Texas Instruments TLK6201EARGTT

Overview

TLK6201EARGTT from Texas Instruments is a 6.25-Gbps multirate cable and PCB equalizer with fixed high-frequency boost (13 dB at 3.125 GHz), four-level output de-emphasis (0/–4/–8/–12 dB), and CML I/Os. It compensates up to 13-dB receive-side loss and 12-dB transmit-side loss on FR4 backplanes or 24-AWG cables, enabling reliable 6.25-Gbps operation over 60 inches of FR4 or 63 feet of cable in PCIe, SAS, and InfiniBand links.

For engineers reviewing the TLK6201EARGTT datasheet, TLK6201EARGTT pinout, TLK6201EARGTT application, or TLK6201EARGTT equivalent, this device delivers deterministic jitter under 12 ps_P-P, input sensitivity down to 40 mV_P-P, ultralow power (54 mA typical), integrated LOS detection, and polarity/swing/de-emphasis control - all in a 3-mm × 3-mm QFN package for high-density serial link designs.

Technical Context

The TLK6201EARGTT implements a fixed-gain, high-speed analog data path comprising three cascaded gain stages, an offset cancellation loop (with COC0/COC1 filter terminals), and a CML output buffer with programmable swing (via SWG) and polarity inversion (via POL). Its equalization is non-adaptive: the 13-dB high-frequency boost is fixed at 3.125 GHz, and de-emphasis levels are selected digitally via DE0/DE1 CMOS inputs.

Loss-of-signal detection uses a fixed threshold comparator on the second gain stage output, asserting LOS when low-frequency input amplitude falls below 40–75 mV_P-P; the LOS output can directly drive DIS to implement hardware squelch. The device operates from a single 3.3-V ±10% supply and is characterized from –40°C to 85°C.

Key Specifications

Pinout & Package

TLK6201EARGTT is housed in a 3-mm × 3-mm, 16-pin VQFN (RGT) package with 0.5-mm pitch and exposed thermal pad (EP). The package requires soldering the EP to PCB ground for thermal and mechanical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed equalizer applications.

Compared with MAX3801ETM+ and DS100BR210SQ/NOPB, TLK6201EARGTT uniquely balances 6.25-Gbps performance, fixed low-latency equalization, integrated LOS/squelch, and ultralow power in a compact QFN - making it optimal for Gen2 serial links where simplicity, predictability, and thermal efficiency are critical.

Availability

TLK6201EARGTT is available at Aetrix Electronics and suitable for PCIe Gen2 backplanes, SAS-2 storage interconnects, and InfiniBand QDR channel extensions requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TLK6201EARGTT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-speed interface solutions, with decades of expertise in signal integrity and serial link ICs.

The TLK6201EARGTT belongs to TI's high-speed equalizer product line, designed specifically for multirate compensation of lossy copper interconnects in enterprise storage, communications, and computing infrastructure.

FAQ

What is the maximum supported data rate for TLK6201EARGTT?

The TLK6201EARGTT supports a maximum data rate of 6.25 Gbps, validated with K28.5 patterns and BER <10⁻¹² over standard FR4 striplines and 24-AWG cables. This rate aligns with PCI Express Gen2, SAS-2, and InfiniBand QDR specifications. Operation at lower rates (e.g., 2.125 Gbps or 4.25 Gbps) is fully supported with maintained jitter and sensitivity performance.

Does TLK6201EARGTT require external configuration or firmware?

No, TLK6201EARGTT is a fully analog, pin-strapped equalizer with no firmware, registers, or serial interface. Configuration is achieved solely through CMOS logic levels applied to DE0, DE1, POL, SWG, and DIS pins. All equalization, de-emphasis, and squelch functions operate autonomously after power-up and pin state stabilization.

How does the loss-of-signal (LOS) detection work in TLK6201EARGTT?

The TLK6201EARGTT monitors low-frequency components of the signal at the second gain stage output and compares them to a fixed internal threshold (40–75 mV_P-P). When input amplitude falls below this level, LOS asserts high. Connecting LOS to DIS creates a self-contained squelch function that disables outputs automatically - eliminating chattering during signal loss events without external logic.

Can TLK6201EARGTT be used with AC-coupled interfaces?

Yes, TLK6201EARGTT is designed for AC-coupled operation. The input and output CML interfaces use on-chip 50-Ω terminations to VCC, and only require external AC-coupling capacitors (C1–C4 in Figure 4). The internal offset cancellation loop handles DC drift, and optional external COC0/COC1 capacitors extend low-frequency response if needed for very low data-rate components.

What thermal considerations apply to TLK6201EARGTT's exposed pad (EP)?

The exposed thermal pad (EP, pin 16) of TLK6201EARGTT must be soldered to a solid PCB ground plane to ensure proper thermal dissipation and mechanical reliability. TI recommends ≥85% solder coverage under the pad and use of thermal vias to inner ground layers. Failure to connect EP results in elevated junction temperature, potentially exceeding the 125°C absolute maximum and degrading jitter or longevity.