My Inquiry
My Account
Texas Instruments TLK4201EARGTR
- Part No.:
- TLK4201EARGTR
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TLK4201EARGTR.pdf
- Description:
- IC INTERFACE SPECIALIZED 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,077
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLK4201EARGTR from Texas Instruments is a 4.25-Gbps fixed-gain limiting equalizer IC for high-speed serial data links, featuring 12 dB high-frequency boost at 2.1 GHz, 100 mVP-P input sensitivity (BER < 10−12), 32–38 mA supply current at 3.3 V, and operation over −40°C to 85°C. It compensates up to 36 inches of FR4 stripline or 30 feet of CX4 cable in Fibre Channel and backplane interconnect systems.
For engineers reviewing the TLK4201EARGTR datasheet, TLK4201EARGTR pinout, TLK4201EARGTR application, or TLK4201EARGTR equivalent, key selection criteria include differential input dynamic range (100–2000 mVP-P), CML output swing (600–1200 mVP-P), LOS threshold adjustability, polarity select, and disable functionality in a space-constrained 3-mm × 3-mm QFN package.
Technical Context
The TLK4201EARGTR implements a fixed-equalization architecture with three gain stages and on-chip 100-Ω differential input termination, delivering deterministic jitter ≤20 psP-P and random jitter ≤4 psRMS at 4.25 Gbps over 36-inch FR4 stripline. Its high-speed data path includes offset cancellation circuitry and a dedicated loss-of-signal (LOS) detection block with 40–80 mVP-P assert threshold.
It integrates bandgap-based bias generation for supply-independent operation, supports external filter capacitor connection via COC1/COC2 pins to extend low-frequency cutoff below 10 kHz, and provides CML outputs with 50-Ω single-ended back-termination to VCC - enabling direct interface with downstream receivers without external termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 4.25 Gbps - supports Fibre Channel 4GFC and multirate links up to 4.25 Gbps without retuning. |
| High-Frequency Boost | 12 dB at 2.1 GHz - restores signal integrity degraded by frequency-dependent loss in long PCB traces or cables. |
| Input Sensitivity | 100 mVP-P (BER < 10−12) - enables reliable reception of attenuated signals after 36″ FR4 or 30′ CX4 cable. |
| Supply Current | 32–38 mA at 3.3 V - ultralow power consumption suitable for dense backplane or rack-to-rack modules. |
| Differential Input Range | ±2.5 V - accommodates overdriven inputs up to 2000 mVP-P while maintaining low-jitter output. |
| Output Swing | 600–1200 mVP-P (disabled/enabled) - CML-compatible output swing ensures compatibility with standard receiver inputs. |
| Operating Temperature | −40°C to 85°C - qualified for industrial and telecom infrastructure environments. |
Pinout & Package
The TLK4201EARGTR is housed in a 3-mm × 3-mm, 16-pin VQFN (RGT) package with exposed thermal pad (EP), 0.5-mm pitch, and RoHS-compliant lead finish. The package supports reflow soldering per JEDEC MSL rating (not specified in datasheet; consult TI for latest).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (1, 4, 12) | Power Supply | 3.3 V ±10% supply input; three pins reduce IR drop and improve decoupling for high-speed operation. |
| DIN+, DIN− (2, 3) | Differential Analog Input | 100-Ω on-chip differential termination; accepts AC-coupled high-speed serial data with ≥100 mVP-P swing. |
| LOSDIS (5) | CMOS Control Input | Disables LOS detection when pulled high; internal 825-kΩ pulldown enables default active mode. |
| DISABLE (6) | CMOS Control Input | Shuts down CML output stage when high; 400-kΩ pulldown ensures safe default state. |
| LOS (7) | CMOS Output | Open-drain flag indicating input amplitude below threshold; used for squelch or system fault signaling. |
| GND (8, 16) | Ground Reference | Signal and power ground return; EP must be soldered to PCB ground plane for thermal and EMI performance. |
| OUTPOL (9) | CMOS Control Input | Selects output polarity (normal/inverted); 715-kΩ internal pullup enables open-pin default to normal polarity. |
| DOUT+, DOUT− (10, 11) | CML Differential Output | 50-Ω on-chip back-termination to VCC; delivers full-swing CML output compatible with standard receivers. |
