Overview
The PCA9517ADP/DG,118, produced by NXP USA Inc., is a CMOS integrated circuit designed as a level translating I2C-bus repeater. This component is essential for systems requiring voltage level translation and bus extension in I2C and SMBus applications. It supports voltage translation between low voltage (as low as 0.9 V) and higher voltage (2.7 V to 5.5 V) environments, ensuring seamless communication across different voltage domains without degrading system performance.
Key Specifications
| Parameter | Description |
|---|---|
| Voltage Range | 0.9 V to 5.5 V |
| Package Type | 8-Pin TSSOP (Thin Shrink Small Outline Package) |
| Operating Temperature | -40°C to +85°C |
| Bus Capacitance | Up to 400 pF on either side of the device |
| Input/Output Type | Open-drain input/outputs |
| Overvoltage Tolerance | Up to 5.5 V on SDA and SCL pins even when unpowered |
| Enable Pin | Active HIGH repeater enable input |
Key Features
- Bidirectional buffering for both data (SDA) and clock (SCL) lines, enabling bus extension and capacitance isolation.
- Voltage level translation between low voltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I2C-bus or SMBus applications.
- Footprint and functional replacement for PCA9515/15A.
- I2C-bus and SMBus compatible.
- Active HIGH repeater enable input.
- Open-drain input/outputs.
- Lock-up free operation.
- Supports arbitration and clock stretching across the repeater.
Applications
- I2C-bus and SMBus systems requiring voltage level translation.
- Systems needing bus extension and capacitance isolation.
- Embedded systems, industrial control, and automotive applications where multiple voltage domains are present.
- Any application requiring reliable and robust I2C-bus communication across different voltage levels.
Q & A
- What is the primary function of the PCA9517ADP/DG,118?
The primary function is to provide level shifting and bidirectional buffering for I2C-bus and SMBus applications, allowing voltage translation and bus extension.
- What is the voltage range supported by the PCA9517ADP/DG,118?
The component supports voltage translation between 0.9 V and 5.5 V.
- What type of package does the PCA9517ADP/DG,118 come in?
The component is available in an 8-Pin TSSOP package.
- What is the maximum bus capacitance supported by the PCA9517ADP/DG,118?
The component can handle up to 400 pF on either side of the device.
- Is the PCA9517ADP/DG,118 compatible with both I2C-bus and SMBus?
Yes, it is compatible with both I2C-bus and SMBus standards.
- How do you enable or disable the repeater function on the PCA9517ADP/DG,118?
The repeater function can be enabled or disabled using the active HIGH repeater enable input (EN pin).
- What is the operating temperature range of the PCA9517ADP/DG,118?
The operating temperature range is -40°C to +85°C.
- Are the inputs and outputs of the PCA9517ADP/DG,118 overvoltage tolerant?
Yes, the SDA and SCL pins are overvoltage tolerant up to 5.5 V even when the device is unpowered.
- Can multiple PCA9517ADP/DG,118 devices be connected in series?
Yes, multiple devices can be connected in series without any build-up in offset voltage, only considering time of flight delays.
- What is the significance of the exposed pad in the PCA9517ADP/DG,118 package?
The exposed pad must be soldered to the board for enhanced thermal, electrical, and board-level performance.
