SY89828LHY - 1GHz Dual LVDS Fanout Buffer | Microchip
N.º da peça: SY89828LHY ✓ AtivoSY89828LHY Visão geral
A clock fanout buffer is a clock-management IC that reproduces one input signal across several outputs. The SY89828LHY belongs to the clock buffer and clock distribution hierarchy, where low-skew fanout helps preserve timing relationships among high-speed digital circuits. Its differential LVDS interface is designed for 3.3 V systems in which numerous destinations must receive coherent signals over controlled low-voltage differential connections.
The principal feature is the combination of two 1:10 fanout paths and a 2:1 input multiplexer. According to the manufacturer product description, the part provides twenty differential LVDS output pairs, allowing a compact architecture to distribute clocks across as many as twenty receiver locations. A maximum operating frequency of 1 GHz supports demanding clock-routing requirements while the dual fanout structure reduces the number of separate clock-distribution devices required.
The SY89828LHY also functions as an LVDS translator, allowing the buffered signals to be redistributed using the differential signaling format. This combination is useful when one source must feed multiple subsystems whose clocks must remain aligned. The exposed pad in the 64-pin TQFP package provides the primary thermal path for this high-output-count, 1 GHz device, making careful PCB thermal design important.
Typical applications include communication equipment, parallel processing systems, test and measurement instrumentation, server or storage clock distribution, and high-speed backplane interfaces. It is particularly relevant where a single differential clock must reach many endpoints without introducing excessive skew between output pairs. System architects can select the active input through the multiplexer and distribute the selected clock across the available LVDS outputs.
Layout should use controlled-impedance LVDS routing, symmetrical differential pairs, solid ground-plane continuity, and the exposed pad connected to a low-impedance thermal plane. Decoupling capacitors should be placed close to the supply and ground pins. Because this is a high-speed, high-output-count clock device, connector transitions, unequal pair lengths, and return-path discontinuities can degrade timing and signal integrity even when the nominal clock frequency remains below 1 GHz.
This page combines the manufacturer’s device description, verified distributor identification, package details, application-oriented engineering guidance, and replacement availability analysis. It also distinguishes the core SY89828LHY function from the broader clock-buffer category and highlights design decisions that matter when distributing 1 GHz LVDS clocks across many destinations.
Alternativas drop-in para SY89828LHY — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasSY89828LHY Especificações
| Product Type | Clock fanout buffer, multiplexer, and translator IC |
| Tensão de alimentação | 3.3 V |
| Maximum Operating Frequency | 1 GHz |
| Fanout Configuration | Dual 1:10 |
| Input Multiplexer Configuration | 2:1 |
| Differential Output Count | 20 LVDS output pairs |
| Input Configuration | 4 differential inputs |
| Logic Standard | LVDS |
| Encapsulamento | 64-pin TQFP with exposed pad |
| Tipo de montagem | Surface mount |
| Status RoHS | Compliant |
Guia de Configuração de Pinos do SY89828LHY 64-pin tqfp with exposed pad
Configuração de pinos para SY89828LHY (pacote 64-pin tqfp with exposed pad). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para SY89828LHY.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
SY89828LHY é adequado para 6 aplicaçãos: Parallel Backplane Clock Distribution, Telecommunications Clock Distribution, Server and Storage Clock Trees, High-Speed Test and Measurement, High-Speed Data Acquisition, Industrial Parallel Processing.
Parallel Backplane Clock Distribution
The SY89828LHY fits parallel backplane designs that must deliver a selected differential clock to many destinations while maintaining tightly related output timing. Its two 1:10 fanout paths provide twenty differential LVDS output pairs, and the 2:1 input multiplexer permits selection between two clock sources. At rates up to 1 GHz, the device is relevant to high-speed processing, switching, and test electronics. The PCB should use controlled-impedance differential routing, matched geometry, continuous ground references, and short connections from the clock source. Because twenty output channels increase total trace and receiver loading, engineers should verify the complete interconnect budget rather than treating the nominal 1 GHz specification as a guaranteed system-level frequency.
Telecommunications Clock Distribution
Telecommunications equipment can use the SY89828LHY to distribute a 3.3 V differential clock across multiple line cards, converters, or digital processing sections. Twenty differential LVDS output pairs reduce the number of separate fanout components, while the 2:1 multiplexer supports clock-source selection or failover routing. The 1 GHz maximum operating frequency makes the device applicable to high-rate digital infrastructure. Layout quality remains decisive: route each LVDS pair with continuous reference planes, avoid impedance discontinuities, and keep power and ground paths low-impedance. System timing should be evaluated with the actual receiver thresholds, cable or connector loading, and jitter requirement rather than only the IC operating frequency.