| NC (13) | No Connect | Unbonded pin; must remain unconnected per TI design guidelines. |
| COC1, COC2 (14, 15) | Analog Filter Terminals | Connect external capacitor to extend offset cancellation loop bandwidth below 10 kHz; shorting disables loop. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Equalization with 12 dB Boost | Restores high-frequency content lost in FR4 or CX4 channels without adaptive complexity or latency variation. |
| Input Offset Cancellation | Compensates internal DC offsets to maintain signal integrity across wide input swing range (100–2000 mVP-P). |
| Selectable Loss-of-Signal Detection | Configurable LOS assertion (40–80 mVP-P) enables robust link monitoring without external comparators. |
| CML Output with Polarity Select | Eliminates need for external inverters or layout-level signal routing changes during system bring-up. |
| Ultralow Power Consumption | 32–38 mA at 3.3 V allows integration into thermally constrained multi-channel backplane cards. |
Applications
| Fibre Channel Systems | Backplane Interconnect |
|---|---|
Use Scenario: Receiving 4.25-Gbps FC-4 encoded data across midplane connectors in storage area network (SAN) switches. IC Role / Device Role / Timing Role: Fixed-gain limiting equalizer restoring signal integrity after 24–36 inch FR4 stripline loss. Use Value: Enables reliable BER < 10−12 operation without requiring channel-adaptive equalizers or complex training sequences. | Use Scenario: Compensating frequency-dependent attenuation in 16-lane parallel backplanes between line cards and fabric modules. IC Role / Device Role / Timing Role: High-speed analog signal conditioner placed at receiver side of each differential lane. Use Value: Supports multirate operation (1.0625/2.125/4.25 Gbps) across legacy and upgraded systems using same hardware design. |
| Rack-to-Rack Interconnect | High-Speed Data Systems |
Use Scenario: Extending 4.25-Gbps serial links over 30-foot CX4 copper cables between compute and storage racks. IC Role / Device Role / Timing Role: Cable equalizer providing 12 dB boost at 2.1 GHz to overcome insertion loss and skin effect. Use Value: Eliminates need for active optical cables or repeaters, reducing total system cost and power budget. | Use Scenario: Signal conditioning in test equipment front-ends handling PRBS231–1 patterns at 4.25 Gbps. IC Role / Device Role / Timing Role: Low-jitter, high-dynamic-range analog front-end for bit-error-rate testers and protocol analyzers. Use Value: Delivers deterministic jitter ≤20 psP-P and random jitter ≤4 psRMS, meeting IEEE 802.3 compliance margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3801ETM+ | 2.5-Gbps max rate; 10 dB boost at 1.25 GHz; requires dual 3.3 V/2.5 V supplies; no integrated LOS detection. | Limited to 2.5 Gbps Fibre Channel (2GFC); not suitable for 4GFC or CX4 cable extension beyond 15 ft. | Choose only if operating strictly at ≤2.5 Gbps and dual-supply architecture is already in place. |
| DS100BR111SQ/NOPB | 4.25-Gbps redriver with programmable equalization (0–15 dB); higher power (65 mA); integrated I2C control. | Supports adaptive tuning and diagnostics but adds firmware dependency; larger 4-mm × 4-mm package. | Prefer when channel adaptation, telemetry, or multi-protocol flexibility (SAS/SATA/PCIe) is required. |
Compared with MAX3801ETM+ and DS100BR111SQ/NOPB, the TLK4201EARGTR offers fixed, low-latency equalization optimized for deterministic 4.25-Gbps links with minimal BOM count and zero configuration overhead - ideal for cost-sensitive, high-volume backplane and cable-receiver applications where simplicity and power efficiency are prioritized over programmability.
Availability
TLK4201EARGTR is available at Aetrix Electronics and suitable for Fibre Channel systems, backplane interconnects, rack-to-rack cabling, and high-speed data acquisition requiring stable component supply despite its obsolete status per TI's packaging addendum.
Supply support for TLK4201EARGTR 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 company headquartered in Dallas, Texas, designing and manufacturing analog, embedded processing, and logic products for industrial, automotive, and communications markets.
