PCA9527DPZ

Signal Buffers, Repeaters, Splitters Overview

The PCA9527DPZ is a 3-channel bidirectional open-drain bus buffer designed for HDMI Display Data Control (DDC) and Consumer Electronic Control (CEC) applications. It supports voltage level translation between Port A (2.7 V to 5.5 V) and Port B (2.7 V to 3.6 V). The device features rise time accelerators on the SCLA and SDAA ports to drive long cables up to 18 meters or 1400 pF capacitance, while the CEC channel provides static level offset without acceleration. Operating at clock frequencies up to 400 kHz, it isolates bus capacitance to meet HDMI DDC version 1.3 specifications. Packaged in a TSSOP10 format.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering for I2C-bus, SMBus, and DDC signals with dual power supply capability.
• Integrates rise time accelerators on Port A to extend cable length and support heavy capacitive loads.
• Features overvoltage tolerant pins that remain high-impedance when unpowered.
• Supports arbitration, clock stretching, and lock-up free operation across the repeater.

Signal Buffers, Repeaters, Splitters Applications

• HDMI transmitter and receiver systems requiring DDC line extension.
• I2C-bus and SMBus signal buffering between different voltage domains.
• Consumer electronic control (CEC) line interfacing in display devices.

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify component authenticity through authorized NXP distributors. Confirm package marking matches the specified TSSOP10 variant. Check revision status against the latest product data sheet to ensure compatibility with current design requirements.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when HDMI DDC distance specifications exceed standard limits. Ensure Port A operates within 2.7 V to 5.5 V and Port B within 2.7 V to 3.6 V. Verify that the system requires rise time acceleration for long cable runs or high capacitance loads.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9527 series of bus extenders manufactured by NXP Semiconductors. It serves as an upgrade replacement for legacy buffers like the PCA9507 and PCA9517A in cable application scenarios. The DP suffix indicates the TSSOP10 plastic thin shrink small outline package.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Documented drop-in replacements include the PCA9527DP. Verify pinout compatibility and electrical characteristics before substituting other bus buffer models.

Signal Buffers, Repeaters, Splitters FAQ

What is the maximum capacitance load supported on Port A?

Port A can reliably drive up to 1400 pF capacitance using its integrated rise time accelerator.

Does the CEC channel have a rise time accelerator?

No, the CECA channel does not have a rise time accelerator; it functions as a standard open-drain I/O powered by VCC(B).

How should the EN pin be managed during operation?

The EN pin should only change state when the global bus and the buffer port are in an idle state to prevent hanging the bus or confusing enabled parts.