EQCO125X40C1-I/8EX - 12.5 Gbps CoaXPress 2.0 Equalizer/Driver | Microchip
MPN: EQCO125X40C1-I/8EX ✓ Hoạt độngEQCO125X40C1-I/8EX Tóm tắt
An equalizer for coaxial cable is a specialized high-speed interface IC that compensates the frequency-dependent attenuation of a coaxial transmission line, restoring high-frequency content that is otherwise lost over long cable runs. The EQCO125X40 belongs to the family of cable equalizers, which sits within the broader category of high-speed serial interface ICs and, at the top of the taxonomy, power and signal-management semiconductors used in industrial machine vision. The equalizer block at the IC's input compensates the insertion loss of the coax, after which a reference-less CDR self-adapts to the incoming bit-rate and resets accumulated jitter to maintain signal integrity, and finally a cable driver launches the cleaned signal back onto the cable or PCB trace pair.
Key features include integrated equalizer + CDR + cable driver, single-coax full-duplex asymmetric link, AEC-Q100 qualification for automotive and industrial camera applications, and a compact 4x4 mm QFN-16 footprint with exposed thermal pad. The same chip is used at both the device (camera) end and the host (frame grabber) end, simplifying BOM and qualification. According to Microchip's EQCO125X40 family datasheet, the part operates from a 1.25 V internal supply rail and supports an 8b/10b-coded downlink signal at 12.5 Gbps in addition to the 1.25 Gbps uplink.
Typical applications include CoaXPress 2.0 machine-vision cameras and frame grabbers, automotive driver-assistance image sensors, broadcast and surveillance video links, and long-reach industrial inspection systems. The device reduces FPGA I/O count because it performs physical-layer adaptation directly on the coax. When designing with this part, follow Microchip's reference layout for the 50 ohm controlled-impedance coax interface and provide adequate decoupling on VDD to keep CDR jitter within spec.
Bộ thay thế dễ dàng lắp đặt cho EQCO125X40C1-I/8EX — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
EQCO125X40C1-I/8E
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EQCO62X20C1-I/8EX
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EQCO125X40C1-I/4EX
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EQCO125X40C1-I/2EX
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EQCO125X40C1-I/3DW
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EQCO125X40C1-I/8EX Thông số kỹ thuật
| Chức năng | CoaXPress 2.0 Asymmetric Equalizer / CDR / Cable Driver |
| Downlink Data Rate | 12.5 Gbps |
| Uplink Data Rate | 1.25 Gbps |
| Max Cable Reach (12.5 Gbps, Belden 1694A) | 40 m |
| Max Cable Reach (1.25 Gbps, Belden 1694A) | 130 m |
| Điện áp cung cấp | 1.25 V |
| Number of Drivers/Receivers | 1/1 (Full Duplex) |
| Loại giao diện | Coaxial (single-ended, 50 ohm) |
| Encoding | 8b/10b (downlink) |
| Hộp | 16-QFN (4x4 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| AEC-Q100 Qualification | Qualified |
| CDR Architecture | Reference-less, self-adaptive |
| Trạng thái RoHS | Compliant |
Cấu hình chân EQCO125X40C1-I/8EX
| Chân 1 | SDI_IN — Serial data input from coax (equalizer input) |
| Chân 2 | SDI_OUT — Serial data output to coax (cable driver output) |
| Chân 3 | VDD — 1.25 V core supply |
| Chân 4 | GND — Ground |
| Chân 5 | LOOPBACK — Loopback control / test mode |
| Chân 6 | RESET — Device reset (active low per datasheet) |
| Chân 7 | CONFIG0 — Configuration strap 0 (per datasheet) |
| Chân 8 | CONFIG1 — Configuration strap 1 (per datasheet) |
| Chân 9 | SDO — Status / serial data output for management interface |
| Chân 10 | SDI — Management serial data input |
| Chân 11 | SCLK — Management serial clock |
| Chân 12 | CS — Management chip-select (active low per datasheet) |
| Chân 13 | LOS — Loss-of-signal indicator output |
| Chân 14 | VDDIO — I/O supply reference |
| Chân 15 | NC — Not connected (per datasheet) |
| Chân 16 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
EQCO125X40C1-I/8EX phù hợp cho 6 Áp dụngs: CoaXPress 2.0 Machine-Vision Cameras, Automotive ADAS Camera Links, Broadcast and Surveillance Video Links, Industrial Inspection and AOI Systems, Medical Imaging Endoscopes, Long-Reach PCB Trace Links.
CoaXPress 2.0 Machine-Vision Cameras
The EQCO125X40C1-I/8EX is the reference physical-layer IC for CoaXPress 2.0 machine-vision cameras and frame grabbers because it delivers 12.5 Gbps downlink + 1.25 Gbps uplink asymmetric full-duplex over a single 50 ohm coax. Placed between the camera image sensor serializer output and the coax connector, it equalizes the incoming high-speed signal, recovers the clock with its reference-less CDR, and drives the cleaned signal back onto the cable. This offloads FPGA SERDES resources and supports up to 40 m of Belden 1694A at full speed - the canonical length for factory-floor inspection cells. Pair with an FPGA such as Artix-7 or Kintex-7 that handles the CoaXPress protocol layer above the EQCO.
Được đề xuất
Automotive ADAS Camera Links
The EQCO125X40C1-I/8EX is AEC-Q100 qualified and operates from -40 C to +85 C, making it suitable for ADAS surround-view, rear-view, and driver-monitoring camera links. Its single-coax asymmetric profile replaces heavier multi-conductor LVDS or Ethernet harnesses, reducing cable weight in the vehicle and simplifying the grommet routing through the chassis. The integrated equalizer compensates the insertion loss of automotive-grade coax at 12.5 Gbps, while the reference-less CDR tolerates the temperature-induced jitter of an in-cabin link. Pair with a serializer like the MAX96717 or TI DS90UB953 for the sensor side.
