SY89831UMG - 1:4 2 GHz LVPECL Fanout Buffer | Microchip
料号： SY89831UMG ✓ 量产中SY89831UMG 概述
A fanout buffer is a clock and timing IC that receives one input signal and reproduces it across multiple outputs. Clock buffers help isolate source and load circuits, distribute a common reference to multiple destinations, and maintain signal timing across a system. The SY89831UMG belongs to the clock-buffer and clock-driver hierarchy within logic and timing integrated circuits.
The principal device characteristics are a 1:4 fanout ratio, 2 GHz maximum frequency, LVPECL output, and support for CML, LVDS, and LVPECL input formats. These features allow one high-speed clock source to feed four compatible destinations while accommodating mixed logic families. The device also includes internal termination, which can simplify source-network implementation when correctly matched to the intended transmission-line environment.
Because the SY89831UMG is a fanout buffer and translator, its primary role is signal distribution rather than frequency generation. It is suited to telecommunications equipment, servers, network interfaces, test and measurement systems, and other designs where a low-jitter clock must be distributed to several high-speed circuits. The four LVPECL outputs are intended to preserve edge-rate and timing quality across the fanout network.
The 16-VFQFN exposed-pad package supports compact surface-mount layouts and provides a thermal path through its exposed pad. PCB implementation must follow the manufacturer’s recommended land pattern and decoupling arrangement. Differential trace routing, controlled impedance, adequate grounding, and correct termination are essential for reliable behavior at the device’s 2 GHz upper frequency.
Before finalizing a circuit, confirm input amplitude, output termination, supply voltage, trace geometry, and the pin-specific recommendations in the manufacturer datasheet. This page consolidates the confirmed operating specifications, sourcing information, application guidance, and design cautions for engineers evaluating the SY89831UMG.
直接替换替代料： SY89831UMG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料SY89831UMG 规格参数
| Device Type | Clock fanout buffer and translator |
| Fanout Ratio | 1:4 |
| Maximum Frequency | 2 GHz |
| Input Logic Levels | CML, LVDS, LVPECL |
| Output Logic Level | LVPECL |
| Supply Voltage Options | 2.5 V or 3.3 V |
| Internal Termination | Included |
| 输出数量 | 4 |
| 封装 | 16-VFQFN with exposed pad |
| Package Designation | 16-MLF |
| 安装类型 | Surface mount |
| Manufacturer | Microchip Technology |
| Series | SY89831 |
SY89831UMG 16-mlf 引脚配置指南
SY89831UMG（16-mlf 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SY89831UMG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SY89831UMG 适用于 6 应用s: Telecommunications Clock Fanout, Server and Network-Interface Clock Distribution, High-Speed Test and Measurement Equipment, Optical and High-Speed Communication Modules, Industrial Data-Acquisition Systems, Clock Synthesis and PLL Output Branching.
Telecommunications Clock Fanout
The SY89831UMG fits telecommunications clock trees that need one high-speed source distributed to four receiving circuits. Its 1:4 fanout ratio provides a compact branching point, while support for CML, LVDS, and LVPECL inputs allows the device to accept several common high-speed source formats and present LVPECL outputs. The 2 GHz maximum frequency supports high-speed fabric, transceiver, and line-card clocking. Place the device near the clock branch, route each differential output as a controlled-impedance pair, and confirm the input and output termination configuration from the manufacturer datasheet.
推荐
Server and Network-Interface Clock Distribution
The SY89831UMG can distribute a common reference clock to four server, network-interface, or data-conversion blocks without placing four loads directly on the source. Its four LVPECL outputs and 2 GHz upper frequency are appropriate for high-speed backplane and transceiver environments, while the 16-VFQFN exposed-pad package conserves board area. Keep the source connection short, maintain consistent differential impedance across all four branches, and use the exposed pad as a thermal and ground feature according to the recommended footprint.
推荐
High-Speed Test and Measurement Equipment
In test and measurement systems, the SY89831UMG can replicate a reference clock to four instrument, converter, or acquisition channels while supporting LVPECL output signaling. The 2 GHz capability makes it relevant to high-speed sampling and trigger-distribution architectures, and its translator function helps interface CML, LVDS, or LVPECL sources. Control differential trace length, avoid stubs, use suitable ground references, and verify receiver thresholds and clock-jitter budgets in the completed instrument.
推荐
Optical and High-Speed Communication Modules
The SY89831UMG is suitable for parallel high-speed communication modules that need four LVPECL clock outputs from one reference. The input translator can accept common high-speed logic formats, making it useful near serializers, transceivers, or optical-module control blocks. The compact 16-VFQFN package supports constrained board layouts, although its 2 GHz rating still requires disciplined transmission-line routing. Validate amplitude, rise time, jitter, and termination across temperature before using the four outputs to drive sensitive optical or digital circuits.
推荐
Industrial Data-Acquisition Systems
The SY89831UMG can fan a sampling or conversion clock into four acquisition lanes within an industrial data-acquisition system. Its LVPECL outputs suit high-speed digital converters and logic devices, while input-level flexibility helps bridge several clock-source conventions. The 2 GHz maximum frequency provides margin for demanding sampling architectures, and the small exposed-pad package simplifies placement near converter banks. Use matched differential routing, local bypassing, and solid grounding to limit timing degradation across all four branches.
推荐
Clock Synthesis and PLL Output Branching
The SY89831UMG can serve as the final branching stage after a PLL or oscillator when a synthesized clock must reach four LVPECL loads. Fanout can isolate the oscillator from downstream loading and provide four independently routed clock branches while preserving the 2 GHz operating capability. The source and receivers must remain compatible with the device’s logic thresholds and termination arrangement. Route away from noisy power stages, keep each pair matched, and compare clock phase and jitter at the far end of every branch.
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推荐产品汇总
工程参考数据： SY89831UMG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Brand | Microchip Technology |
| Package | 16-VFQFN with exposed pad |
| Device Type | Clock fanout buffer and translator |
| Fanout Ratio | 1:4 |
| Maximum Frequency | 2 GHz |
| Input Logic Levels | CML, LVDS, LVPECL |
| Output Logic Level | LVPECL |
| Supply Voltage Options | 2.5 V or 3.3 V |
| Internal Termination | Included |
设计说明
Route the input and all four LVPECL output pairs as short, controlled-impedance differential traces. Keep branch lengths matched where timing alignment matters, maintain a continuous ground reference under each pair, and avoid test pads, vias, or stubs that create reflections. At the 2 GHz upper limit, connector launches and breakout structures should be modeled as transmission-line elements rather than ideal wires.
Use the manufacturer land pattern for the 16-VFQFN exposed pad, including its solder-mask opening and thermal-via arrangement. Verify pin-one orientation before routing because the package has closely spaced high-speed pins. Place bypass capacitors close to the supply and ground pins and provide a low-impedance connection from the exposed pad to the ground plane. Follow the datasheet’s thermal-via count and spacing to avoid assembly voiding.
Confirm the correct use of the internal termination for the intended source and transmission-line topology; do not add redundant termination that doubles the load. Check input amplitude and output swing against receiver thresholds, and verify the supported supply condition of 2.5 V or 3.3 V. Measure rise time, overshoot, ringing, and differential voltage at the far end of the longest branch before production release.
合规信息
Compliance declarations are not stated in the available product excerpts. Confirm the current RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification status for the exact ordering suffix with the manufacturer.
