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Texas Instruments TLK1101ERGPR
- Part No.:
- TLK1101ERGPR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
TLK1101ERGPR.pdf
- Description:
- IC INTERFACE SPECIALIZED 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,243
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Product details
Overview
TLK1101ERGPR from Texas Instruments is a 11.3-Gbps differential equalizer IC for high-speed serial links, featuring adjustable output de-emphasis (0–7 dB), programmable output swing (300/600/900 mVp-p), and loss-of-signal detection. It compensates up to 30 dB channel loss at 5.65 GHz and supports 10GBASE-KR, 8G/10G Fibre Channel, and SAS-2 backplane interconnects.
For engineers reviewing the TLK1101ERGPR datasheet, TLK1101ERGPR pinout, TLK1101ERGPR application, or TLK1101ERGPR equivalent, key selection criteria include its CML I/O interface, 20-pin QFN package with exposed thermal pad, dual control modes (pin-strapped and I²C), and support for 24-AWG twinaxial cable up to 20 meters.
Technical Context
The TLK1101ERGPR implements a continuous-time linear equalizer (CTLE) architecture with selectable input bandwidth (up to 9.1 GHz) and analog offset cancellation. Its equalization stage operates on AC-coupled differential inputs and delivers CML-compatible outputs with on-chip 50 Ω back-termination to VCC.
Control is implemented via two independent paths: hardware pin configuration (DE0/DE1, SWG, LN0/LN1, LOSR, LOSL, VTH) and an I²C-compatible two-wire interface (SDA/SCL) supporting register address 0x00–0x0F. Pin-strapped settings serve as default; I²C mode is enabled by setting register 0 bit 0 (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 protocols. |
| Equalization Range | Compensates up to 30 dB loss at 5.65 GHz on receive side - enables reliable link budget closure over long backplanes or cables. |
| Output Swing | Selectable 300 / 600 / 900 mVp-p - matches receiver sensitivity and minimizes EMI in multi-drop topologies. |
| De-emphasis | 0–7 dB in 0.875-dB steps - mitigates intersymbol interference (ISI) in frequency-dependent channels. |
| Input Sensitivity | 250 mVp-p min (BER < 10−12) - robust operation with low-amplitude signals from legacy transmitters. |
| Supply Voltage | 3.3 V ±10% - compatible with standard logic rails and eliminates need for dedicated LDOs. |
| Power Consumption | 76–120 mA - scales with output swing setting; optimized for low-power 10G+ systems. |
Pinout & Package
TLK1101ERGPR uses a 4-mm × 4-mm, 20-pin QFN package (RGP) with 0.5-mm pitch and exposed thermal pad (EP) requiring PCB ground connection for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, EP | GND | Ground reference for analog/digital circuits and thermal dissipation path. |
| 2, 3 | DIN+, DIN− | Differential CML input pair with internal 50 Ω termination to VCC; AC-coupled operation required. |
| 13, 14 | DOUT−, DOUT+ | Differential CML output pair with internal 50 Ω back-termination to VCC; no external termination needed. |
| 7, 8 | SDA, SCL | I²C bidirectional data/clock interface - open-drain with external pull-up; enables dynamic configuration without reset. |
| 16 | SWG | Three-state output swing control - sets 300/600/900 mVp-p swing; open = medium (600 mVp-p). |
| 19, 20 | DE0, DE1 | Two-bit de-emphasis control - selects 0–7 dB in 0.875-dB increments per Table 1. |
| 17, 18 | LN0, LN1 | Interconnect length tuning - configures CTLE response for 0–20 m of 24-AWG twinax (Table 2). |
| 5 | LOSL | Analog input for LOS assert threshold - voltage-controlled level (75–450 mVp-p) with hysteresis. |
| 6 | VTH | Analog input for input threshold adjustment - 0–1 V sets differential decision point; open = 0 V default. |
| 9 | DIS | Digital disable input - active-high disables CML output stage; enables squelch when tied to LOS. |
