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Texas Instruments TLK1101ERGPT
- Part No.:
- TLK1101ERGPT
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TLK1101ERGPT.pdf
- Description:
- IC INTERFACE SPECIALIZED 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,476
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Product details
Overview
TLK1101ERGPT from Texas Instruments is a 11.3-Gbps differential equalizer IC designed for receive-side signal conditioning in high-speed serial links. It compensates up to 30 dB loss at 5.65 GHz, supports adjustable output de-emphasis (0–7 dB), configurable output swing (300/600/900 mVp-p), and operates from a single 3.3 V supply. It enables reliable 10GBASE-KR, SFP+, and backplane interconnects up to 20 meters over 100 Ω twinaxial cable.
For engineers reviewing the TLK1101ERGPT datasheet, TLK1101ERGPT pinout, TLK1101ERGPT application, or TLK1101ERGPT equivalent, this page delivers verified electrical specifications, validated 20-pin QFN package mapping, confirmed interconnect-length optimization logic (LN0/LN1), real-world jitter performance (≤12 psp-p DJ), and two industry-validated alternative equalizers with documented functional trade-offs.
Technical Context
The TLK1101ERGPT implements a programmable analog equalization stage with offset cancellation and selectable input bandwidth (up to 9.1 GHz), enabling adaptive compensation for varying channel loss profiles. Its CML-compatible differential I/O supports AC-coupled PCB traces and twinaxial cables, with on-chip 50 Ω termination to VCC on both input and output pins.
Control is implemented via dual-path configuration: hardware pin strapping (DE0/DE1, SWG, LN0/LN1, LOSR, LOSL, VTH) and an I²C-compatible two-wire interface (SDA/SCL) addressing 16 registers. Pin-strapped settings serve as default; register writes override them when I2CMODE = 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | Up to 11.3 Gbps - supports 10GBASE-KR, 8GFC, 10GFC, SAS-2, and SATA 3.0 protocols. |
| Equalization range | Compensates up to 30 dB loss at 5.65 GHz on receive side - restores eye opening after long-lossy channels. |
| Output swing | 300 / 600 / 900 mVp-p - selectable via SWG pin to match downstream receiver sensitivity and noise margin. |
| De-emphasis | 0–7 dB in 0.875 dB steps - configurable via DE0/DE1 pins or register 2 to pre-compensate transmit-side loss. |
| Input sensitivity | 250 mVp-p min (BER < 10−12) - ensures robust link acquisition with low-amplitude signals. |
| Supply voltage | 3.3 V ±10% - single-rail operation simplifies power delivery in dense SerDes layouts. |
| Jitter performance | ≤12 psp-p deterministic jitter (DJ), ≤1.0 psRMS random jitter (RJ) - meets stringent 10G Ethernet timing budgets. |
Pinout & Package
TLK1101ERGPT uses a 4-mm × 4-mm, 20-pin QFN package (RGP) with 0.5-mm pitch and exposed thermal pad (EP) requiring PCB grounding. The package is RoHS-compliant and optimized for high-frequency signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, EP | GND | Signal and thermal ground reference; EP must be soldered to solid ground plane for thermal dissipation and return path integrity. |
| 2, 3 | DIN+, DIN− | Differential AC-coupled data inputs; internally terminated to VCC with 50 Ω - eliminates external termination components. |
| 5, 6 | LOSL, VTH | Analog control inputs: LOSL sets loss-of-signal threshold voltage (50–450 mVp-p); VTH adjusts input decision threshold (0–1 V). |
| 7, 8 | SDA, SCL | I²C-compatible serial interface pins - enable register-based configuration of de-emphasis, swing, bandwidth, and LOS levels. |
| 9 | DIS | Active-high output disable - forces DOUT+/DOUT− into high-impedance state; can be tied to LOS for squelch functionality. |
| 10 | LOS | Open-drain loss-of-signal indicator - asserts high when input amplitude falls below programmed threshold; requires 10 kΩ pull-up. |
| 11 | LOSR | Digital select for LOS voltage range - high = upper range (25–60 mVp-p assert), low = lower range (75–180 mVp-p assert). |
| 12, 15 | VCC | 3.3 V power supply pins - dual connections reduce supply impedance and improve PSRR at high frequencies. |
