Overview
The PCA9516APW, produced by NXP USA Inc., is a 5-channel I2C-bus hub designed to extend and enhance the capabilities of I2C-bus and SMBus systems. This CMOS integrated circuit allows system designers to divide the bus into five segments, each with its own repeater, thereby reducing the impact of bus capacitance and enabling longer bus lengths and more devices on the bus. It supports both Standard-mode and Fast-mode I2C-bus devices and can operate at different voltage levels (2.3 V to 3.6 V) and frequencies (up to 400 kHz).
Key Specifications
| Parameter | Value |
|---|---|
| Interface Type | I2C/SMBus |
| Number of Channels | 5 |
| Clock Frequency (Max) | 400 kHz |
| Supply Voltage | 2.3 V to 3.6 V |
| Supply Current | 5 mA |
| Input Capacitance | 6 pF |
| Operating Temperature | -40°C to 85°C |
| Package Type | TSSOP-16 |
| Mounting Type | Surface Mount |
| Propagation Delay Time | 150 ns |
| Power Dissipation | 300 mW |
Key Features
- Lock-up free operation and support for arbitration and clock stretching across the repeater.
- Supports Standard-mode and Fast-mode I2C-bus devices and multiple masters.
- Powered-off high-impedance I2C-bus pins.
- ESD protection exceeds 2000 V HBM, 200 V MM, and 1000 V CDM.
- Enable pins (EN1 to EN4) with internal pull-up resistors to control associated SDAn and SCLn ports.
- Ability to run different buses at 5 V and 3.3 V or 400 kHz and 100 kHz, with isolation of the 100 kHz bus during 400 kHz operation.
Applications
- I2C-bus and SMBus systems requiring bus extension and segmentation.
- Hotswap applications where bus capacitance and voltage level differences need to be managed.
- Systems needing to support multiple masters and different bus frequencies).
Q & A
- What is the primary function of the PCA9516APW?
The PCA9516APW is a 5-channel I2C-bus hub designed to extend and enhance I2C-bus and SMBus systems by buffering both the data and clock lines.
- What is the maximum clock frequency supported by the PCA9516APW?
The PCA9516APW supports clock frequencies up to 400 kHz.
- What is the operating supply voltage range of the PCA9516APW?
The operating supply voltage range is from 2.3 V to 3.6 V.
- How many channels does the PCA9516APW support?
The PCA9516APW supports 5 channels.
- What type of package is the PCA9516APW available in?
The PCA9516APW is available in a TSSOP-16 package.
- Can the PCA9516APW be used in series with other PCA9516A devices?
No, two or more PCA9516As cannot be put in series due to design limitations.
- What is the propagation delay time of the PCA9516APW?
The propagation delay time is 150 ns.
- What is the input capacitance of the PCA9516APW?
The input capacitance is 6 pF.
- Does the PCA9516APW support hotswap applications?
- What is the operating temperature range of the PCA9516APW?
The operating temperature range is from -40°C to 85°C.