| 10 | LOS | Open-drain digital output - indicates signal loss; requires 10 kΩ pull-up to VCC. |
| 11 | LOSR | Digital LOS range select - high = upper threshold range (25–60 mVp-p), low = lower range (75–180 mVp-p). |
| 12, 15 | VCC | 3.3 V supply - powers analog core, I/O buffers, and bias circuitry; decoupling near pins required. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-rate CTLE equalization | Supports 10.3125 Gbps and 11.3 Gbps protocols with adaptive bandwidth selection via register or pins. |
| Programmable de-emphasis | 0–7 dB in precise 0.875-dB steps - enables fine-tuned channel loss compensation without over-equalization. |
| Dynamic LOS detection | Adjustable assert/de-assert thresholds (25–450 mVp-p) with 2.5–4.5 dB hysteresis - prevents false triggering on marginal signals. |
| Low-jitter signal regeneration | 12 psp-p deterministic jitter and 1.0 psRMS random jitter at 11.3 Gbps - preserves signal integrity for BER < 10−12. |
| Flexible control interface | Hardware pin-strapping (default) + I²C (address 0x50) - allows factory-set operation or runtime reconfiguration. |
| High input dynamic range | Accepts 250–1600 mVp-p differential input - accommodates both low-swing transmitters and overdriven legacy sources. |
Applications
| 10GBASE-KR Backplane Interconnect | SAS-2 Active Cable Assembly |
|---|---|
Use Scenario: High-density switch fabric using FR-4 backplanes with 15-inch striplines and impedance discontinuities. IC Role / Device Role / Timing Role: Receive-side CTLE equalizer restoring signal amplitude and eye opening before CDR sampling. Use Value: Enables 11.3 Gbps operation over 36-inch 12-mil stripline with >30 dB insertion loss at 5.65 GHz. | Use Scenario: 2-meter active twinaxial cable for enterprise storage enclosures with SAS-2 host-to-expander links. IC Role / Device Role / Timing Role: Bidirectional equalizer integrated into SFF-8470-compliant cable assembly, compensating both ends. Use Value: Extends reach beyond passive cable limits while maintaining <10−12 BER at 6 Gbps SAS-2 data rate. |
| 8G/10G Fibre Channel Daughtercard | 10G Ethernet SFP+ Module |
Use Scenario: Optical module daughtercard interfacing with main board via 10 cm edge-card connector and 24-AWG traces. IC Role / Device Role / Timing Role: Front-end equalizer on receiver path, correcting frequency-dependent loss from connector and trace discontinuities. Use Value: Restores 10GFC eye height to >60% UI with 250 mVp-p input sensitivity, eliminating need for retiming. | Use Scenario: SFP+ pluggable transceiver housing 10GBASE-SR optics and digital diagnostics (DDM). IC Role / Device Role / Timing Role: Signal conditioner between host SERDES and laser driver, enabling compliance with SFF-8472 MSA. Use Value: Provides programmable de-emphasis and LOS monitoring required for SFP+ host interface specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS100DF410 | Quad-channel 10.3–12.5 Gbps retimer with integrated CDR; consumes ~2× more power (220 mA/channel). | Requires clock recovery and full retiming; not suitable for simple equalization-only use cases. | Choose DS100DF410 only if CDR functionality and multi-lane consolidation are required. |
| MAX3785 | Single-channel 3.2 Gbps equalizer; max data rate limited to 3.2 Gbps; no I²C interface or de-emphasis. | Targeted at Gigabit Ethernet and CPRI; lacks support for 10G+ protocols and modern control features. | Use MAX3785 only for cost-sensitive sub-4Gbps designs where advanced configurability is unnecessary. |
Compared with DS100DF410 and MAX3785, TLK1101ERGPR provides optimal trade-off of 11.3 Gbps equalization, low power (≤120 mA), pin/I²C configurability, and compact 4-mm QFN footprint - making it ideal for space-constrained, protocol-flexible 10G backplane and cable applications without CDR overhead.
