Overview
The PCA9515AD112, produced by NXP USA Inc., is a CMOS integrated circuit designed for use in I²C-bus and SMBus systems. This dual bidirectional I²C bus and SMBus repeater is intended to enhance the reliability and extend the capability of I²C and SMBus systems by isolating two halves of a bus, allowing for more devices or longer trace lengths. It retains all the operating modes and features of the I²C system, making it versatile for various applications.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | SOIC (8) or SON (8) |
| Operating Temperature | -40°C to 85°C |
| Supply Voltage Range | -0.5 V to 7 V |
| I²C Bus Voltage Range | -0.5 V to 7 V |
| Enable Input Voltage Range | -0.5 V to 7 V |
| Continuous Output Current | ±50 mA |
| ESD Protection | 2000-V Human-Body Model (A114-A) |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II |
Key Features
- I²C-Bus and SMBus compatible with an internal pullup, allowing the user to select when the repeater is active
- Mixed-Mode Signal Operation and 5.5-V tolerant I²C I/O and enable input support
- Lockup-Free Operation and powered-off high-impedance I²C pins
- Accommodates Standard Mode and Fast Mode I²C devices and multiple masters
- Buffers both the serial data (SDA) and serial clock (SCL) signals on the I²C bus
Applications
The PCA9515AD112 is suitable for various applications where I²C and SMBus systems need to be extended or isolated. This includes industrial automation, automotive systems, consumer electronics, and any scenario where longer bus lengths or more devices need to be connected. It is particularly useful in systems that require reliable communication between different segments of the I²C or SMBus, such as in embedded systems, IoT devices, and other microcontroller-based projects.
Q & A
- What is the PCA9515AD112 used for? The PCA9515AD112 is used as a dual bidirectional I²C bus and SMBus repeater to isolate and extend I²C and SMBus systems.
- What are the operating temperature ranges for the PCA9515AD112? The operating temperature range is -40°C to 85°C.
- What types of I²C devices does the PCA9515AD112 support? It supports Standard Mode and Fast Mode I²C devices, as well as SMBus devices.
- Does the PCA9515AD112 have ESD protection? Yes, it has ESD protection exceeding 2000-V Human-Body Model (A114-A).
- How does the PCA9515AD112 handle latch-up conditions? It has lockup-free operation and latch-up performance exceeding 100 mA per JESD 78, Class II.
- Can the PCA9515AD112 be used in mixed voltage systems? Yes, it 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 enable input (EN) on the PCA9515AD112? The enable input allows the user to select when the repeater is active, which can be used to isolate a badly behaved slave on power-up reset.
- Does the PCA9515AD112 require pullup resistors? Yes, pullup resistors are required to provide the logic high levels on the buffered bus.
- What are the package options for the PCA9515AD112? It is available in SOIC (8) and SON (8) packages.
- Is the PCA9515AD112 RoHS compliant? Yes, it is RoHS compliant.
