PCA9510AD,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9510AD,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 provides bidirectional buffering for SDA and SCL lines, increasing fan-out while isolating backplane and card capacitances. Operating voltage ranges from 2.7 V to 5.5 V with a supply current of 3.5 mA to 6 mA at 5.5 V. It supports Standard-mode and Fast-mode I2C standards up to 400 kHz. The component features an active HIGH ENABLE input, an open-drain READY output, and high-impedance pins when VCC is 0 V. Input pins are precharged to 1 V during insertion.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering prevents bus corruption during live board insertion and removal
• Active HIGH ENABLE input controls connection state and low current mode
• Open-drain READY output indicates physical connection status between sides
• Input precharge minimizes parasitic capacitance charging current

Signal Buffers, Repeaters, Splitters Applications

• cPCI cards requiring hot swapping capabilities
• VME system peripheral cards
• AdvancedTCA cards in multi-point backplane systems

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering suffix ,118 corresponds to the SO8 plastic small outline package (SOT96-1) as specified in the datasheet. Confirm that the part number matches the PCA9510A family specifications, specifically noting the absence of rise time accelerator circuitry compared to other variants like the PCA9511A. Ensure compatibility with the required operating temperature range of -40 °C to +85 °C.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component for applications requiring isolation between backplane and card capacitances during hot swap events. It is suitable for systems needing dynamic offset design compatibility with other PCA9510/11/12/13/14A devices. Do not use if rise time acceleration is required, as this variant lacks that feature. Verify pull-up resistor values meet the slew rate requirements for the specific bus capacitance.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9510AD,118 belongs to the PCA9510A series of hot swappable bus buffers. It shares functional similarities with the PCA9511A but lacks the rise time accelerator circuitry found in the latter. This distinction makes it appropriate for systems where multiple buffers might cause interference due to acceleration. It is designed to work in series or parallel with other dynamic offset I/O drivers within the same product family.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9510ADP serves as a pin-compatible alternative using the TSSOP8 package. Other family members like the PCA9511A offer similar functionality but include rise time accelerators. Substitution requires verifying package dimensions and ensuring the absence of rise time acceleration meets system noise margin requirements.

Signal Buffers, Repeaters, Splitters FAQ

Does the PCA9510AD include rise time accelerator circuitry?

No, the PCA9510A does not have rise time accelerator circuitry to prevent interference when multiple devices are present in the same system.

How does the ENABLE pin affect the device operation?

An active HIGH ENABLE input activates the device. Grounding this pin forces the device into a low current mode (< 1 μA) and disconnects the backplane side from the card side.

What is the function of the READY output pin?

The READY pin is an open-drain output that goes HIGH when the backplane and card sides are connected together and LOW when they are disconnected or when ENABLE is LOW.