SY89113UMY - 1:12 LVDS Clock Fanout Buffer | Microchip
料号： SY89113UMY ✓ 量产中SY89113UMY 概述
A clock fanout buffer is a digital interface device that reproduces one input clock to multiple outputs while preserving signal timing relationships. The SY89113UMY belongs to the clock-buffer hierarchy, combining clock distribution, a 2:1 multiplexer, differential LVDS I/O, and internal input termination in one device. These functions are useful when a system must route a clock locally, isolate multiple destinations, or support redundant clock-source selection.
The device provides a 1:12 fanout ratio, a 2:1 input multiplexer, and operation up to 1 GHz. Differential LVDS clocking reduces sensitivity to noise compared with single-ended distribution when the circuit is implemented with controlled impedance, short traces, and appropriate termination. The input mux permits a design to select between two clock sources, while the 12 outputs can feed multiple destination circuits from a common distribution point.
The SY89113UMY operates from a 2.5 V supply, making it suitable for systems using a dedicated 2.5 V clock domain. Its specified low-jitter and low-skew characteristics are particularly relevant to communication, server, and test systems where timing consistency between distributed clocks affects data integrity, sampling margins, and clock-domain reliability.
Typical uses include server backplane clock distribution, telecommunications equipment clock routing, high-speed backplane fanout, and test-and-measurement systems requiring selectable clock sources. In a switchover design, the two mux inputs can be driven by redundant clocks, with the selected source distributed to 12 endpoints. The exposed-pad package also provides a direct thermal path when the device operates in a high-density system.
PCB implementation requires careful attention to differential impedance, return paths, input termination, and output routing. Place the decoupling capacitor close to the supply pin, connect the exposed pad to the appropriate ground plane using the manufacturer’s thermal and layout guidance, and avoid adding excessive stubs to clock outputs. The full pin assignment and layout guidance should be taken from the pin-description table and application diagrams in the manufacturer datasheet.
This page combines the device’s stated architecture and operating characteristics with package details, sourcing guidance, drop-in replacement analysis, comparison parameters, and practical implementation notes. It is intended to help engineers determine where the SY89113UMY fits in a clock-distribution design and which compatibility checks must be completed before substituting another part.
直接替换替代料： SY89113UMY ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
SY89113U
✅ 直接替换📋 参考替代料（不在目录中）
SY89113UMY 规格参数
| Product Type | 1:12 LVDS clock fanout buffer with 2:1 input multiplexer |
| Input Multiplexer Ratio | 2:1 |
| Clock Fanout Ratio | 1:12 |
| 最大时钟频率 | 1 GHz |
| 电源电压 | 2.5 V |
| 工作温度 | -40 °C to +85 °C |
| Output Logic | LVDS differential |
| Number of Clock Outputs | 12 |
| Number of Multiplexed Clock Inputs | 2 |
| Internal Input Termination | Yes |
| 封装 | 44-VFQFN exposed pad, 44-MLF |
| 安装类型 | Surface mount |
SY89113UMY 44-vfqfn exposed pad, 44-mlf 引脚配置指南
SY89113UMY（44-vfqfn exposed pad, 44-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： SY89113UMY.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SY89113UMY 适用于 6 应用s: Enterprise Server Clock Distribution, Telecommunications Clock Routing, High-Speed Backplane Fanout, Redundant Clock Source Switchover, Test and Measurement Instrumentation, Industrial Synchronization Networks.
Enterprise Server Clock Distribution
The SY89113UMY fits enterprise-server clock distribution because it provides a 1:12 fanout ratio, operation up to 1 GHz, and differential LVDS outputs in one 2.5 V device. The two selectable inputs can support source-switchover architectures, while internal input termination reduces the number of external network elements. In a backplane or rack-level design, 12 outputs can feed multiple destination circuits from a common source. The principal trade-off is that the fanout does not remove per-channel skew or jitter, so the complete clock tree must be budgeted against receiver timing requirements.
推荐
Telecommunications Clock Routing
The SY89113UMY is suitable for telecommunications clock routing because its 2:1 input multiplexer can select between two clock sources and distribute the chosen signal to 12 LVDS outputs. Operation up to 1 GHz and the 2.5 V supply match low-jitter, low-skew distribution architectures used in precision equipment. Differential signaling helps control noise coupling on longer board-level routes when implemented with controlled impedance. Designers should still validate insertion loss, receiver thresholds, cable or connector effects, and redundancy-transition behavior at the system level.
