Overview
The PCA9512AD,118 is a dual supply level shifting, hot swappable I²C-bus and SMBus buffer produced by NXP USA Inc. This component is designed to facilitate the insertion and removal of I/O cards into a live backplane without corrupting the data and clock buses. It supports level shifting between 3.3 V and 5 V systems, ensuring optimal noise margins for each voltage level. The PCA9512AD is particularly useful in applications requiring reliable and seamless communication between different voltage domains within a system.
Key Specifications
| Specification | Description |
|---|---|
| Package Type | SOP8 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Level Shifting | Between 3.3 V and 5 V systems |
| I²C-bus Compatibility | Standard mode, Fast mode, and SMBus standards |
| Rise Time Accelerator | Circuitry with hardware disable pin |
| Precharge Voltage | 1 V precharge on all SDAn and SCLn pins |
| RoHS Compliance | Yes |
| Minimum Order Quantity | 2500 |
Key Features
- Bidirectional buffering for SDA and SCL lines to increase fan-out and prevent bus corruption during live board insertion and removal.
- Hot swappable, allowing I/O card insertion into a live backplane without data corruption.
- Level shifting between 3.3 V and 5 V systems with improved noise margins.
- Rise time accelerator circuitry with a hardware disable pin for lightly loaded systems.
- 1 V precharge on all SDAn and SCLn pins to minimize current during insertion.
- Compatible with I²C-bus Standard mode, Fast mode, and SMBus standards.
Applications
The PCA9512AD is suitable for various applications, including AdvancedTCA cards and other multipoint backplane systems that require the insertion or removal of cards from an operating system. It is particularly useful in environments where reliable and uninterrupted communication between different voltage domains is crucial, such as in industrial, automotive, and telecommunications systems.
Q & A
- What is the primary function of the PCA9512AD?
The PCA9512AD is a hot swappable I²C-bus and SMBus buffer that allows I/O card insertion into a live backplane without corrupting the data and clock buses. - What voltage levels does the PCA9512AD support?
The PCA9512AD supports supply voltages ranging from 2.7 V to 5.5 V and provides level shifting between 3.3 V and 5 V systems. - Is the PCA9512AD RoHS compliant?
Yes, the PCA9512AD is RoHS compliant. - What is the minimum order quantity for the PCA9512AD?
The minimum order quantity is 2500 units. - What are the key features of the PCA9512AD?
The key features include bidirectional buffering, hot swappable capability, level shifting, rise time accelerator circuitry, and 1 V precharge on all SDAn and SCLn pins. - What applications is the PCA9512AD suitable for?
The PCA9512AD is suitable for AdvancedTCA cards, multipoint backplane systems, and other applications requiring reliable communication between different voltage domains. - Is the PCA9512AD compatible with I²C-bus and SMBus standards?
Yes, it is compatible with I²C-bus Standard mode, Fast mode, and SMBus standards. - How does the rise time accelerator circuitry work?
The rise time accelerator circuitry helps meet rise time requirements even with weaker DC pull-up currents and can be disabled via a hardware pin for lightly loaded systems. - What is the purpose of the 1 V precharge on the SDAn and SCLn pins?
The 1 V precharge minimizes the current required to charge the parasitic capacitance of the chip during insertion. - Can the PCA9512AD be used in series or parallel with other PCA9510A/11A/12A/13A/14A devices?
Yes, the PCA9512AD can be connected to another PCA9510A/11A/12A/13A/14A device in series or in parallel.
