Overview
The PCA9516APW,118, produced by NXP USA Inc., is a CMOS integrated circuit designed for use in I2C-bus and SMBus systems. This 5-channel I2C-bus hub is intended to extend the capabilities of I2C-bus systems by buffering both the data (SDAn) and clock (SCLn) lines. This allows for the expansion of the I2C-bus into five segments, each with a capacitance limit of 400 pF, thereby increasing the number of devices and the length of the bus without compromising system performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Supply Voltage Range | 2.3 to 3.6 | V |
| Max Operating Temperature | 85 | °C |
| Min Operating Temperature | -40 | °C |
| Max Power Dissipation | 300 | mW |
| Operating Supply Current | 5 | mA |
| ESD Protection | > 2000 V HBM, 200 V MM, 1000 V CDM | |
| Clock Frequency Range | 0 Hz to 400 kHz | |
| Package Types | SO16, TSSOP16 |
Key Features
- Supports Standard-mode and Fast-mode I2C-bus devices and multiple masters.
- Lock-up free operation and supports arbitration and clock stretching across the repeater.
- Powered-off high-impedance I2C-bus pins.
- 5.5 V tolerant I2C-bus and enable pins.
- Enable pins (EN1 to EN4) with internal pull-up resistors, active HIGH.
- Each enable pin controls its associated SDAn and SCLn ports.
- Bidirectional, open-drain buffers for SDA and SCL lines.
Applications
The PCA9516APW,118 is suitable for various applications where I2C-bus or SMBus systems need to be expanded or segmented. This includes:
- Expanding I2C-bus systems to increase the number of devices and bus length without compromising performance.
- Running different buses at different voltages (e.g., 5 V and 3.3 V) or frequencies (e.g., 400 kHz and 100 kHz).
- Isolating buses to prevent interference or ensure independent operation.
- Implementing in systems requiring low power consumption and high reliability.
Q & A
- What is the primary function of the PCA9516APW,118?
The PCA9516APW,118 is a 5-channel I2C-bus hub designed to extend and segment I2C-bus systems by buffering the data and clock lines.
- What is the operating supply voltage range for the PCA9516APW,118?
The operating supply voltage range is from 2.3 V to 3.6 V.
- What are the maximum and minimum operating temperatures for this component?
The maximum operating temperature is 85°C, and the minimum is -40°C.
- Does the PCA9516APW,118 support multiple I2C-bus frequencies?
Yes, it supports frequencies from 0 Hz to 400 kHz.
- Can the PCA9516APW,118 be used in systems with different voltage levels?
Yes, it can be used to run different buses at different voltages, such as 5 V and 3.3 V.
- What type of ESD protection does the PCA9516APW,118 offer?
The component offers ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM.
- Can multiple PCA9516APW,118 devices be cascaded in series?
No, the design of the PCA9516APW,118 does not allow for cascading multiple devices in series.
- What are the package types available for the PCA9516APW,118?
The component is available in SO16 and TSSOP16 packages.
- How do the enable pins (EN1 to EN4) function?
The enable pins are active HIGH and have internal pull-up resistors. Each pin controls its associated SDAn and SCLn ports.
- What is the purpose of the bidirectional, open-drain buffers in the PCA9516APW,118?
The buffers support the standard low-level-contention arbitration of the I2C-bus and act as non-inverting, open-drain buffers during normal operation.
