SY87721LHY - 2.7GHz Clock/Data Recovery IC | Microchip
Артикул: SY87721LHY ✓ АктивенSY87721LHY Обзор
A clock and data recovery IC, or CDR, is a timing IC that extracts or reconstructs a serial data stream and aligns it with a recovered or multiplied clock. Within the clock and timing hierarchy, the SY87721LHY belongs to the application-specific clock/timing category and supports Ethernet, SONET/SDH, and ATM equipment. Its integrated clock multiplier allows the recovered timing information to be reused within high-speed line-card and network-interface designs.
Key characteristics include a 3.15 V to 3.45 V supply range, support for data rates from 28 Mbps through 2.7 Gbps, one clock or recovered-data output, and CML or PECL-compatible output signaling. The listed operating-temperature range is -40°C to 85°C, allowing use across industrial temperature grades while maintaining the high-speed timing performance required by serial links.
The SY87721LHY integrates clock and data recovery with a clock multiplier in one package. This consolidation can reduce the number of separate timing components required in a communications design. At the upper end of its stated range, its 2.7 GHz capability addresses demanding SONET/SDH and related network transmission systems, while the lower 28 Mbps rate supports lower-speed recovered-clock interfaces.
Typical applications include Ethernet line cards, SONET/SDH transport equipment, ATM networking systems, optical-network interface assemblies, serial backplanes, and high-speed clock-distribution subsystems. The exposed-pad TQFP package also provides a thermal path to the PCB, which is important when high-speed devices dissipate power in compact communications hardware.
Design the power supply and decoupling network for the specified 3.15 V to 3.45 V range, and confirm that the PCB accommodates the exposed thermal pad. Use the manufacturer pin-description and reference-layout information when assigning high-speed inputs and outputs because trace length, return paths, and decoupling placement can materially affect signal integrity.
This page organizes the SY87721LHY's core timing specifications, packaging, application guidance, and sourcing information. It also distinguishes verified device characteristics from parameters that require direct confirmation from the manufacturer datasheet, helping engineers plan a new design or assess an existing PCB revision.
Аналоги без доработки для SY87721LHY — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Для этого товара нет аналогов без доработки.
Запросить аналогиSY87721LHY Характеристики
| Product Type | Application-specific clock and data recovery IC |
| Maximum Operating Frequency | 2.7 GHz |
| Minimum Data Rate | 28 Mbps |
| Maximum Data Rate | 2.7 Gbps |
| Supply Voltage Range | 3.15 V to 3.45 V |
| Output Count | 1 output |
| Output Signal Type | CML or PECL |
| Clock Multiplier | Integrated |
| Диапазон рабочих температур | -40°C to +85°C |
| Корпус | 64-TQFP with exposed pad |
| Package Dimensions | 10 mm × 10 mm |
| Тип монтажа | Surface mount |
| Ethernet Support | Supported |
| SONET/SDH Support | Supported |
| ATM Support | Supported |
Руководство по цоколевке SY87721LHY в корпусе 10 mm × 10 mm
Цоколевка для SY87721LHY (корпус 10 mm × 10 mm). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для SY87721LHY.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
SY87721LHY подходит для 6 применениеs: Ethernet Line-Card Clock Recovery, SONET/SDH Transport Equipment, ATM Network Interface Cards, Optical Network Interface Assemblies, High-Speed Serial Backplanes, Industrial Timing-Control Systems.
Ethernet Line-Card Clock Recovery
The SY87721LHY fits Ethernet line-card designs that require a recovered timing reference from a high-speed serial stream. Its 28 Mbps-to-2.7 Gbps operating range covers multiple generations of network transport, while the integrated clock multiplier and single output can simplify clock distribution where one recovered or multiplied clock is required. The device operates from 3.15 V to 3.45 V, making it suitable for conventional 3.3 V communications boards. Designers should place bypass capacitance near the supply pins, provide a low-impedance ground reference, and follow the manufacturer layout for the 64-pin TQFP exposed pad. The recovered-clock frequency and channel encoding must be checked against the PHY, serializer, and optical interface to confirm that the single-output architecture matches the system timing plan.
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SONET/SDH Transport Equipment
The SY87721LHY is suitable for SONET/SDH transport equipment that needs high-speed clock and data recovery. Its maximum 2.7 GHz operating frequency addresses demanding line-rate timing functions, while the 3.15 V to 3.45 V supply range supports standard communications voltage rails. The integrated clock multiplier can provide useful timing support in line cards, mux-demux subsystems, and backplane interfaces that require a stable clock derived from recovered data. For implementation, engineers should verify the supported line rate, reference-clock relationship, output level, and jitter requirements against the specific optical or electrical transport path. High-speed traces require controlled impedance, short return paths, and placement of the exposed thermal pad directly into the PCB copper plane for reliable thermal performance.