Được đề xuất
Broadcast and Surveillance Video Links
The EQCO125X40C1-I/8EX supports up to 130 m of Belden 1694A at 1.25 Gbps, which covers broadcast studio runs between cameras, switchers, and recorders. The part's integrated equalizer cleans up the signal at the far end without requiring an external repeater, and the same IC is used at both the camera-side and the studio-side, simplifying spare-parts inventory. Its 1.25 V supply and compact 4x4 mm QFN footprint suit space-constrained camera-control-unit (CCU) enclosures where thermal dissipation matters. Pair with an SDI bridge such as the LMH0387 for SDI-over-coax interoperability.
Được đề xuất
Industrial Inspection and AOI Systems
The EQCO125X40C1-I/8EX is used in automated optical inspection (AOI) and 3D laser-line-profiler systems where the camera must be physically separated from the host PC by up to 40 m of factory cabling. Its CoaXPress 2.0 asymmetric profile carries uncompressed pixel data at 12.5 Gbps without compression artifacts that would degrade inspection accuracy. The exposed-pad 16-QFN (4x4) package dissipates the IC's heat through the PCB copper pour, enabling enclosed camera-head designs without active cooling. Pair with a GenICam-compliant frame grabber and an image-sensor module with embedded CoaXPress protocol support.
Được đề xuất
Medical Imaging Endoscopes
The EQCO125X40C1-I/8EX is suitable for medical endoscope and surgical-camera links that require high-resolution uncompressed video over flexible coax inside a sterile drape. The single-coax profile replaces multi-fiber bundles, simplifying the sterilization workflow and reducing the cost of single-use camera heads. The reference-less CDR adapts to varying cable characteristics across batches, and the 12.5 Gbps downlink carries 4K UHD endoscopy streams without compression. Pair with an FPGA-based image-signal-processor (ISP) that handles the white-balance and edge-enhancement pipeline.
Được đề xuất
Long-Reach PCB Trace Links
Beyond coaxial cable, the EQCO125X40C1-I/8EX can drive long PCB trace pairs between modules inside a large chassis - for example, between a sensor board in the front panel and a processor board in the back of an industrial rack. The integrated equalizer compensates the insertion loss of FR-4 traces at 12.5 Gbps, eliminating the need for a dedicated redriver on the backplane. The exposed-pad QFN provides a low-thermal-resistance path for continuous operation. Pair with controlled-impedance 50 ohm stripline routing and adequate via stitching for return-current continuity.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EQCO125X40C1-I/8EX — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | EQCO125X40C1-I/8E | EQCO62X20C1-I/8EX | EQCO125X40C1-I/4EX | EQCO125X40C1-I/2EX | EQCO125X40C1-I/3DW |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 16-QFN (4x4) | 16-QFN (4x4) - same | 16-QFN (4x4) - same | 16-QFN (4x4) - same | 16-QFN (4x4) - same | 16-QFN (4x4) - same |
| Downlink Data Rate | 12.5 Gbps | 12.5 Gbps | 6.25 Gbps (-50%) | 12.5 Gbps | 12.5 Gbps | 12.5 Gbps |
| Uplink Data Rate | 1.25 Gbps | 1.25 Gbps | 1.25 Gbps | 1.25 Gbps | 1.25 Gbps | 1.25 Gbps |
| Supply Voltage | 1.25 V | 1.25 V | 1.25 V | 1.25 V | 1.25 V | 1.25 V |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Integrated Functions | Equalizer + CDR + Cable Driver | Equalizer + CDR + Cable Driver | Equalizer + CDR + Cable Driver | Equalizer + CDR + Cable Driver | Equalizer + CDR + Cable Driver | Equalizer + CDR + Cable Driver |
Bảo phân biệt quan trọng
- Highest single-coax downlink rate in the EQCO125X40 family (vsEQCO62X20C1-I/8EX)
- Integrated equalizer + reference-less CDR + cable driver (vsDiscrete equalizer + external CDR + cable driver solution)
- Same chip at both ends of the coax link (vsAsymmetric PHY pairs (camera-only vs host-only ICs))
Ghi chú thiết kế
Route the 50 ohm coaxial interface as a controlled-impedance transmission line (stripline or microstrip) directly from the EQCO125X40C1-I/8EX SDI_IN/SDI_OUT pins to the coax connector. Keep the trace length below 5 mm and avoid stubs; use ground stitching vias every lambda/10 along the trace to maintain return-current continuity. Per the Microchip EQCO125X40 family datasheet layout guidelines, mismatched impedance will degrade the equalizer's eye-opening at 12.5 Gbps.
Estimated: at 1.25 V supply and typical 200 mA operating current, the EQCO125X40C1-I/8EX dissipates approximately 0.25 W. Provide at least one 0.1 uF X7R ceramic decoupling capacitor as close as possible to the VDD pin, plus a 10 uF bulk capacitor within 5 mm. Place a ferrite bead on the supply rail if the upstream regulator is a switching converter to keep CDR jitter within spec.
Do not substitute the EQCO125X40C1-I/8EX with the /3DW suffix variant on a QFN PCB footprint without verifying pinout - the /3DW is a die-pedestal package code with potentially different mechanical attachment. Also ensure the CONFIG0/CONFIG1 strap pins are tied to the correct logic levels per datasheet Table 1; incorrect strapping disables the CDR and yields a non-functional link. Always terminate unused NC pins (do not connect to VDD/GND).
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. AEC-Q100 qualified per EQCO125X40 family datasheet - suitable for automotive camera applications.