推荐
High-Speed Backplane Fanout
A 44-MLF exposed-pad package makes the SY89113UMY practical for compact high-speed backplane clock trees requiring more outputs than a basic one-to-four buffer. The 1:12 ratio can distribute one selected clock to multiple backplane endpoints, while the integrated 2:1 mux supports alternate clock sources. Differential LVDS outputs are intended to preserve signal integrity across controlled-impedance routes. Keep output branches short, provide continuous reference planes, and account for connector or trace discontinuities so that channel loss does not erode the system timing margin.
推荐
Redundant Clock Source Switchover
The SY89113UMY integrates a 2:1 input multiplexer specifically for clock switchover applications, allowing a system to select one of two clock sources before distributing it through the 1:12 LVDS fanout stage. This architecture can support redundancy in telecom, server, and industrial control systems without requiring a separate output-multiplexer stage. The benefit is a smaller clock-control topology and fewer distributed signals. The trade-off is that switch timing and any output interruption must be accounted for by downstream receivers and system-level recovery logic.
推荐
Test and Measurement Instrumentation
The SY89113UMY can distribute a selectable clock to 12 synchronous test points in instrumentation and automated test equipment. Its stated low-jitter, low-skew characteristics and 1 GHz maximum frequency make it appropriate for clock-heavy systems that require multiple related outputs. Differential LVDS reduces sensitivity to common-mode noise when receiver and transmitter interfaces are correctly terminated and impedance-controlled. For measurement accuracy, verify the aggregate jitter, skew, and channel contribution of the source, buffer, cabling, receivers, and software rather than relying on the buffer’s nominal frequency alone.
推荐
Industrial Synchronization Networks
The SY89113UMY is applicable to industrial synchronization networks that need one selected reference clock delivered to multiple controller or interface circuits. The 2.5 V supply, internal input termination, 2:1 source selection, and 12 LVDS outputs can simplify a distributed clock architecture while preserving differential signal integrity. Compact exposed-pad construction also supports high-density control boards, although the exposed pad must be connected according to the manufacturer’s package guidance. Validate environmental temperature, clock accuracy, fault response, and output continuity for the intended industrial control function.
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推荐产品汇总
工程参考数据： SY89113UMY ——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 | SY89113U |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 44-MLF, exposed pad | 44-MLF; ordering-code details require confirmation |
| Device Type | LVDS clock fanout buffer | LVDS clock fanout buffer |
| Clock Fanout Ratio | 1:12 | 1:12 |
| Input Multiplexer Ratio | 2:1 | 2:1 |
| Maximum Clock Frequency | 1 GHz | 1 GHz |
| Supply Voltage | 2.5 V | 2.5 V |
| Output Logic | LVDS differential | LVDS differential |
| Input Termination | Internal termination | Internal termination |
关键差异点
- Integrated source selection and wide fanout （对比 SY89113U)
- Differential clock distribution （对比 SY89113U)
- Compact exposed-pad implementation （对比 SY89113U)
设计说明
Route every LVDS pair as a controlled-impedance differential pair with a continuous reference plane and avoid interrupting the return path beneath the pair. Keep output branches short and matched, and observe the receiver and transmitter spacing recommendations in the manufacturer application circuit. Excessive stubs or asymmetric routing can increase reflections and skew even when the nominal clock frequency remains below 1 GHz.
Place the 2.5 V decoupling capacitor immediately adjacent to the supply and ground connections, and connect the exposed thermal pad using the manufacturer’s recommended land pattern. The exposed pad must be connected to the appropriate ground potential. Review the package drawing and PCB stack-up rather than relying on generic QFN land patterns, because pad dimensions and thermal-via requirements are package-specific.
Do not treat the SY89113U family designation as an automatic substitution for SY89113UMY. Verify the ordering-code table, temperature grade, package dimensions, exposed-pad connection, packing method, and every mux-control and SE-TERM pin before redesigning the PCB. The 2:1 mux control and internal termination also require confirmation of logic levels and valid operating states from the manufacturer datasheet.
合规信息
The available manufacturer and distributor records do not state RoHS, REACH, halogen-free, or conflict-minerals status for this exact ordering code. AEC-Q100 is not applicable because the device is a clock and timing integrated circuit rather than an automotive-qualified device identified as such.