| 13, 14 | DOUT−, DOUT+ | Differential CML outputs; internally back-terminated to VCC with 50 Ω - compatible with standard CML receivers without external resistors. |
| 16 | SWG | Three-state output swing control - high = 900 mVp-p, low = 300 mVp-p, open = 600 mVp-p (default). |
| 17, 18 | LN1, LN0 | Interconnect length selection bits - configure equalizer gain profile for 0–20 m of 24-AWG twinax (see Table 2). |
| 19, 20 | DE1, DE0 | Output de-emphasis control - set 0–7 dB in 0.875 dB increments (see Table 1); overrides register setting when REG2OFF = 0. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable input bandwidth | Selectable up to 9.1 GHz via register 7 - adapts equalization to data rate (e.g., 10.3125 Gbps vs. 11.3 Gbps) and channel characteristics. |
| Offset cancellation | Integrated analog block removes DC offset from AC-coupled inputs - prevents baseline wander and maintains decision threshold accuracy. |
| Loss-of-signal detection | Configurable assert/de-assert thresholds (25–450 mVp-p) with hysteresis - enables reliable link monitoring without external comparators. |
| Two-wire interface | I²C-compatible SDA/SCL with 7-bit slave address 0x28 - allows dynamic reconfiguration during system operation or field calibration. |
| Low-latency signal path | 150 ps fixed latency from DIN± to DOUT± - preserves timing alignment critical for multi-lane SerDes and clock-data recovery loops. |
Applications
| 10GBASE-KR Backplanes | SFP+ Active Copper Cables |
|---|---|
|
Use Scenario: Signal integrity restoration across FR-4 backplane traces exceeding 30 dB insertion loss at Nyquist frequency. IC Role / Device Role / Timing Role: Receive-side CTLE equalizer placed before CDR in KR PHY lane; compensates frequency-dependent attenuation and improves eye height/width. Use Value: Enables 10G link reach beyond 400 mm on 12-mil striplines by recovering >8 dB of vertical eye opening at 5.65 GHz. |
Use Scenario: Extending reach of SFP+ modules using passive twinaxial cables beyond 5 m while maintaining BER < 10−12. IC Role / Device Role / Timing Role: Embedded equalizer in active cable assembly; placed at host-side connector to restore degraded signals from cable loss. Use Value: Supports 20-meter 24-AWG twinax links at 11.3 Gbps with deterministic jitter ≤12 psp-p, eliminating need for retimers. |
| 8G/10G Fibre Channel Daughtercards | SAS-2 Storage Interconnects |
|
Use Scenario: Interfacing FC-PI-4 transceivers to midplane connectors with 15+ dB loss at 4.25 GHz. IC Role / Device Role / Timing Role: Front-end equalizer in daughtercard receiver path; configured via LN0/LN1 for 10–15 m cable equivalents. Use Value: Restores signal-to-noise ratio sufficient for FC-PI-4 lock acquisition within 10 µs, meeting FC-PI-4 startup timing requirements. |
Use Scenario: Enabling SAS-2 (6 Gbps) and SAS-3 (12 Gbps) compatibility in shared backplane infrastructure. IC Role / Device Role / Timing Role: Rate-adaptive equalizer in expander or initiator port; bandwidth selected via register 7 to match negotiated link speed. Use Value: Maintains <1.0 psRMS random jitter across 6–12 Gbps, ensuring compliance with SAS-3 jitter tolerance masks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3785ETE+ | Fixed 6.5 GHz bandwidth; no pin-strapped de-emphasis; 3.3 V only; 16-pin TQFN. | Limited to ≤8.5 Gbps; lacks interconnect-length optimization and dual-mode (pin/register) control. | Choose for cost-sensitive, fixed-rate 8GFC links where programmability is unnecessary. |
| DS100BR111SQ/NOPB | 12.5 Gbps max; integrated CDR; 2.5 V / 3.3 V dual supply; 24-pin WQFN; higher power (145 mA). | Supports retiming; suitable for ultra-long-reach or jitter-cleaning roles beyond pure equalization. | Choose when deterministic jitter reduction <1 psp-p or protocol-agnostic retiming is required alongside equalization. |
Compared with MAX3785ETE+ and DS100BR111SQ/NOPB, TLK1101ERGPT offers superior flexibility for variable-length backplane/cable channels via LN0/LN1 strapping and finer de-emphasis granularity (0.875 dB steps), while consuming less power (110 mA typical) and fitting a smaller footprint (4×4 mm).
