PCA9527DP,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9527DP,118 is a 3-channel bidirectional open-drain bus buffer designed for HDMI Display Data Control (DDC), I2C-bus, and SMBus applications. It provides 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 support cable lengths up to 18 meters or 1400 pF capacitance. It supports clock frequencies from 0 Hz to 400 kHz and includes an active HIGH enable input. The component operates within an ambient temperature range of -40 °C to +85 °C and is housed in a TSSOP10 package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering with voltage level translation capabilities between dual power supply rails.
• Integrates rise time accelerators on specific channels to extend cable distance and drive heavy capacitive loads.
• Supports arbitration and clock stretching across the repeater while maintaining I2C-bus compatibility.

Signal Buffers, Repeaters, Splitters Applications

• HDMI DDC line extension for digital video players and set-top boxes
• I2C-bus and SMBus signal buffering and isolation
• Consumer Electronic Control (CEC) channel interfacing

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix against current NXP documentation to confirm packaging details. The datasheet indicates that the standard packing method utilizes a Static Shielding Bag solution. Ensure the component version matches the required system specifications before procurement.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when HDMI DDC distance specifications require isolation beyond standard limits. It serves as an upgrade replacement for older buffers like the PCA9507 and PCA9517A in cable applications. Verify that the target system voltage requirements align with the specified Port A and Port B operating ranges.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9527 series of bus extenders manufactured by NXP Semiconductors. It is specifically engineered to handle the electrical requirements of HDMI interfaces and general-purpose I2C systems. The DP variant denotes the TSSOP10 plastic thin shrink small outline package configuration.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9527DPZ is documented as a drop-in replacement for the PCA9527DP according to PCN202104008A. This substitution involves a change in the packing method to a Static Shielding Bag solution.

Signal Buffers, Repeaters, Splitters FAQ

Does the CEC channel have a rise time accelerator?

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

What is the maximum allowable capacitance load for Port A?

Port A can reliably drive a load of up to 1400 pF without violating the bus rise time specification.

Can multiple PCA9527 devices be connected in series?

Yes, multiple PCA9527s can be connected in series by connecting Port A to Port B, provided that time-of-flight delays are considered.