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Texas Instruments ONET9901PARGPG4
- Part No.:
- ONET9901PARGPG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ONET9901PARGPG4.pdf
- Description:
- IC LIMITING 1 CIRCUIT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,981
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Product details
Overview
ONET9901PARGPG4 from Texas Instruments is a 10.7-Gbps high-speed limiting amplifier with 42 dB typical gain, 2 mVp-p input sensitivity, and CML differential outputs. It operates from a single 3.3-V supply, consumes 116 mW typical power, and delivers low-jitter signal conditioning for fiber-optic receiver front-ends in OC-192 SONET/SDH systems.
For engineers reviewing the ONET9901PARGPG4 datasheet, ONET9901PARGPG4 pinout, ONET9901PARGPG4 application, or ONET9901PARGPG4 equivalent, key selection criteria include input dynamic range (up to 1200 mVp-p), programmable loss-of-signal detection, offset cancellation, and 20-pin QFN package compatibility with high-density optical module layouts.
Technical Context
The ONET9901PARGPG4 implements a three-stage high-speed gain path with on-chip 50-Ω differential input termination to VCCI and 50-Ω CML output back-termination to VCCO. Its offset cancellation loop supports stable operation down to 42 kHz low-frequency cutoff, extendable via external COC1/COC2 filter capacitors.
Loss-of-signal detection is user-programmable via an external resistor on the TH pin (2–50 mVp-p threshold range) and can be disabled by grounding LOSEN. The device integrates a bandgap voltage reference and bias current generation block, enabling consistent performance across 0°C to 85°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 10.7 Gbps - supports OC-192 and 10-GbE physical layer compliance |
| Small-signal bandwidth | 10 GHz - ensures minimal amplitude distortion at full data rate |
| Input sensitivity | 2 mVp-p - enables reliable recovery of weak signals from long-haul fiber links |
| Input overload | 1200 mVp-p - accommodates large-swing transimpedance amplifier outputs without saturation |
| Differential output swing | 190–400 mVp-p - matches standard CML logic thresholds for downstream retimers or clock-data recovery ICs |
| Power consumption | 116 mW typical - reduces thermal load in compact pluggable modules (e.g., XFP, SFP+) |
| Operating temperature | 0°C to 85°C - qualified for commercial-grade optical line card environments |
Pinout & Package
The ONET9901PARGPG4 is housed in a 4 mm × 4 mm, 20-pin QFN package (RGP drawing) with 0.5-mm pitch and exposed thermal pad (EP) requiring solder connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1, 4, 6, 8, 11, EP) | Ground reference | Multiple dedicated ground pins + exposed pad ensure low-inductance return paths for high-frequency analog and digital sections |
| DIN+, DIN− (2, 3) | Differential analog input | On-chip 50-Ω termination to VCCI enables direct AC-coupled connection to TIAs without external resistors |
| DOUT+, DOUT− (13, 14) | Differential CML output | 50-Ω on-chip back-termination to VCCO simplifies interface to CDR or multiplexer inputs |
| DISABLE (16) | CMOS control input | Active-high disable shuts down CML output stage within 20 ns, supporting low-power sleep modes |
| TH (10), LOSEN (7), LOS (9) | LOS configuration & status | TH sets detection threshold; LOSEN enables/disables circuit; LOS provides open-drain CMOS flag for system monitoring |
| COC1, COC2 (18, 19) | Offset cancellation filter | External capacitor between these pins extends low-frequency response below 42 kHz for DC-coupled applications |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable loss-of-signal detection | Threshold programmable from 2–50 mVp-p via external resistor on TH pin, enabling precise alignment with TIA output noise floor |
| Input offset cancellation | Active feedback loop compensates internal DC offsets, maintaining BER < 10−12 at 2 mVp-p input under temperature variation |
| Low-power CML output stage | Delivers 190–400 mVp-p swing with 20-ps rise/fall times while consuming only 116 mW from 3.3 V |
| High input dynamic range | Supports 60-dB input amplitude range (2–1200 mVp-p) without gain compression or jitter degradation |
| Single-supply operation | Full functionality from one 3.3-V ±10% rail-eliminates need for negative or auxiliary supplies in optical modules |
Applications
| SONET/SDH OC-192 Receivers | 10-GbE LAN/WAN PHY |
|---|---|
Use Scenario: Front-end amplification in long-haul SONET/SDH line cards receiving 10.7-Gbps NRZ signals after dispersion-compensated fiber transmission. IC Role / Device Role / Timing Role: Limiting amplifier providing gain, jitter reduction, and loss-of-signal indication prior to clock-data recovery. Use Value: 42 dB gain ensures full CML swing from weak photodiode/TIA outputs; programmable LOS enables adaptive alarm triggering across varying link budgets. | Use Scenario: Signal conditioning in enterprise or carrier-grade 10-Gigabit Ethernet switches supporting both LAN PHY (IEEE 802.3ae) and WAN PHY (ITU-T G.709) modes. IC Role / Device Role / Timing Role: High-fidelity limiting amplifier interfacing between optical receiver and serializer/deserializer (SerDes) with CML-compatible inputs. Use Value: 1200 mVp-p input overload tolerance prevents clipping from burst-mode or misaligned optics; 20-ps edge rates preserve eye opening at 10.7 Gbps. |
| 10-Gbps Fibre Channel Receivers | Optical Transport Network (OTN) Monitoring |