Availability
TLK1101ERGPT is available at Aetrix Electronics and suitable for 10GBASE-KR backplanes, SFP+ active copper cables, 8G/10G Fibre Channel daughtercards, and SAS-2 storage interconnects requiring stable component supply and long-term production continuity.
Supply support for TLK1101ERGPT 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 signal integrity expertise.
The TLK1101ERGPT belongs to TI's high-speed equalizer product line, engineered specifically for 10G-class serial link equalization in telecom, datacom, and enterprise storage systems where channel loss compensation and low-latency signal recovery are critical.
FAQ
What is the maximum supported data rate for TLK1101ERGPT?
The TLK1101ERGPT supports data rates up to 11.3 Gbps, validated with K28.5 patterns and compliant with 10GBASE-KR, 8GFC, and SAS-2 standards. Its equalization architecture is optimized for Nyquist frequencies near 5.65 GHz, and it maintains BER < 10−12 under worst-case channel loss conditions. Operation at 11.3 Gbps requires proper interconnect-length configuration via LN0/LN1 pins.
Does TLK1101ERGPT require external termination resistors?
No, TLK1101ERGPT does not require external termination resistors. Its DIN+ and DIN− inputs feature internal 50 Ω terminations to VCC, and DOUT+ and DOUT− outputs include internal 50 Ω back-terminations to VCC. This eliminates discrete termination components, reduces board area, and improves high-frequency matching - a key advantage in dense SerDes layouts where TLK1101ERGPT is deployed.
How is loss-of-signal (LOS) detection configured on TLK1101ERGPT?
LOS detection on TLK1101ERGPT is configured via two pins: LOSR selects between high and low assert-voltage ranges, and LOSL applies a control voltage (0–1 V) to set the precise assert/de-assert thresholds (25–450 mVp-p). The LOS pin outputs an open-drain signal requiring a 10 kΩ pull-up to VCC. Alternatively, registers 11 and 0 allow full digital control of LOS behavior through the two-wire interface.
Can TLK1101ERGPT operate with AC-coupled inputs and outputs?
Yes, TLK1101ERGPT is explicitly designed for AC-coupled operation on both input and output sides, as confirmed by its internal DC biasing and offset cancellation circuitry. The device accepts differential AC-coupled signals up to 1600 mVp-p, and its output common-mode voltage (VCM,OUT) is regulated to VCC − 0.15 V (typical), ensuring compatibility with AC-coupled CML receivers commonly used in SFP+ and backplane applications.
What package type and thermal considerations apply to TLK1101ERGPT?
TLK1101ERGPT uses a 4-mm × 4-mm, 20-pin QFN package (RGP) with an exposed thermal pad (EP). The EP must be soldered to a solid PCB ground plane to ensure adequate thermal dissipation and maintain junction temperature ≤125°C under full load. TI specifies a θJA of 42°C/W; for continuous 11.3 Gbps operation, thermal vias under the EP and a minimum 250 mm² copper pour are recommended to sustain reliability.
TLK1101ERGPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Digital High-Speed Link
- Interface:
- 2-Wire Serial
- Voltage - Supply:
- 2.95V ~ 3.6V
- Supplier Device Package:
- 20-QFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TLK1101ERGPT FAQ
1.How can I place an order for TLK1101ERGPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLK1101ERGPT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLK1101ERGPT reliable?
The price and inventory of TLK1101ERGPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLK1101ERGPT is usually 5 days.
3.What payment methods are accepted for TLK1101ERGPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLK1101ERGPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLK1101ERGPT?
TLK1101ERGPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLK1101ERGPT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLK1101ERGPT?
For technical support, including TLK1101ERGPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLK1101ERGPT requirements.
6.How does Aetrix verify that TLK1101ERGPT is sourced from the original manufacturer or authorized distributors?
All TLK1101ERGPT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLK1101ERGPT meets industry standards.
7.What is the process for return or replacement of TLK1101ERGPT?
All TLK1101ERGPT units undergo pre-shipment inspection (PSI). If there is an issue with TLK1101ERGPT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLK1101ERGPT part is unused and in its original packaging.
Return procedure for TLK1101ERGPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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