PCA9511AD,112

Signal Buffers, Repeaters, Splitters Overview

The PCA9511AD,112 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 matches the required package type. The 'AD' designation indicates the SO8 package variant. Confirm the specific suffix provided aligns with the manufacturer's current production status and availability for the requested quantity before finalizing procurement actions.

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 integrated rise time accelerator requirements. Verify that the system capacitance and pull-up resistor values comply with the recommended sizing guidelines to maintain signal integrity.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA95XXA device family, which includes variants like the PCA9510A, PCA9512A, PCA9513A, and PCA9514A. These devices serve as hot swappable buffers for multipoint backplane systems. The PCA9511AD specifically utilizes the SO8 package format, distinguishing it from other family members that may offer different packages or additional features such as hardware disable pins.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Direct replacements within the same family include the PCA9511ADP,112, which offers the same functionality in a TSSOP8 package. Other compatible options depend on specific feature requirements, such as the PCA9510A for disabled rise time accelerators or the PCA9512A for hardware disable capabilities.