Overview
The PCA9515AD,118 is a CMOS integrated circuit designed by NXP USA Inc. for use in I2C-bus and SMBus systems. This component is specifically intended to extend the capabilities of I2C-bus systems by buffering both the data (SDA) and clock (SCL) lines. This buffering enables the system to accommodate more devices or longer bus lengths, overcoming the 400 pF capacitance limit of standard I2C-bus systems. The PCA9515AD,118 allows for the isolation of two halves of a bus, enabling the operation of two buses at different voltages (e.g., 5 V and 3.3 V) or frequencies (e.g., 400 kHz and 100 kHz).
Key Specifications
| Parameter | Value |
|---|---|
| Interface Type | I2C/SMBus |
| No of Channels | 2 |
| Clock Frequency-Max | 400 kHz |
| Supply Voltage-Nom | 2.3 V to 3.6 V |
| Supply Current | 5 mA |
| Package Style | SOIC-8 |
| Mounting Method | Surface Mount |
| Operating Temperature | -40°C to 85°C |
| ESD Protection | Exceeds 2000 V HBM, 200 V MM, and 1000 V CDM |
Key Features
- 2-channel, bidirectional buffer
- 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
- Accommodates Standard-mode and Fast-mode I2C-bus devices and multiple masters
- Powered-off high-impedance I2C-bus pins
- Operating supply voltage range of 2.3 V to 3.6 V
- 5.5 V tolerant I2C-bus and enable pins
- 0 Hz to 400 kHz clock frequency
Applications
The PCA9515AD,118 is ideal for applications where the I2C-bus capacitance limit needs to be extended. It can be used in systems that require the isolation of two halves of a bus, allowing for more devices or longer bus lengths. This component is particularly useful in scenarios where different voltage levels or frequencies need to be supported on the same bus, such as in mixed-voltage systems or systems requiring both 400 kHz and 100 kHz operation.
Q & A
- What is the primary function of the PCA9515AD,118?
The PCA9515AD,118 is an I2C-bus repeater designed to extend the I2C-bus by buffering both the data (SDA) and clock (SCL) lines, enabling longer bus lengths and more devices on the bus.
- What is the maximum clock frequency supported by the PCA9515AD,118?
The maximum clock frequency supported is 400 kHz.
- What is the supply voltage range for the PCA9515AD,118?
The supply voltage range is from 2.3 V to 3.6 V.
- Is the PCA9515AD,118 compatible with both I2C and SMBus systems?
Yes, it is compatible with both I2C-bus and SMBus systems.
- Can the PCA9515AD,118 be used in series with other PCA9515A devices?
No, the PCA9515A design does not allow for series configuration with other PCA9515A, PCA9516A, or PCA9518A devices.
- What type of ESD protection does the PCA9515AD,118 offer?
The PCA9515AD,118 offers ESD protection that exceeds 2000 V HBM, 200 V MM, and 1000 V CDM.
- What is the operating temperature range for the PCA9515AD,118?
The operating temperature range is from -40°C to 85°C.
- Does the PCA9515AD,118 support arbitration and clock stretching?
Yes, it supports arbitration and clock stretching across the repeater.
- What package styles are available for the PCA9515AD,118?
The PCA9515AD,118 is available in SOIC-8, TSSOP8 (MSOP8), and HWSON8 packages.
- Can the PCA9515AD,118 operate with multiple masters on the bus?
Yes, it accommodates Standard-mode and Fast-mode I2C-bus devices and multiple masters.
