Overview
The PCA9515AD, produced by NXP USA Inc., is a CMOS integrated circuit designed for use in I2C-bus and SMBus systems. This component is intended to extend the capabilities of the I2C-bus by buffering both the data (SDA) and clock (SCL) lines, thereby enabling the connection of two buses with a total capacitance of 400 pF. This feature allows system designers to isolate two halves of a bus, accommodating more devices or longer bus lengths. The PCA9515AD retains all the operating modes and features of the I2C-bus system, making it versatile for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | NXP USA Inc. |
| 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, TSSOP8 (MSOP8), HWSON8 |
| Mounting Method | Surface Mount |
| Operating Temperature | -40°C to 85°C |
| ESD Protection | Exceeds 2000 V HBM per JESD22-A114, 1000 V CDM per JESD22-C101 |
| Latch-Up Performance | Exceeds 100 mA per JESD 78 |
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 is suitable for various applications where I2C-bus extension is necessary. It can be used to:
- Isolate two halves of a bus, allowing more devices or longer bus lengths.
- Run two buses at different voltage levels (e.g., one at 5 V and the other at 3.3 V) or different frequencies (e.g., 400 kHz and 100 kHz).
- Accommodate Standard-mode and Fast-mode I2C-bus devices and multiple masters.
- Enhance system reliability by providing ESD protection and latch-up performance.
Q & A
- What is the primary function of the PCA9515AD?
The PCA9515AD is a CMOS integrated circuit designed to extend the I2C-bus by buffering both the data (SDA) and clock (SCL) lines, enabling the connection of two buses with a total capacitance of 400 pF.
- What are the supported interface types?
The PCA9515AD supports I2C-bus and SMBus interfaces.
- What is the maximum clock frequency supported by the PCA9515AD?
The maximum clock frequency supported is 400 kHz.
- What is the operating supply voltage range of the PCA9515AD?
The operating supply voltage range is from 2.3 V to 3.6 V.
- What types of packages are available for the PCA9515AD?
The PCA9515AD is available in SOIC-8, TSSOP8 (MSOP8), and HWSON8 packages.
- Does the PCA9515AD support multiple masters on the I2C-bus?
Yes, the PCA9515AD supports Standard-mode and Fast-mode I2C-bus devices and multiple masters.
- What level of ESD protection does the PCA9515AD offer?
The PCA9515AD offers ESD protection that exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
- Can the PCA9515AD be used to isolate buses operating at different voltage levels?
Yes, the PCA9515AD can be used to run two buses at different voltage levels, such as one at 5 V and the other at 3.3 V.
- What is the purpose of the active HIGH repeater enable input?
The active HIGH repeater enable input allows the user to control when the repeater is active, which is useful for isolating parts of the bus or managing different bus frequencies.
- Does the PCA9515AD support clock stretching across the repeater?
Yes, the PCA9515AD supports arbitration and clock stretching across the repeater.
