PCA9511AD,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9511AD,118 is a hot swappable I2C-bus and SMBus buffer manufactured by NXP Semiconductors. It allows I/O card insertion into live backplanes without corrupting data or clock buses. The device features bidirectional buffering for SDA and SCL lines, built-in ΔV/Δt rise time accelerators with a 0.6 V threshold, and a digital ENABLE input. It operates within a power supply voltage range of 2.7 V to 5.5 V and supports clock frequencies from 0 Hz to 400 kHz. The component is housed in an SO8 plastic small outline package (SOT96-1) and functions across an operating temperature range of -40 °C to +85 °C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering isolates backplane and card capacitances during live board insertion and removal.
• Built-in ΔV/Δt rise time accelerator circuitry on all SDA and SCL lines requires bus pull-up voltage and supply voltage (VCC) to be the same.
• Includes a digital ENABLE input pin that forces low current mode when LOW and an open-drain READY output indicating connection status.

Signal Buffers, Repeaters, Splitters Applications

• Insertion and removal of cPCI cards from an operating system.
• Insertion and removal of VME cards from an operating system.
• Insertion and removal of AdvancedTCA cards from an operating system.

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering suffix ',118' corresponds to the SO8 package variant as specified in the datasheet. Confirm the manufacturer is NXP Semiconductors. Ensure the part number matches PCA9511AD exactly to distinguish it from the TSSOP8 version. Check for RoHS compliance documentation if required for specific regulatory standards.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems requiring hot swapping capabilities for I2C or SMBus interfaces. Ensure the bus pull-up voltage matches the supply voltage (VCC) due to the rise time accelerator requirements. Verify that the system capacitance and pull-up resistor values fall within the recommended ranges provided in the application design-in information to maintain signal integrity.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9511A belongs to a family of hot swappable bus buffers developed by NXP Semiconductors. This series includes variants such as the PCA9510A, PCA9512A, PCA9513A, and PCA9514A, which offer different feature sets like hardware disable pins or level translation support. The PCA9511AD specifically provides standard buffering with integrated rise time acceleration in an SO8 package.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9511ADP,118 serves as a direct functional substitute but utilizes a TSSOP8 package instead of the SO8 package. Other family members like the PCA9510A lack rise time accelerators, while the PCA9512A offers additional features such as hardware disable and dual VCC pins. Verify package compatibility before substitution.