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Microchip Technology EQCO850SC.1
- Part No.:
- EQCO850SC.1
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
EQCO850SC.1.pdf
- Description:
- IC INTERFACE SPECIALIZED 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,454
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Product details
Overview
EQCO850SC.1 from EqcoLogic NV is a single-coax transceiver IC designed for full-duplex Fast Ethernet (125 Mbps) over 50Ω coaxial cable, integrating transmitter, receiver, and adaptive equalizer functions. It operates from a single 3.3 V supply, consumes 205 mW, supports PoE delivery over coax, and uses integrated 50Ω termination to minimize external components.
For engineers reviewing the EQCO850SC.1 datasheet, EQCO850SC.1 pinout, EQCO850SC.1 application, or EQCO850SC.1 equivalent, key selection criteria include coax impedance matching (50Ω), FX-compliant PHY interface compatibility, cable cut detection capability, and QFN-16 package layout constraints for high-frequency signal integrity.
Technical Context
The EQCO850SC.1 implements an active signal splitter/combiner with precise 50Ω coax termination and embedded auto-adaptive analog equalization that converges in microseconds to compensate for frequency-dependent cable attenuation up to 10 dB at 62.5 MHz. Its SDIp/SDIn inputs are internally terminated to 104 Ω differential and feature transmit wake-up detection.
SDOp/SDOn outputs deliver LVDS-compatible signals (1.2 V common-mode, 100 Ω differential source impedance) with 240 ps typical rise/fall time; SDIO/REF interface requires direct connection to coax inner conductor and outer screen via matched 50Ω resistor, respectively, to enable hybrid subtraction of near-end transmit leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V ±5% - powers all analog/digital blocks from single rail; AVCC must be filtered via ferrite bead to reduce noise coupling into coax path. |
| Power Consumption | 205 mW total - enables thermal management in compact camera enclosures without heatsinking. |
| Cable Impedance | 50 Ω - mandates use with 50Ω coax (e.g., RG58) and 50Ω PCB trace routing between SDIO and connector. |
| Data Rate | 125 Mbps - matches IEEE 802.3 100BASE-FX bit rate after 4B/5B encoding; requires DC-balanced input. |
| Operating Temperature | –10°C to +70°C - validated for indoor surveillance and home networking environments. |
| Equalizer Bandwidth | Compensates up to 10 dB attenuation @ 62.5 MHz - restores signal integrity over 150 m RG6 or equivalent 50Ω cable. |
| ESD Rating | 8 kV contact (IEC 61000-4-2) - protects against handling and field-induced discharge on coax interface pins. |
Pinout & Package
EQCO850SC.1 is housed in a 16-pin, 4 mm × 4 mm, 0.65 mm pitch QFN package (JEDEC MO-220 compliant) with exposed thermal pad (GND TAB) for enhanced heat dissipation and EMC grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND TAB | Power Ground | Exposed thermal pad; must be soldered to large PCB ground plane for thermal and RF return path integrity. |
| DVCC (Pin 15) | Digital Supply | +3.3 V digital core supply; requires local 10 nF decoupling to DGND. |
| DGND (Pin 13) | Digital Ground | Reference for SDIp/SDIn inputs and digital logic; separate from AGND to prevent noise coupling. |
| AVCC (Pin 1) | Analog Supply | +3.3 V analog supply; filtered via ferrite bead and capacitor to coax shield for low-noise biasing. |
| AGND (Pin 4) | Analog Ground | Direct connection point to coax outer conductor; forms reference for REF and SDIO termination. |
| SDIO (Pin 2) | Bidirectional Coax Interface | Single-ended sum node for TX+RX coax signals; connects directly to coax center conductor. |
| REF (Pin 3) | Coax Reference | Anti-phase current reference; terminates to AGND via 50Ω resistor matched to coax Z₀. |
| SDIp / SDIn (Pins 10/9) | Differential PHY Input | LVDS-like FX receive pair; internally terminated to 104 Ω; requires AC coupling to PHY. |
| SDOp / SDOp (Pins 12/11) | Differential PHY Output | LVDS-compatible 1.2 V CM, 100 Ω differential output; connects to FX PHY RX inputs. |
