MAX4969CTO+

Signal Buffers, Repeaters, Splitters Overview

The MAX4969CTO+ is a single-lane active multiplexer and redriver designed for PCIe signal chains. It supports data rates up to 5.0GT/s, covering PCIe Gen1 (2.5GT/s) and Gen2 (5.0GT/s). The device operates from a single +3.3V supply with a typical current draw of 150mA at VCC = +3.3V. It features independent programmable input equalization and output deemphasis to improve signal integrity. Electrical characteristics include an input return loss of ≥8dB between 1.25GHz and 2.5GHz. The component is housed in a 42-pin TQFN package measuring 3.5mm x 9.0mm and is specified for commercial operating temperatures ranging from 0°C to +70°C.

Signal Buffers, Repeaters, Splitters Feature Summary

• Supports PCIe Gen1 and Gen2 signal transmission up to 5.0GT/s
• Features independent programmable input equalization and output deemphasis
• Includes on-chip 50Ω input/output terminations
• Provides electrical idle detection and receiver detection capabilities

Signal Buffers, Repeaters, Splitters Applications

• Blade Servers
• Workstations
• Communications Switches
• Test Equipment
• Storage Area Network

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm lead-free status and compliance requirements. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee authenticity. Confirm that the package type matches the required 42-pin TQFN form factor for your design constraints.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing high-speed serial links requiring signal regeneration for PCIe standards. Consider the available input equalization and output deemphasis settings to compensate for trace losses. Evaluate the thermal performance requirements, as the exposed pad must be soldered to the ground plane for optimal heat dissipation within the specified temperature range.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the MAX4969 family of active multiplexers and redrivers manufactured by Maxim Integrated, now part of Analog Devices Inc. The series is engineered to address signal integrity challenges in high-speed digital interfaces. The MAX4969 specifically targets single-lane applications, offering a compact solution for extending reach and maintaining signal quality in dense electronic systems.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure any replacement maintains compatibility with PCIe Gen1/Gen2 signaling speeds and fits the 42-pin TQFN footprint without altering board layout.

Signal Buffers, Repeaters, Splitters FAQ

How does the MAX4969 handle electrical idle states?

The device detects when the differential input falls below the electrical idle threshold and squelches the output to prevent noise redriving. It also supports electrical idle entry and exit delays.

What is the function of the RX_DET pin?

The RX_DET pin initiates receiver detection on each channel. When toggled, it triggers a process to detect if a receiver is present, repeating indefinitely until detection occurs or is stopped.

Can the input equalization be adjusted independently?

Yes, the MAX4969 provides independent programmable input equalization for different channels, allowing adjustments of 0dB, 3.5dB, or 6dB via control pins.