SY88913KC - 1.25Gbps Limiting Post Amplifier | Microchip
部品番号: SY88913KC ✓ 生産中SY88913KC 概要
A limiting post amplifier is a signal-conditioning IC within the broader optical-communication receiver chain. It receives a high-speed data signal that has already been converted into an electrical signal, restores the waveform to suitable logic levels, and provides a predictable output suitable for driving downstream circuitry. Its 1.25Gbps headline data rate places it in the class of high-speed line-rate interface amplifiers rather than low-frequency audio or instrumentation amplifiers.
The SY88913KC includes several implementation-critical features. Programmable level detection allows the loss-of-signal threshold to follow a particular optical receiver's sensitivity, power budget, and system noise conditions. The documented output termination requirement calls for a 50-ohm load connected to VCC minus 2V, or an equivalent Thevenin termination, which helps establish the correct high-speed output environment. The manufacturer also emphasizes that PCB layout strongly affects performance.
The device is supplied in a compact 10-MSOP package and identified as a commercial-temperature ordering option. In a typical optical-module or telecommunications receiver design, the SY88913KC can sit after the photodiode or transimpedance stage and before a clock-and-data-recovery circuit, serializer, or digital decision circuit. Its role is to provide limiting amplification and loss-of-signal information rather than to perform clock recovery or decoding.
Careful signal-integrity layout is essential when using this amplifier. High-speed traces should be short, impedance-controlled, properly terminated, and kept away from unrelated clocks and switching nodes. The input, output, supply, and reference connections should follow the manufacturer layout guidance. Because the device relies on a defined termination network and adjustable level-detect threshold, substituting components without comparing pin functions, supply requirements, threshold behavior, and output termination can alter receiver performance.
This page consolidates the verified 1.25Gbps limiting-amplifier description, programmable loss-of-signal behavior, package information, sourcing details, and practical implementation considerations into one engineering-focused reference. It also identifies where verified replacement data and detailed electrical limits are unavailable so engineers can distinguish documented facts from parameters requiring confirmation in the manufacturer datasheet.
ドロップイン代替品: SY88913KC — 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。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストSY88913KC 最大定格＆電気的特性
| Product Type | High-speed limiting post amplifier |
| データレート | 1.25 Gbps |
| パッケージ | 10-MSOP |
| Manufacturer | Microchip Technology |
| Original Manufacturer | Micrel Semiconductor |
| Operating Grade | Commercial |
| Output Termination | 50 ohm load to VCC - 2 V or equivalent Thevenin termination |
| Loss-of-Signal Detection | Programmable |
| Level-Detect Control | LOSLVL |
| Reference Supply | VREF |
| Enable Input | /EN |
SY88913KC 10-msop ピン配置ガイド
SY88913KC (10-msop パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: SY88913KC.
詳細は データシート をご参照ください。
主な用途
SY88913KC の用途: 6 件s: Optical Communications Receiver, High-Speed Data Receiver Interface, Clock-and-Data-Recovery Front End, Telecommunications Line Card, Network Interface Module, Digital Test and Measurement Equipment.
Optical Communications Receiver
The SY88913KC fits an optical receiver immediately after the photodetector and transimpedance amplifier, where the electrical data stream must be restored to stable logic levels. Its 1.25Gbps rate accommodates line-rate signal conditioning, while the programmable loss-of-signal function can report when the incoming signal disappears. The manufacturer specifies a 50-ohm load to VCC minus 2V, or an equivalent Thevenin network, so output layout and termination must follow the datasheet reference design.
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High-Speed Data Receiver Interface
The SY88913KC can condition a high-speed data signal in receiver circuitry operating at up to 1.25Gbps. Its limiting function is intended to provide usable signal levels to downstream digital logic, while the LOSLVL threshold control allows loss-of-signal behavior to be tuned to the receiver architecture. The placement and trace geometry remain critical because the manufacturer notes that high-frequency performance can be largely determined by board layout.
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Clock-and-Data-Recovery Front End
Used ahead of a clock-and-data-recovery circuit, the SY88913KC provides limiting amplification for a 1.25Gbps-class signal and supplies loss-of-signal status to the surrounding system. The status can be routed toward the /EN function when signal loss threatens stability. Designers should compare the amplifier output levels with the CDR input requirements and implement the specified 50-ohm termination to limit reflections and preserve edge quality.
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Telecommunications Line Card
The SY88913KC is suitable for compact telecommunications receive paths requiring a 1.25Gbps limiting stage and active loss-of-signal indication. Its 10-MSOP construction supports space-constrained line-card designs, while the adjustable threshold can accommodate different optical or copper receiver conditions. The main engineering trade-off is careful high-speed layout: short controlled traces, close termination, clean grounding, and isolated supply paths are needed to realize the documented performance.
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Network Interface Module
A network interface module can use the SY88913KC to condition a recovered 1.25Gbps data stream and report loss of the incoming signal. The limiting action helps establish predictable downstream levels, while the programmable detector can initiate a controlled response when the link is unavailable. Because the device is not a protocol-specific transceiver, the surrounding module must provide the physical receiver, clock recovery, logic, and system-level link management.
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Digital Test and Measurement Equipment
The SY88913KC can serve as a high-speed signal-conditioning element in digital test equipment or a data-capture front end operating near 1.25Gbps. Limiting amplification may improve the transition into a downstream decision circuit, while loss-of-signal status helps the instrument distinguish an inactive input from a valid data stream. Instrument designers must control reflections with the specified 50-ohm termination and use short, impedance-consistent routing between the amplifier and acquisition logic.
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エンジニアリング参考データ: SY88913KC — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
設計ノート
Use the manufacturer reference layout for the 1.25Gbps signal path. According to the manufacturer datasheet, performance can largely be determined by PCB layout and design. Keep input and output traces short, use a continuous reference plane, avoid stubs, and maintain the intended characteristic impedance. Place the 50-ohm termination as close as practical to the amplifier output to reduce reflections and edge-rate degradation.
Terminate the SY88913KC output with a 50-ohm load connected to VCC minus 2V, or with an equivalent Thevenin termination as described in the manufacturer datasheet. Provide a low-impedance supply path and local decoupling, while keeping switching-current loops away from the high-speed input and output nodes. Confirm the allowed supply and reference voltages in the manufacturer document before selecting component values.
Do not set the loss-of-signal threshold by assumption. The manufacturer specifies a resistor divider between VCC and VREF for the LOSLVL function, and that detector state can be fed back to /EN. Review receiver sensitivity, normal signal amplitude, noise margin, and system shutdown behavior together. An incorrect threshold can report false loss of signal or prevent the receiver from recognizing a valid input.
Separate the 1.25Gbps path from clocks, switching regulators, and other high-energy nodes. Use continuous ground-plane return paths, minimize vias in the critical path, and keep the VREF and LOSLVL resistor network away from noisy traces. Because this is a limiting post amplifier, reflections and grounding discontinuities can directly affect waveform quality even when the nominal data rate is correct.
コンプライアンス情報
The verified sources identify a commercial operating grade but do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. These statuses must be confirmed with Microchip Technology for the exact orderable suffix.