Use Scenario: Embedded in FC-10G (10GFC) host bus adapters and storage area network (SAN) switches handling 8.5–10.51875 Gbps FC protocols. IC Role / Device Role / Timing Role: Limiting amplifier delivering clean, jitter-controlled data to FC-specific CDR circuits with deterministic latency. Use Value: Low deterministic jitter (1.8–16 ps) at full data rate maintains FC link integrity; DISABLE pin enables fast channel power gating during link idle states. | Use Scenario: Real-time signal health monitoring in OTN add-drop multiplexers where received signal strength must be tracked across multiple wavelengths. IC Role / Device Role / Timing Role: Analog front-end component providing both amplified data output and calibrated RSSI-like LOS status for system management processors. Use Value: TH pin programmability allows per-channel LOS threshold tuning; COC1/COC2 filter extension supports slow-varying optical power drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed limiting amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3748AETE+ | 10.3-Gbps max rate; 3.3-V supply; integrated LOS with fixed 15-mV threshold; no external COC filter option | Limited to 10.3 Gbps; lacks programmable LOS and adjustable offset cancellation bandwidth | Preferred when fixed-threshold LOS suffices and board space constraints favor smaller 16-pin TQFN |
| LMH0394SQ/NOPB | 11.3-Gbps capability; 2.5-V supply; includes automatic gain control (AGC); no CML outputs (LVDS) | Requires dual-supply design; outputs incompatible with CML-based CDRs without level translation | Selected for higher-rate or AGC-dependent architectures where LVDS interface is acceptable |
Compared with MAX3748AETE+ and LMH0394SQ/NOPB, the ONET9901PARGPG4 uniquely combines 10.7-Gbps operation, fully programmable LOS, and CML-compatible outputs in a single 3.3-V supply 20-pin QFN-making it optimal for OC-192 and 10-GbE receiver designs requiring precision signal health monitoring and minimal external components.
Availability
ONET9901PARGPG4 is available at Aetrix Electronics and suitable for SONET/SDH line cards, 10-GbE switch fabric interfaces, and Fibre Channel storage interconnects requiring stable component supply across extended production lifecycles.
Supply support for ONET9901PARGPG4 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, specializing in analog, embedded processing, and high-speed interface solutions for communications, industrial, and automotive markets.
The ONET9901PARGPG4 belongs to TI's ONET family of optical networking ICs, engineered specifically for high-performance, low-power limiting amplification in 10-Gbps-class fiber-optic receivers used in telecom infrastructure and data center interconnects.
FAQ
What is the maximum data rate supported by the ONET9901PARGPG4?
The ONET9901PARGPG4 supports a maximum data rate of 10.7 Gbps, validated for OC-192 SONET/SDH, 10-Gbps Fibre Channel, and IEEE 802.3ae 10-GbE applications. This rating is specified under recommended operating conditions (3.3 V, 0°C to 85°C) with deterministic jitter ≤16 ps at full rate using K28.5 PRBS patterns.
Does the ONET9901PARGPG4 require external termination resistors on its input or output pins?
No, the ONET9901PARGPG4 does not require external termination resistors. It features on-chip 50-Ω differential input termination to VCCI on DIN+/DIN− and 50-Ω CML output back-termination to VCCO on DOUT+/DOUT−, enabling direct AC-coupled interface with TIAs and CDRs without discrete resistors.
How is loss-of-signal detection configured on the ONET9901PARGPG4?
Loss-of-signal detection on the ONET9901PARGPG4 is configured using an external resistor connected between the TH pin and GND, setting the detection threshold between 2 mVp-p and 50 mVp-p. The LOSEN pin must be pulled high to enable the function; pulling LOSEN low disables the entire LOS circuit block.
Can the ONET9901PARGPG4 operate with input signals exceeding 100 mVp-p?
Yes, the ONET9901PARGPG4 supports input signals up to 1200 mVp-p without gain compression or increased jitter. Its high input dynamic range ensures stable limiting behavior and BER < 10−12 even under severe overdrive conditions common in short-reach or misaligned optical links.
What is the purpose of the COC1 and COC2 pins on the ONET9901PARGPG4?
The COC1 and COC2 pins on the ONET9901PARGPG4 provide access to the internal offset cancellation loop filter. Connecting an external capacitor between them lowers the low-frequency cutoff from 42 kHz to values as low as 8 kHz, supporting DC-coupled or ultra-low-frequency applications where baseline wander compensation is critical.
ONET9901PARGPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Limiting
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 10 GHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 35mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 3.6 V
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
ONET9901PARGPG4 FAQ
1.How can I place an order for ONET9901PARGPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ONET9901PARGPG4 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 ONET9901PARGPG4 reliable?
The price and inventory of ONET9901PARGPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ONET9901PARGPG4 is usually 5 days.
3.What payment methods are accepted for ONET9901PARGPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ONET9901PARGPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ONET9901PARGPG4?
ONET9901PARGPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ONET9901PARGPG4 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 ONET9901PARGPG4?
For technical support, including ONET9901PARGPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ONET9901PARGPG4 requirements.
6.How does Aetrix verify that ONET9901PARGPG4 is sourced from the original manufacturer or authorized distributors?
All ONET9901PARGPG4 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 ONET9901PARGPG4 meets industry standards.
7.What is the process for return or replacement of ONET9901PARGPG4?
All ONET9901PARGPG4 units undergo pre-shipment inspection (PSI). If there is an issue with ONET9901PARGPG4, 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 ONET9901PARGPG4 part is unused and in its original packaging.
Return procedure for ONET9901PARGPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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