Server and Storage Clock Trees
The SY89828LHY is suitable for server, storage, and parallel-computing clock trees that need one selected source distributed to a large number of LVDS-capable endpoints. Its dual 1:10 architecture supplies twenty differential output pairs, reducing clock-branch complexity and conserving board area compared with many discrete fanout devices. The 3.3 V operating rail and 1 GHz maximum frequency align with demanding digital clocking requirements. Thermal and signal-integrity planning should occur together because the 64-pin exposed-pad package must dissipate device heat while maintaining a low-inductance return path. Validate receiver loading, jitter accumulation, trace skew, and power-plane integrity in prototype measurements before production release.
High-Speed Test and Measurement
The SY89828LHY can organize a compact test-and-measurement clock tree by feeding many acquisition, conversion, or synchronization circuits from two selectable differential sources. Twenty LVDS output pairs provide broad distribution without requiring twenty independent buffer packages, and the 1 GHz capability supports fast instrumentation interfaces. For bench and production test systems, deterministic skew and repeatable routing are important, so differential pair geometry, reference-plane continuity, and connector transitions require careful control. Power supplies should provide clean 3.3 V power with local high-frequency decoupling, while the exposed pad should connect to a robust thermal and ground structure according to the manufacturer package guidance.
High-Speed Data Acquisition
In multi-channel data-acquisition systems, the SY89828LHY can distribute a common sampling or trigger clock across converter banks while preserving alignment between channels. The dual 1:10 fanout provides twenty differential LVDS destinations, and the 2:1 multiplexer allows two clock sources to share the same distribution network. This architecture is useful when many converters require a common reference and cable or board losses must be controlled through differential signaling. The 1 GHz maximum operating frequency supports demanding conversion-clock rates, provided the actual channel bandwidth and receiver tolerances are suitable. Engineers should verify inter-channel skew, clock jitter, supply-noise rejection, and edge quality at each endpoint using realistic loading conditions.
Industrial Parallel Processing
The SY89828LHY suits industrial parallel-processing modules in which one precision clock must reach many processors, transceivers, or data-conversion circuits. Twenty differential LVDS outputs allow the clock network to scale across multiple boards or channels, while the input mux provides source flexibility. Its 3.3 V operation and 1 GHz maximum frequency suit high-speed digital logic, but industrial thermal conditions still require validation against the device’s specified operating limits. Robust implementation includes short decoupling paths, uninterrupted ground planes, controlled-impedance routing, and adequate thermal-via density under the exposed pad. Avoid adding test stubs or long branch structures that can increase reflections, edge degradation, and timing uncertainty across the distribution network.
Dados de referência de engenharia para SY89828LHY — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Notas de projeto
Route every output as a controlled-impedance differential pair with symmetric geometry and a continuous ground reference. Avoid stubs, test pads, and unnecessary layer transitions that can reflect clock energy into the output pairs. Keep the SY89828LHY clock outputs away from noisy switching nodes and route the input pair with equivalent discipline. When several destinations share a board, preserve symmetry and account for connector or via transitions in the channel simulation.
The 64-pin TQFP exposed pad is the principal thermal path for this 1 GHz device with twenty LVDS outputs. Connect the pad to the designated ground reference with multiple low-impedance vias and preserve copper area beneath the package. Confirm the final junction-temperature margin using the actual board stack-up, copper geometry, airflow, and nearby heat sources. Do not place thermal-via structures in a way that breaks return paths beneath sensitive differential clock routes.
Place high-frequency decoupling capacitors immediately across the device power and ground pins and provide a low-impedance local supply connection. Clock outputs switching across many channels can produce simultaneous current activity, so separate the supply distribution path from sensitive input routing. Review the 3.3 V rail for adequate transient response at the device and verify that the selected input source supplies clean edges. Keep the ground plane continuous so return current has a direct path beneath each differential pair.
Informações de conformidade
RoHS compliance is identified in the online component listing for SY89828LHY. No verified information is available for REACH, AEC-Q100 qualification, lead-free status, halogen-free status, or conflict-minerals compliance.