| OPT0 / OPT1 (Pins 14/5) | Mode Configuration | Fast Ethernet mode enabled when OPT0 = DGND and OPT1 = DVCC. |
| CCUT (Pin 16) | Cable Cut Detection | Optional fault-sensing input; connects via 3 kΩ to coax inner conductor; disabled if PoE is present. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 50Ω coax termination | Eliminates need for external resistors on SDIO/REF path, reducing BOM count and PCB area in space-constrained IP camera modules. |
| Auto-adaptive analog equalizer | Real-time compensation for cable loss up to 10 dB at 62.5 MHz ensures reliable link establishment across variable 50Ω coax lengths without manual tuning. |
| PoE-over-coax support | Enables simultaneous data + power delivery over same 50Ω coax, simplifying installation in legacy coax infrastructure without separate power wiring. |
| Transmit wake-up detection | Reduces idle power by >40% (to 35 mA typ) when no valid 125 Mbps signal is detected on SDIp/SDIn, extending system energy efficiency. |
| QFN-16 with exposed thermal pad | Provides low thermal resistance (<30°C/W) and robust RF grounding for EMI-sensitive coax interface, critical for FCC/CE compliance in consumer devices. |
Applications
| IP Camera Backhaul | Home Networking over Coax |
|---|---|
Use Scenario: Connecting HD security cameras to NVR over existing 50Ω coax cabling in commercial buildings where Cat5/6 is unavailable. IC Role / Device Role / Timing Role: Full-duplex physical layer transceiver enabling 100BASE-FX over coax; handles adaptive equalization and hybrid cancellation. Use Value: Achieves 150 m reach over RG6 with 125 Mbps throughput while supporting PoE to eliminate local power adapters at camera sites. | Use Scenario: Extending Ethernet connectivity between STB, TV, and PVR using unused 50Ω coax drops in multi-room residential installations. IC Role / Device Role / Timing Role: Bidirectional media converter bridging FX PHYs across coax; maintains 4B/5B encoding integrity and jitter <50% UI. Use Value: Enables plug-and-play Ethernet extension without rewiring, leveraging installed coax with zero latency impact on streaming video. |
| Industrial Machine Vision | Medical Imaging Equipment |
Use Scenario: High-reliability data link between inspection cameras and control PCs in factory automation systems with EMI-heavy environments. IC Role / Device Role / Timing Role: Robust coax PMD transceiver with 8 kV ESD protection and –10°C to +70°C operation for industrial enclosures. Use Value: Maintains deterministic 125 Mbps link under electrical noise, eliminating packet loss during real-time image acquisition. | Use Scenario: Transmitting uncompressed endoscopic video from probe head to display unit through flexible 50Ω coax within medical device chassis. IC Role / Device Role / Timing Role: Low-jitter (≤50% UI), low-power (205 mW) transceiver ensuring signal fidelity for diagnostic-grade imaging. Use Value: Preserves pixel-level accuracy and timing synchronization required for FDA-cleared imaging systems without added latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-coax Fast Ethernet transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EQCO850SC.3 | Same silicon and package; qualified production version vs. EQCO850SC.1's end-of-life status; identical electrical specs and pinout. | Supports volume manufacturing with full qualification testing; EQCO850SC.1 is not recommended for new designs. | Select EQCO850SC.3 for new designs requiring long-term supply assurance and full production validation. |
| MAX24287 | 50Ω coax transceiver with integrated 100Base-TX MAC interface; requires external clock; no built-in equalizer. | Targets cost-sensitive consumer gear; lacks auto-adaptive equalization and PoE-over-coax capability. | Choose MAX24287 only if system already includes MAC-layer processing and shorter coax runs (<50 m) suffice. |
Compared with EQCO850SC.1, EQCO850SC.3 offers assured supply continuity and qualification-backed reliability, while MAX24287 trades adaptive equalization and PoE support for lower integration complexity in non-demanding coax links.