Рекомендуется
ATM Network Interface Cards
The SY87721LHY can support ATM network interface assemblies that require recovery of clock and data from a transmitted bitstream. The device's stated 28 Mbps-to-2.7 Gbps range spans low-speed access links and substantially faster network interfaces, making it adaptable to different ATM transport rates. Its one-output configuration should be selected only when the board architecture requires one recovered or multiplied timing signal. The 3.15 V to 3.45 V operating range requires a regulated supply within those limits, and the -40°C to +85°C rating supports industrial-temperature implementations. Board designers should use the manufacturer reference layout, account for exposed-pad soldering, and validate channel jitter, data polarity, and clock-ratio settings before production release.
Рекомендуется
Optical Network Interface Assemblies
The SY87721LHY fits optical-network interface assemblies where serial data must be aligned with a recovered clock before processing. Its integrated clock multiplier can reduce the timing-component count compared with a design using separate recovery and multiplication functions. Operating up to 2.7 GHz and using CML or PECL-compatible outputs, the IC is appropriate for high-speed optical-module and line-card signal paths when the required output standard matches the downstream receiver. The 64-pin TQFP exposed-pad package supports compact surface-mount construction, but thermal design remains important in sealed or high-density assemblies. Use the manufacturer reference layout for differential routing and power distribution, and validate output termination, clock ratio, and propagation-delay requirements against the optical transceiver architecture.
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High-Speed Serial Backplanes
The SY87721LHY is applicable to high-speed serial backplanes that distribute recovered timing across a communications chassis. Its 28 Mbps-to-2.7 Gbps range covers a broad set of legacy and high-speed links, while the integrated clock multiplier supports systems that derive an additional clock relationship from the recovered stream. The device requires a 3.15 V to 3.45 V rail and provides one output, so system partitioning must account for the number of fan-out paths and any additional distribution stages required. Signal-integrity work should include controlled-impedance routing, continuous reference planes, minimized stubs, and separate high-frequency return paths. Confirm that the recovered clock meets the receivers' jitter and timing-budget limits before using the IC as a central backplane timing source.
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Industrial Timing-Control Systems
The SY87721LHY's -40°C to +85°C operating range makes it suitable for industrial timing-control and process-equipment electronics that must recover clock and data from a high-speed link. Its single-output CDR architecture can reduce component count in compact control modules, provided the required recovery bandwidth and clock ratio are supported. The 3.15 V to 3.45 V supply range is compatible with a regulated 3.3 V rail, but industrial systems still need careful filtering, grounding, and fault analysis. Use the manufacturer's recommended land pattern to solder the exposed thermal pad and provide adequate copper for heat spreading. For production designs, qualify the full signal path over temperature, validate clock jitter under worst-case loading, and confirm that the one-output arrangement leaves no additional timing path unserved.
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Сводка рекомендуемых товаров
Справочные инженерные данные для SY87721LHY — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Заметки по проектированию
Design the SY87721LHY supply rail inside the specified 3.15 V to 3.45 V range and preserve low impedance from the regulator to the device. Place bulk and high-frequency decoupling capacitors close to the supply and ground pins using the manufacturer reference layout. Keep switching-converter and high-current return paths away from clock and data traces to minimize supply-induced timing noise.
The 64-pin TQFP exposed pad is the primary thermal path. Create the land pattern with the manufacturer's recommended copper and solder geometry, connect the pad to the ground plane, and avoid thermal voids under the package. For high ambient temperatures, estimate package dissipation and temperature rise from the final board construction, then increase copper area or add thermal relief if the application requires additional margin.
Use controlled-impedance routing for high-speed inputs and outputs, maintain a continuous reference plane, and keep the recovered-clock path as short as practical. Follow the manufacturer layout guidance for decoupling, input/output spacing, and exposed-pad connection. Avoid stubs and unnecessary vias because they can increase reflections and degrade the timing margin of a 2.7 GHz-capable CDR.
Do not select SY87721LHY solely from its 2.7 GHz headline frequency. Confirm the supported recovery range, required clock ratio, output signaling format, reference-clock arrangement, and pin mapping for the specific channel. The device has one output, so designs needing multiple recovered or multiplied clocks require additional distribution circuitry and timing-budget verification.
Информация о соответствии
The device listing identifies an industrial-temperature range of -40°C to +85°C, but it does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Confirm these declarations with Microchip Technology before applying them to procurement or qualification requirements.
