SY89829UHY - 2 GHz Dual LVPECL Clock Driver | Microchip
部品番号: SY89829UHY ✓ 生産中SY89829UHY 概要
A clock driver is a specialized digital IC within the clock and timing hierarchy. It receives a reference clock, provides the electrical drive required by transmission lines, and fans that clock across multiple receivers. LVPECL clock drivers use differential positive-referenced emitter-coupled logic to support high-speed point-to-point links. The SY89829UHY combines this differential clock distribution function with multiplexing, internal termination, and redundant switchover in one device.
The device can operate as a dual 1:10 fanout buffer or translator or as a single 1:20 arrangement. It accepts LVPECL or LVDS inputs, and its differential architecture is intended for systems requiring aligned outputs and controlled skew. The manufacturer identifies a maximum pin-to-pin skew of 50 ps and maximum part-to-part skew of 200 ps. Internal termination reduces the need for separate input matching components when the associated board-level network requires it.
Redundant switchover gives the system two input paths and allows clock-source redundancy without implementing the multiplexing and fanout functions in separate ICs. This architecture can simplify board partitioning in telecom, networking, test equipment, and data-processing platforms. Compared with discrete clock trees, one integrated driver reduces device count, keeps the clock distribution topology centralized, and makes skew control easier to characterize across the complete output network.
Typical uses include line-card clock distribution, redundant clock switching in communication equipment, synchronized backplane systems, high-speed test and measurement platforms, and parallel processing systems. At 2 GHz maximum operating frequency, the device is suited to demanding systems, but signal integrity still depends on correct source termination, controlled-impedance routing, appropriate return paths, and compliance with the layout guidance in the manufacturer datasheet.
A critical design consideration is the exposed-pad thermal and return-path arrangement. Place the exposed pad on a solid ground plane with short thermal vias and preserve the high-speed differential topology recommended for the package. Account for power-supply noise, input common-mode behavior, output loading, and receiver termination when establishing the system clock budget.
This page combines the manufacturer specifications, package details, sourcing structure, design guidance, and documented replacement information for engineers evaluating the SY89829UHY as a high-output-count LVPECL clock-distribution solution.
ドロップイン代替品: SY89829UHY — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
SY89829UHI
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SY89829UHY 仕様
| Product Type | Dual 1:10 or single 1:20 LVPECL clock driver and fanout buffer |
| 電源電圧 | 2.5 V or 3.3 V |
| Maximum Operating Frequency | 2 GHz |
| Fanout Configuration | Dual 1:10 or single 1:20 |
| 出力数 | 20 outputs |
| Input Signal Standards | LVPECL or LVDS |
| Output Signal Standard | LVPECL |
| Maximum Pin-to-Pin Skew | 50 ps |
| Maximum Part-to-Part Skew | 200 ps |
| Input Termination | Internal termination |
| Input Multiplexing | Multiplexed redundant input switchover |
| パッケージ | 64-pin TQFP with exposed pad |
| 実装タイプ | Surface mount |
| Document Length | 10 pages |
SY89829UHY 64-pin tqfp with exposed pad ピン配置ガイド
SY89829UHY (64-pin tqfp with exposed pad パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: SY89829UHY.
詳細は データシート をご参照ください。
主な用途
SY89829UHY の用途: 6 件s: Telecom Line-Card Clock Distribution, Networking and Backplane Clocking, Redundant Clock Switching, High-Speed Test and Measurement Equipment, Parallel Computing and Processor Systems, Industrial Control and Data Acquisition.
Telecom Line-Card Clock Distribution
The SY89829UHY fits telecom line-card designs that must distribute a high-speed reference to numerous physical-layer and data-processing sections. Its dual 1:10 or single 1:20 configuration can provide 20 LVPECL outputs, while the 2 GHz maximum operating frequency supports demanding serial interfaces. The 50 ps maximum pin-to-pin skew provides a useful alignment target across channels. Redundant switchover adds clock-source resilience without requiring a separate multiplexing stage. Place the device near the clock fanout region, route outputs as controlled-impedance differential pairs, and connect the exposed pad to a continuous ground structure with short thermal vias.
おすすめ
Networking and Backplane Clocking
The SY89829UHY is suitable for networking and backplane systems where one reference clock must feed multiple line cards, buffers, transceivers, or fabric devices. Twenty LVPECL outputs reduce clock-tree complexity and help keep the distribution point physically close to the receivers. The maximum part-to-part skew of 200 ps and pin-to-pin skew of 50 ps establish useful system budgeting limits. Differential routing and a continuous reference plane are essential at 2 GHz. Verify receiver termination and input common-mode requirements against the manufacturer circuit examples before layout release.
