation of multiple bus segments with minimal delay, making it ideal for systems requiring multiple master capabilities and high bus capacitance handling.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VDD supply voltage | 3.0 | 3.3 | 3.6 | V | |
| ICCH HIGH-level supply current | VDD = 3.6 V; SDAn = SCLn = VDD | - | 7.5 | 10 | mA |
| ICCL LOW-level supply current | VDD = 3.6 V; one SDA and one SCL = VSS | - | - | 1 | µA |
| Ci input capacitance | VI = 2.3 V or 0 V | - | - | 7 | pF |
| VIH HIGH-level input voltage | EXPxxxn | 0.6VDD | - | 5.5 | V |
| VIL LOW-level input voltage | EXPxxxn | -0.5 | - | 0.4VDD | V |
| VOL LOW-level output voltage | IOL = 12 mA | - | - | 0.5 | V |
| Operating Temperature | -40 | - | 85 | °C | |
| Package | 20-TSSOP (0.173", 4.40mm Width) |
Key Features
- Expandable 5-channel I²C-bus hub, allowing for the extension of the I²C-bus by buffering both the data (SDA) and clock (SCL) lines.
- I²C-bus and SMBus compatible.
- Active HIGH individual repeater enable inputs with internal pull-up resistors.
- Open-drain input/outputs.
- Lock-up free operation.
- Supports multiple master capabilities on each segment.
- Wide voltage range: 2.3 V to 3.6 V.
- Improved partial power-down performance, keeping I²C-bus I/O pins in high-impedance state when VDD is below 2.0 V.
- Expansion pins (EXPSCL1, EXPSCL2, EXPSDA1, EXPSDA2) for connecting multiple PCA9518A devices into a cluster.
Applications
- I²C-bus and SMBus systems requiring bus extension and segmentation.
- Systems needing multiple master capabilities and high bus capacitance handling.
- Industrial and automotive applications where robust and reliable I²C-bus communication is essential.
- Embedded systems, such as those in smart home, smart city, and communication infrastructure.
Q & A
- What is the PCA9518APW,518 used for?
The PCA9518APW,518 is used as an expandable 5-channel I²C-bus hub to extend I²C-bus and SMBus systems by buffering the data and clock lines.
- What is the voltage range of the PCA9518APW,518?
The PCA9518APW,518 operates within a voltage range of 2.3 V to 3.6 V.
- What type of package does the PCA9518APW,518 come in?
The PCA9518APW,518 comes in a 20-TSSOP (0.173", 4.40mm Width) package.
- Can multiple PCA9518A devices be connected in series?
Yes, multiple PCA9518A devices can be grouped into any size cluster using the expansion pins, but they cannot be put in series with PCA9515/16 or other non-clustered PCA9518 devices.
- What is the operating temperature range of the PCA9518APW,518?
The operating temperature range is from -40°C to +85°C.
- Does the PCA9518APW,518 support multiple master capabilities?
Yes, the PCA9518APW,518 supports multiple master capabilities on each segment.
- How does the PCA9518APW,518 handle partial power-down?
The PCA9518APW,518 keeps the I²C-bus I/O pins in a high-impedance state when VDD is below 2.0 V, improving partial power-down performance.
- What are the key features of the enable pins on the PCA9518APW,518?
The enable pins (EN1 through EN4) are active HIGH and have internal pull-up resistors, controlling the associated SDAn and SCLn ports.
- Is the PCA9518APW,518 RoHS compliant?
Yes, the PCA9518APW,518 is RoHS compliant.
- What are some common applications of the PCA9518APW,518?
Common applications include I²C-bus and SMBus systems, industrial and automotive applications, and embedded systems in smart home and smart city infrastructure.
