PCA9507D,112

Signal Buffers, Repeaters, Splitters Overview

The PCA9507D,112 is a bidirectional I2C-bus extender and level shifter manufactured by NXP USA Inc. It provides voltage translation between 2.7 V and 5.5 V rails while supporting bus extension up to 18 meters for HDMI DDC applications. The device features two channels with distinct driver characteristics: Port A includes a rise time accelerator for driving heavy capacitive loads (up to 1400 pF), whereas Port B utilizes static level offset drivers. It supports Standard-mode and Fast-mode I2C-bus devices at clock frequencies up to 400 kHz. The component operates within an ambient temperature range of -40°C to +85°C and is housed in an SOIC-8 package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering and voltage level translation between 2.7 V and 5.5 V supply rails.
• Integrates a rise time accelerator on Port A to drive long cables or high capacitance loads up to 1400 pF.
• Features static level offset drivers on Port B to prevent lock-up conditions when cascaded.
• Supports arbitration and clock stretching across the repeater for reliable multi-master operation.

Signal Buffers, Repeaters, Splitters Applications

• HDMI Display Data Channel (DDC) line extension
• I2C-bus and SMBus signal buffering
• Voltage level shifting between 3.3 V and 5 V systems

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix '112' against the manufacturer's current documentation to confirm the exact tape-and-reel packaging configuration. Confirm RoHS compliance status and check for any product change notifications regarding the SOIC-8 package variant before finalizing procurement orders.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when system design requires extending I2C bus distance beyond standard limits or isolating high capacitance loads. Ensure the application does not require connecting Port B outputs directly to other buffers featuring rise time accelerators due to the static level offset design. Verify that the required pull-up resistor values comply with the specified HDMI DDC specifications for the target port.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9507 family of 2-wire serial bus extenders designed specifically for HDMI DDC applications. It serves as an upgrade replacement for the PCA9517 in cable applications, offering enhanced performance through its integrated rise time accelerator on Port A and robust isolation capabilities for digital video interfaces.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The datasheet identifies the PCA9507 as an upgrade replacement over the PCA9517 for cable applications. Designers should verify that the static level offset behavior on Port B is compatible with the downstream circuitry, as it differs from dynamic offset buffers like the PCA9516A or PCA9518.

Signal Buffers, Repeaters, Splitters FAQ

Can multiple PCA9507 devices be connected in series?

Yes, multiple PCA9507s can be connected in series by linking Port A to Port B. This configuration allows for extended bus distances without build-up in offset voltage, limited only by repeater delay and time-of-flight considerations.

What is the maximum bus capacitance supported on Port A?

Port A can drive a load capacitance of up to 1400 pF, enabled by the integrated rise time accelerator which boosts the pull-up current during rising edges.

Is it safe to connect Port B to another buffer with a rise time accelerator?

No, the static level offset design of Port B prevents connection to other devices with rise time accelerators, such as the PCA9510, PCA9515, or PCA9518, to avoid operational conflicts.