Availability
TLK1101ERGPR is available at Aetrix Electronics and suitable for 10GBASE-KR backplanes, SAS-2 active cables, 8G/10G Fibre Channel daughtercards, and SFP+ modules requiring stable component supply across industrial temperature ranges (–40°C to +100°C).
Supply support for TLK1101ERGPR 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 broad industrial and communications portfolio coverage.
The TLK1101ERGPR belongs to TI's high-speed signal conditioning product line, designed specifically for 10G+ serial link equalization in telecom infrastructure, enterprise storage, and data center interconnects.
FAQ
What is the maximum supported data rate for TLK1101ERGPR?
The TLK1101ERGPR supports a maximum data rate of 11.3 Gbps, validated with K28.5 patterns over 15-meter 24-AWG twinaxial cable and 36-inch FR-4 stripline. It also operates reliably at 10.3125 Gbps for 10GBASE-R and 10GFC applications. The device's CTLE bandwidth and de-emphasis range are optimized for this speed class, and its latency is specified at 150 ps from DIN+/DIN– to DOUT+/DOUT–.
Does TLK1101ERGPR require external termination resistors?
No, TLK1101ERGPR does not require external termination resistors. Its differential inputs (DIN+/DIN−) feature internal 50 Ω termination to VCC, and its differential outputs (DOUT+/DOUT−) include internal 50 Ω back-termination to VCC. This eliminates the need for discrete 50 Ω resistors on PCB, simplifying layout and reducing BOM count. AC coupling capacitors remain mandatory on both input and output paths.
How is output de-emphasis configured on TLK1101ERGPR?
Output de-emphasis on TLK1101ERGPR is configured using two three-state pins: DE0 and DE1. These pins support nine combinations (including open states) to select de-emphasis values from 0 dB to 7 dB in precise 0.875-dB increments, as defined in Table 1 of the datasheet. Alternatively, de-emphasis can be set via I²C register address 0x02 (bits DEEM3–DEEM0), allowing runtime adjustment without changing hardware straps.
Can TLK1101ERGPR operate with single-ended inputs or outputs?
No, TLK1101ERGPR is strictly a differential device. It accepts only AC-coupled differential CML inputs (DIN+/DIN−) and delivers differential CML outputs (DOUT+/DOUT−). The internal architecture relies on balanced signaling for noise immunity and common-mode rejection. Single-ended interfaces are incompatible; external differential-to-single-ended conversion would degrade performance and violate specified operating conditions.
What is the function of the exposed pad (EP) on TLK1101ERGPR?
The exposed pad (EP) on TLK1101ERGPR must be soldered to a solid PCB ground plane. It serves dual purposes: (1) thermal dissipation, lowering junction temperature under full-load operation, and (2) electrical grounding for analog and digital return currents. TI specifies that EP connection is mandatory for compliance with absolute maximum ratings and recommended operating conditions; floating or unconnected EP may cause thermal runaway or signal integrity degradation.
TLK1101ERGPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Data Management
- Interface:
- 2-Wire Serial
- Voltage - Supply:
- 2.95V ~ 3.6V
- Supplier Device Package:
- 20-QFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TLK1101ERGPR FAQ
1.How can I place an order for TLK1101ERGPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLK1101ERGPR 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 TLK1101ERGPR reliable?
The price and inventory of TLK1101ERGPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLK1101ERGPR is usually 5 days.
3.What payment methods are accepted for TLK1101ERGPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLK1101ERGPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLK1101ERGPR?
TLK1101ERGPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLK1101ERGPR 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 TLK1101ERGPR?
For technical support, including TLK1101ERGPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLK1101ERGPR requirements.
6.How does Aetrix verify that TLK1101ERGPR is sourced from the original manufacturer or authorized distributors?
All TLK1101ERGPR 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 TLK1101ERGPR meets industry standards.
7.What is the process for return or replacement of TLK1101ERGPR?
All TLK1101ERGPR units undergo pre-shipment inspection (PSI). If there is an issue with TLK1101ERGPR, 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 TLK1101ERGPR part is unused and in its original packaging.
Return procedure for TLK1101ERGPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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