PCA9514D,112

Signal Buffers, Repeaters, Splitters Overview

The PCA9514D,112 is a hot swappable I2C and SMBus bus buffer manufactured by NXP Semiconductors. It allows I/O card insertion into live backplanes without corrupting data or clock buses. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports clock frequencies up to 400 kHz. It features bidirectional buffering for SDA and SCL lines, increasing fan-out while isolating backplane and card capacitances. The component includes rise time accelerator circuitry with a threshold of 0.8 V to improve noise margin. It provides an active HIGH ENABLE input and an open-drain READY output. ESD protection exceeds 2000 V HBM. The part is available in SO8 and TSSOP8 packages.

Signal Buffers, Repeaters, Splitters Feature Summary

• Hot swappable design prevents bus corruption during live board insertion and removal from multi-point backplane systems
• Bidirectional buffering increases fan-out and isolates backplane capacitance from card capacitance
• Integrated rise time accelerators with a 0.8 V threshold enhance noise margin over previous generations
• Supports clock stretching and multiple master arbitration/synchronization

Signal Buffers, Repeaters, Splitters Applications

• CompactPCI (cPCI) cards requiring hot swapping capabilities
• VME system cards needing safe insertion into operating backplanes
• AdvancedTCA cards utilizing multi-point backplane architectures

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering code PCA9514D,112 against the manufacturer's current product status. Confirm package availability matches the required SO8 or TSSOP8 form factor. Ensure the application environment falls within the specified -40 °C to +85 °C temperature range. Check for any end-of-life notices or obsolescence warnings associated with this specific revision.

Signal Buffers, Repeaters, Splitters Selection Notes

Select the PCA9514D when hot swapping is required but the integrated 92 μA current source found in the PCA9513 is not needed. Ensure the system pull-up resistors are selected to provide a positive slew rate of at least 1.25 V/μs to activate the boost currents. Verify that the bus capacitance meets minimum requirements to prevent oscillations during initial signal integrity verification.

Signal Buffers, Repeaters, Splitters Part Context

This component belongs to the PCA951x family of hot swappable I2C and SMBus buffers. It shares dynamic offset driver designs with the PCA9510 through PCA9514 series, allowing them to be connected in series or parallel. Unlike static offset devices, these parts can interface with the A side of the PCA9517. They are distinct from the PCA9513 specifically by the absence of the internal current source on the SCLIN and SDAIN pins.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9513D serves as a functional alternative if the 92 μA current source for PICMG backplane applications is required. Other family members like the PCA9510D or PCA9511D offer similar buffering but lack the improved 0.8 V rise time accelerator threshold.