PCA9510D,112

Signal Buffers, Repeaters, Splitters Overview

The PCA9510D,112 is a hot-swappable I2C and SMBus bus buffer designed for multi-point backplane systems. It isolates card capacitance from the backplane to prevent data corruption during live insertion or removal. The device supports bidirectional buffering for SDA and SCL lines with an operating frequency range of 0 to 400 kHz. It functions within a supply voltage range of 2.7 V to 5.5 V and features 5.5 V tolerant I/Os. Key electrical parameters include a precharge voltage of 1 V on input pins, a rise time accelerator threshold of 0.6 V (PCA9511 only), and ESD protection exceeding 2000 V HBM. The component is available in SO8 and TSSOP8 packages.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bi-directional buffering isolates backplane and card capacitances to prevent bus contention during hot swapping.
• Integrated control circuitry prevents connection until a stop command or bus idle condition occurs.
• Active high ENABLE input allows low current mode activation, while open-drain READY output indicates connection status.

Signal Buffers, Repeaters, Splitters Applications

• cPCI, VME, and AdvancedTCA cards requiring live insertion into operating systems.
• Multi-point backplane systems needing increased fanout for I2C and SMBus standards.
• Applications requiring clock stretching and multiple master arbitration support.

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering code PCA9510D against the specific package requirement, as the D suffix denotes an 8-pin plastic SO package. Confirm the temperature range matches the application needs, as this variant covers -40 to +85 °C. Ensure the system design accounts for the lack of rise time accelerators in the PCA9510 model compared to the PCA9511. Cross-reference the datasheet revision history for any updates to electrical characteristics or pin configurations before finalizing procurement specifications.

Signal Buffers, Repeaters, Splitters Selection Notes

Select the PCA9510D when rise time acceleration is not required or could cause interference in systems with multiple devices. This model lacks the slew rate detectors found in the PCA9511, making it suitable for simpler topologies. Verify that the system pull-up resistors meet the minimum capacitance requirements shown in the datasheet figures. Consider the 1 V precharge feature on the IN side to minimize disturbance during card insertion. Ensure the ENABLE pin logic aligns with the system's power management strategy.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9510D belongs to the Philips Semiconductors PCA951x family of hot-swappable bus buffers. It shares core functionality with the PCA9511 but omits the rise time accelerator circuitry to prevent signal interference in dense multi-device environments. The '112' suffix typically indicates a specific tape and reel packaging configuration, though the datasheet primarily lists the base part numbers PCA9510D and PCA9511D for the SO8 package.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9511D is a functional substitute if rise time acceleration is needed, but may cause interference in some multi-device setups. Other family members like PCA9512, PCA9513, and PCA9514 offer additional features such as hardware disable pins or different precharge options. Verify pin compatibility and electrical characteristics before substituting, as internal circuitry varies across the family.