TLK4211EARGTR

Specialized Overview

The TLK4211EARGTR is a high-speed limiting equalizer designed for digital links operating at data rates up to 4.25 Gbps. It provides a fixed high-frequency boost of 12 dB at 2.1 GHz and ensures full differential output swing for input signals as low as 200 mVp-p, with an overload capability up to 2000 mVp-p. The device features CML outputs, input offset cancellation, and operates on a single 3.3-V supply. It is housed in a 16-pin QFN package (RGT) and is characterized for temperatures from -40°C to 85°C. This component is currently listed as obsolete by the manufacturer.

Specialized Feature Summary

• Provides fixed high-frequency boost to compensate for signal loss in interconnects
• Includes built-in input offset cancellation circuitry for proper operation with small signals
• Features CMOS-controlled output disable and polarity select functions

Specialized Applications

• High-speed links in communication and data systems
• Backplane interconnect applications
• Rack-to-rack interconnect using CX4 cables

Specialized Procurement Notes

Verify current availability status directly with Texas Instruments or authorized distributors, as this specific part number is marked obsolete. Confirm that the RGT suffix corresponds to the 16-pin QFN package and standard lead finish. Ensure design-in compliance with RoHS requirements if applicable to the target market.

Specialized Selection Notes

Select this component when a fixed gain equalizer is sufficient for the application, as it lacks programmable gain settings. Verify that the 12 dB boost at 2.1 GHz aligns with the attenuation characteristics of the specific FR4 board or cable length used. Ensure the system can accommodate the required 3.3-V power supply and AC-coupled I/O configuration.

Specialized Part Context

The TLK4211EA belongs to a family of cable and PC board equalizers from Texas Instruments. Related variants include the TLK4201EA and the TLK6201EA, which offer similar functionality but may differ in supported data rates or channel configurations. These devices are designed to restore signal integrity in high-speed serial links affected by transmission line losses.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the device is obsolete, alternative solutions must be evaluated based on functional equivalence, such as other TI equalizers or third-party components meeting the 4.25 Gbps specification.