Overview
The PCA9514AD,112 is a hot swappable I2C-bus and SMBus bus 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 disrupting the data and clock buses. It ensures smooth operation by isolating the card capacitance from the backplane, preventing bus contention and data corruption during hot swapping.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SO8 (Small Outline Package) | - |
| Number of Leads | 8 | - |
| Lead Pitch | 1.27 mm | mm |
| Package Dimensions | 4.9 mm x 3.9 mm x 1.75 mm | mm |
| Operating Power Supply Voltage | 2.7 V to 5.5 V | V |
| Clock Frequency | 0 Hz to 400 kHz | Hz |
| ESD Protection | 2000 V HBM, 200 V MM, 1000 V CDM | V |
| Latch-up Testing | Exceeds 100 mA (JEDEC Standard JESD78) | mA |
Key Features
- Hot swappable I2C-bus and SMBus bus buffer, allowing I/O card insertion into a live backplane without data corruption.
- Bidirectional buffering to isolate card and backplane capacitances.
- Rise time accelerator circuitry to meet rise time requirements with weaker DC pull-up currents.
- Digital ENABLE input pin to control device activation and low current mode.
- Open-drain READY output pin to indicate connection status between backplane and card.
- Supports clock stretching and multiple master arbitration and synchronization.
Applications
- cPCI, VME, and AdvancedTCA cards.
- Multipoint backplane cards that require insertion or removal from an operating system.
Q & A
- What is the primary function of the PCA9514AD,112?
The PCA9514AD,112 is a hot swappable I2C-bus and SMBus bus buffer designed to allow I/O card insertion into a live backplane without corrupting the data and clock buses.
- What package types are available for the PCA9514AD,112?
The PCA9514AD,112 is available in SO8 (Small Outline Package) and TSSOP8 (also known as MSOP8) packages.
- What is the operating voltage range of the PCA9514AD,112?
The operating power supply voltage range is from 2.7 V to 5.5 V.
- What is the maximum clock frequency supported by the PCA9514AD,112?
The PCA9514AD,112 supports clock frequencies up to 400 kHz.
- Does the PCA9514AD,112 support clock stretching and multiple master arbitration?
Yes, it supports clock stretching and multiple master arbitration and synchronization.
- What is the purpose of the ENABLE and READY pins on the PCA9514AD,112?
The ENABLE pin controls the device's activation and low current mode, while the READY pin indicates whether the backplane and card sides are connected.
- What kind of ESD protection does the PCA9514AD,112 offer?
The PCA9514AD,112 offers ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM.
- What are the typical applications of the PCA9514AD,112?
Typical applications include cPCI, VME, AdvancedTCA cards, and other multipoint backplane cards.
- How does the PCA9514AD,112 handle rise time requirements?
The PCA9514AD,112 uses rise time accelerator circuitry to meet rise time requirements with weaker DC pull-up currents.
- What is the significance of isolating card and backplane capacitances in the PCA9514AD,112?
Isolating the capacitances prevents bus contention and data corruption during hot swapping, ensuring smooth operation).