The TLK4201EARGTR belongs to TI's high-speed interface product line, developed specifically for signal integrity restoration in multigigabit serial links where fixed equalization, low power, and small footprint are critical - targeting Fibre Channel, InfiniBand, and proprietary backplane architectures.
FAQ
What is the maximum supported data rate for TLK4201EARGTR?
The TLK4201EARGTR supports a maximum data rate of 4.25 Gbps, validated for K28.5 pattern transmission with BER < 10−12 over 36-inch FR4 stripline or 30-foot CX4 cable. It operates reliably at lower multirate speeds including 1.0625 Gbps and 2.125 Gbps without reconfiguration. This capability is confirmed in TI's SLLS719 datasheet AC characteristics table and typical performance curves.
Does TLK4201EARGTR require external termination resistors?
No, TLK4201EARGTR does not require external termination resistors. It features on-chip 100-Ω differential termination at DIN+/DIN− inputs and 50-Ω single-ended back-termination to VCC at DOUT+/DOUT− outputs. External AC-coupling capacitors (C1–C4) are the only required passive components per TI's recommended application circuit in Figure 13 of the datasheet.
How does the LOS function work on TLK4201EARGTR?
The LOS function on TLK4201EARGTR monitors low-frequency components of the input signal and asserts a high-level CMOS output when amplitude falls below a fixed threshold (40–80 mVP-P). It can be disabled by pulling LOSDIS high. A squelch function is implemented by connecting LOS to DISABLE, suppressing output chatter during signal loss - all detailed in the "Loss of Signal Detection" section of the SLLS719 datasheet.
What is the purpose of COC1 and COC2 pins on TLK4201EARGTR?
COC1 and COC2 pins on TLK4201EARGTR provide access to the internal offset cancellation loop filter node. Connecting an external capacitor between them extends the low-frequency cutoff below the default 10 kHz. Shorting COC1 and COC2 disables the offset cancellation loop entirely. This behavior is documented in TI's block diagram description and terminal functions table in the SLLS719 datasheet.
Is TLK4201EARGTR still in production?
According to TI's Packaging Information Addendum dated November 2025, TLK4201EARGTR is marked "Obsolete" with status "Production", indicating it is no longer being manufactured but may remain available through authorized distributors or inventory channels. Aetrix Electronics maintains traceable stock and supports lifecycle coordination for ongoing production programs requiring this device.
TLK4201EARGTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Applications:
- Digital High-Speed Link
- Interface:
- 2-Wire Serial
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 16-VQFN (3x3)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TLK4201EARGTR FAQ
1.How can I place an order for TLK4201EARGTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLK4201EARGTR 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 TLK4201EARGTR reliable?
The price and inventory of TLK4201EARGTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLK4201EARGTR is usually 5 days.
3.What payment methods are accepted for TLK4201EARGTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLK4201EARGTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLK4201EARGTR?
TLK4201EARGTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLK4201EARGTR 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 TLK4201EARGTR?
For technical support, including TLK4201EARGTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLK4201EARGTR requirements.
6.How does Aetrix verify that TLK4201EARGTR is sourced from the original manufacturer or authorized distributors?
All TLK4201EARGTR 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 TLK4201EARGTR meets industry standards.
7.What is the process for return or replacement of TLK4201EARGTR?
All TLK4201EARGTR units undergo pre-shipment inspection (PSI). If there is an issue with TLK4201EARGTR, 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 TLK4201EARGTR part is unused and in its original packaging.
Return procedure for TLK4201EARGTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLK4201EARGTR Tags
-
NVT4857UKAZ
NXP Semiconductors
-
TCA8418RTWR
Texas Instruments
-
PCA9546APWR
Texas Instruments
-
MD0100N8-G
Microchip Technology
-
PCA9548APW,118
NXP Semiconductors
-
PCA9540BDP,118
NXP Semiconductors
-
PCA9548APWR
Texas Instruments
-
PCA9546APW,118
NXP Semiconductors
-
PTN3360DBS,518
NXP Semiconductors
-
PCA9546ABS,118
NXP Semiconductors
-
PCA9518PWR
Texas Instruments
-
PCA9545APW,118
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
