PTN3944EWY

Signal Buffers, Repeaters, Splitters Overview

The PTN3944EWY is a multi-channel PCIe 4.0 linear equalizer optimized for high-speed signal quality enhancement in PCIe and UPI interfaces. It provides programmable linear equalization and output swing linearity control to reduce inter-symbol interference and extend channel reach. The device supports PCIe Gen1 through Gen4 speeds at x4 lane configurations, with peaking gain up to 18.3 dB at 8 GHz. It operates on a 1.8 V supply within a 1.7 V to 1.9 V range and features configurable settings via I2C or pin strapping. The component is housed in an HWFLGA36 package and functions reliably across a temperature range of -20 °C to +85 °C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Supports PCIe Gen1 (2.5 Gbps), Gen2 (5 Gbps), Gen3 (8 Gbps), and Gen4 (16 Gbps) data rates
• Configurable via I2C interface supporting multiple slave addresses or static pin strapping
• Integrated termination resistors provide impedance matching on transmit and receive sides
• Low active current consumption with flow-through pin-out to minimize crosstalk effects

Signal Buffers, Repeaters, Splitters Applications

• Servers
• Data centers
• AI/ML hardware accelerators
• Hub or dock devices
• Edge mobile computing devices

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering part number PTN3944EWY against the manufacturer's official documentation to ensure correct package type and temperature rating. Confirm that the required I2C pull-up resistor values and voltage levels align with system design specifications before procurement. Ensure compliance with RoHS directives if applicable to the target market requirements.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems requiring signal integrity extension for PCIe 4.0 links. Consider the available peaking gain options and output swing linearity settings to match specific channel attenuation characteristics. Evaluate the I2C address configuration capabilities if multiple equalizers are deployed on the same bus to prevent address conflicts.

Signal Buffers, Repeaters, Splitters Part Context

The PTN3944EWY belongs to NXP Semiconductors' portfolio of interface development tools and linear equalizers designed for high-speed serial communication. It complements other NXP interface solutions by addressing signal degradation issues in long PCB traces or complex backplane environments typical in modern server and accelerator architectures.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Verify compatibility with alternative components based on pinout, electrical specifications, and functional requirements rather than direct cross-referencing.

Signal Buffers, Repeaters, Splitters FAQ

How is the I2C slave address determined?

The I2C slave address is determined by the logic states of the ADDR1, ADDR2, ADDR3, and ADDR4 pins during power-on reset, allowing for multiple address combinations.

What is the function of the LCTL pins?

LCTL1, LCTL2, and LCTL3 are ternary inputs used to configure the peaking gain and output linear swing settings for the respective channels, either statically or via I2C registers.

Can unused lanes be powered down?

Yes, the device can be configured via I2C to operate with a selected lane count, thereby saving power consumption on unused lanes.