Availability
EQCO850SC.1 is available at Aetrix Electronics and suitable for IP camera backhaul, home networking over coax, and industrial machine vision applications requiring stable component supply despite its end-of-life status.
Supply support for EQCO850SC.1 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
EqcoLogic NV is a Belgian semiconductor company specializing in high-speed analog and mixed-signal solutions for data-over-coax and fiber-optic physical layers.
The EQCO850SC.1 belongs to EqcoLogic's single-coax transceiver product line, engineered specifically to replace legacy analog video coax with standardized Fast Ethernet while preserving infrastructure investment.
FAQ
What is the primary function of the EQCO850SC.1 in a Fast Ethernet over coax system?
The EQCO850SC.1 serves as a full-duplex physical layer transceiver that simultaneously transmits and receives 125 Mbps 100BASE-FX signals over a single 50Ω coax cable. It integrates an adaptive equalizer, active hybrid combiner, and LVDS-compatible PHY interface - enabling seamless interoperability with standard FX-compliant Ethernet controllers without requiring external equalization or termination components. The EQCO850SC.1 is essential for converting legacy coax infrastructure into deterministic Ethernet links.
Can the EQCO850SC.1 be used with 75Ω coax cable instead of 50Ω?
No - the EQCO850SC.1 is specifically designed and characterized for 50Ω coax systems, including internal termination and equalizer calibration optimized for 50Ω impedance. Using it with 75Ω coax will degrade return loss, increase reflections, and impair equalizer convergence, resulting in unreliable link operation beyond short distances. For 75Ω applications, the EQCO875SC.1 or EQCO875SC.3 must be selected instead.
Does the EQCO850SC.1 support Power over Coax (PoC) alongside data transmission?
Yes - the EQCO850SC.1 fully supports PoE-based power distribution over the same 50Ω coax cable carrying data, provided the CCUT (cable cut detection) pin is left unconnected or disabled. When CCUT is active, PoC must be omitted due to voltage tolerance limitations on that pin. System-level PoC implementation requires proper isolation and DC blocking on the PHY side, as outlined in EqcoLogic Application Note AN0907.
What is the role of the OPT0 and OPT1 pins on the EQCO850SC.1?
The OPT0 and OPT1 pins configure the operational mode of the EQCO850SC.1. To enable Fast Ethernet mode, OPT0 must be connected to DGND and OPT1 to DVCC. These pins are not floating-tolerant and must be actively biased; leaving them unconnected may result in undefined behavior or failure to initialize the transceiver core. No other configuration modes are supported for the EQCO850SC.1.
How does the adaptive equalizer in the EQCO850SC.1 improve link performance over long coax runs?
The EQCO850SC.1's embedded analog equalizer continuously monitors incoming signal spectral content and dynamically adjusts a multi-pole filter response to compensate for frequency-dependent attenuation - restoring signal integrity up to 10 dB at 62.5 MHz. This enables reliable 125 Mbps operation over 150 m of RG6 coax without manual tuning or external components. The equalizer converges within microseconds upon link establishment, ensuring rapid, deterministic startup for time-critical applications like security camera streaming.
EQCO850SC.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Camera
- Interface:
- -
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 16-QFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
EQCO850SC.1 FAQ
1.How can I place an order for EQCO850SC.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for EQCO850SC.1 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 EQCO850SC.1 reliable?
The price and inventory of EQCO850SC.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EQCO850SC.1 is usually 5 days.
3.What payment methods are accepted for EQCO850SC.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EQCO850SC.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EQCO850SC.1?
EQCO850SC.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EQCO850SC.1 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 EQCO850SC.1?
For technical support, including EQCO850SC.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EQCO850SC.1 requirements.
6.How does Aetrix verify that EQCO850SC.1 is sourced from the original manufacturer or authorized distributors?
All EQCO850SC.1 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 EQCO850SC.1 meets industry standards.
7.What is the process for return or replacement of EQCO850SC.1?
All EQCO850SC.1 units undergo pre-shipment inspection (PSI). If there is an issue with EQCO850SC.1, 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 EQCO850SC.1 part is unused and in its original packaging.
Return procedure for EQCO850SC.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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