PI2EQX5904NJEX

Signal Buffers, Repeaters, Splitters Overview

The PI2EQX5904NJEX is a PCIe 2.0 compliant signal ReDriver manufactured by Diodes Incorporated, designed for high-speed serial data transmission up to 5.0Gbps. It supports four differential lanes or eight channels of CML I/Os within a 100-contact LBGA package. The device operates on a single 1.2V ± 0.05V supply voltage and functions across an industrial temperature range of -40°C to +85°C. Typical power consumption is 660mW. Configuration is managed via pin strapping or an I2C interface with standard 100Kbps rate and 7-bit addressing.

Signal Buffers, Repeaters, Splitters Feature Summary

• Supports adjustable receiver equalization and transmitter de-emphasis to compensate for signal insertion loss
• Features integrated receiver detect logic to automatically configure active channels based on load presence
• Provides flexible loopback, mux/demux, and broadcast modes for system testing and signal routing

Signal Buffers, Repeaters, Splitters Applications

• PCIe 2.0 cable extensions
• Blade server interconnects
• Backplane signal reconditioning

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the component status as End-of-Life (EOL) before procurement planning. Confirm that the specific NJEX suffix corresponds to the required packaging and material specifications. Ensure compatibility with existing PCB layouts due to the 100-contact LBGA footprint. Review the Product Change Notification regarding wafer fab transitions from GlobalFoundry to SMIC for manufacturing compliance.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems requiring PCIe 2.0 signal integrity over extended physical pathways. The choice depends on the need for programmable equalization levels and output swing adjustments. Consider the I2C control capability if dynamic configuration is necessary versus static pin-strapped setups. Verify that the 1.2V supply rail aligns with the platform's power distribution network.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PI2EQX series of low-power ReDrivers from Diodes Incorporated. It is specifically engineered for PCIe 2.0 applications, distinguishing it from higher-speed variants in the PI3EQX family. The device addresses signal attenuation issues common in complex server architectures and storage subsystems.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the End-of-Life status, alternative sourcing requires careful evaluation of form, fit, and function against newer generation devices.

Signal Buffers, Repeaters, Splitters FAQ

How is the device configured between pin control and I2C control?

Configuration mode is determined by the MODE input pin. A high level selects pin control and disables I2C operation, while a low level allows reprogramming of control registers via the I2C interface.

What is the function of the Receiver Detect feature?

Receiver Detect automatically senses the presence of a load device on the output. This allows the PI2EQX5904 to configure itself properly depending on whether it is communicating with a 4-lane, 3-lane, 2-lane, or 1-lane device.

How does the device handle Electrical Idle states?

The PI2EQX5904 fully supports Electrical Idle states. An input level detect function eliminates re-transmission of noise by driving outputs to a high-impedance state if the input signal falls below a specific threshold.