おすすめ
Redundant Clock Switching
The integrated redundant switchover makes the SY89829UHY appropriate for systems that cannot tolerate loss of their primary clock source. Two input paths can be multiplexed while the same device supplies up to 20 outputs, reducing the number of separate switching and fanout components. This arrangement is useful in instrumentation, industrial controllers, and communication equipment with dual oscillator or recovered-clock sources. Designers should define the default input state and transition behavior in system firmware or control logic. Signal traces must remain impedance controlled, and input termination must match the selected operating mode described in the manufacturer datasheet.
おすすめ
High-Speed Test and Measurement Equipment
The SY89829UHY can supply aligned reference clocks to parallel ADC, DAC, digitizer, or generator sections within high-speed test equipment. Its 20-output capability supports distributed instrumentation modules while limiting clock-routing branch complexity. Operation up to 2 GHz and maximum pin-to-pin skew of 50 ps provide suitable characteristics for precision timing architectures. The device is especially valuable when the reference must fan out to many channels with repeatable placement. Use short differential routes, maintain a continuous reference plane, decouple the supply near the package, and validate source and receiver terminations during signal-integrity analysis.
おすすめ
Parallel Computing and Processor Systems
The SY89829UHY fits parallel-computing systems that require a common reference clock across multiple processors, accelerators, serializers, or memory interfaces. Configuring the device for single 1:20 operation provides twenty outputs, while dual 1:10 operation supports two independent one-to-ten branches. The 50 ps pin-to-pin skew specification helps constrain relative clock arrival times across nearby channels. Placement should minimize distance between the driver and receiver banks without compromising impedance continuity. Validate power sequencing, input logic thresholds, and clock-enable behavior for the complete system rather than relying only on nominal frequency capability.
おすすめ
Industrial Control and Data Acquisition
The SY89829UHY is appropriate for industrial control and data-acquisition platforms with several high-speed converters, communication interfaces, or timing-critical processing blocks. Twenty outputs allow one clock component to replace a network of smaller buffers while preserving a defined skew budget. The redundant input switchover can support dual internal or external clock sources for controlled transition between operating states. The exposed pad requires a solid ground-plane connection and adequate thermal via placement. Confirm operating-temperature requirements, supply sequencing, and input configuration for each industrial system before approving the device for production.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: SY89829UHY — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | SY89829UHI |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP with exposed pad | 64-pin TQFP with exposed pad - same |
主な差別化要因
- Provides 20 outputs from one clock-distribution device （vs SY89829UHI)
- Combines dual fanout, redundant switchover, and internal termination （vs SY89829UHI)
- Provides controlled skew for multi-channel clock distribution （vs SY89829UHI)
設計ノート
Treat every LVPECL and LVDS route as a controlled-impedance differential pair with a continuous reference plane. Keep branches short, avoid stubs and test pads where practical, and do not route the clock signals across the exposed-pad region. The 2 GHz maximum frequency makes trace geometry, return-path continuity, and receiver loading central to reliable operation.
Connect the 64-pin TQFP exposed pad to the ground plane using multiple short thermal vias and avoid interrupting the plane with split or segmented pours. Keep the driver near the clock-consuming circuitry to reduce trace length. Use the manufacturer's package and layout guidance for exposed-pad construction so the package can transfer heat while also preserving the high-speed return path.
Confirm the selected fanout mode, input signal standard, termination arrangement, and switchover state before release. A 2 GHz operating limit does not guarantee acceptable operation if a receiver, trace, connector, or termination introduces bandwidth loss. Validate the complete clock path with signal-integrity analysis and verify that the exposed-pad ground connection does not create an undesirable return discontinuity.
Build the clock budget from the documented 50 ps maximum pin-to-pin skew and 200 ps maximum part-to-part skew rather than assuming zero channel-to-channel offset. Include receiver tolerance, input skew, interconnect delay, and switching jitter when allocating timing margin. Keep the redundant inputs equally characterized so a switchover does not introduce an unplanned phase discontinuity.
コンプライアンス情報
The manufacturer datasheet identifies the SY89829U family and package characteristics, but the available material does not establish the requested environmental or automotive compliance declarations.
