SY87701VHC - 1.25Gbps AnyRate CDR | Microchip Technology
料号： SY87701VHC ✓ 量产中SY87701VHC 概述
A clock and data recovery IC, or CDR, is a specialized timing integrated circuit that extracts or regenerates a serial clock from a high-speed data stream and aligns the recovered data for downstream processing. The SY87701VHC belongs to the clock and timing IC hierarchy, where it combines clock recovery, data retiming, and multiplexing functions. Its AnyRate operating concept allows one circuit to serve multiple line rates rather than requiring a separate fixed-rate recovery device.
Key features include support for 32 Mbps through 1.25 Gbps NRZ data, a maximum operating frequency of 1.25 Gbps, 3.3 V and 5 V power-supply options, and PECL or TTL input compatibility. The recovered clock can operate at up to 1.25 Gbps, while the PECL output is suitable for high-speed optical, ATM, SONET/SDH, and Fibre Channel interfaces. The exposed pad supports improved thermal performance on a 7 mm × 7 mm surface-mount package.
The SY87701VHC integrates a phase-locked-loop-based clock recovery architecture with clock and data multiplexing functions. This architecture allows a shared source to feed the device while the internal recovery and multiplexing paths support high-speed serial links. Its dual input and output logic families make it useful when a board must interface between TTL/CMOS-style digital sources and ECL-family PECL links, although input levels, termination, and supply voltage must be verified against the manufacturer datasheet.
Typical applications include 1.25 Gbps Fibre Channel equipment, ATM switching systems, SONET/SDH line interfaces, Ethernet transmission equipment, and other recovered-clock or retimed-data designs. The device is most appropriate where a designer needs multiple supported rates, direct clock recovery, and a multiplexed high-speed output within one communication subsystem.
A critical design consideration is that high-speed PECL and TTL interfaces require controlled impedance routing, correct reference-plane return paths, and carefully placed termination. Power and ground distribution must also be designed to limit disturbance from the clock recovery circuitry. Before layout, engineers should confirm the exact pin assignment, differential clock requirements, input thresholds, and exposed-pad connection details in the manufacturer datasheet.
This page consolidates the verified distributor specifications, source links, package information, pricing status, application guidance, and data limitations for SY87701VHC. It also distinguishes verified facts from parameters that still require confirmation from the manufacturer datasheet, helping engineers evaluate the IC without relying on unverified substitute parts.
直接替换替代料： SY87701VHC ——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SY87701VHC 规格参数
| Product Type | AnyRate Clock and Data Recovery Multiplexer IC |
| Minimum Data Rate | 32 Mbps |
| Maximum Data Rate | 1.25 Gbps |
| 最大时钟频率 | 1.25 Gbps |
| Data Format | NRZ |
| Supply Voltage Options | 3.3 V or 5 V |
| Input Signal Type | PECL or TTL |
| Output Signal Type | PECL |
| 输出数量 | 1 output |
| Primary Function | Clock and data recovery |
| Additional Function | Multiplexing |
| Architecture | PLL-based clock recovery |
| 封装 | 32-pin TQFP exposed pad, 7 mm × 7 mm |
| 安装类型 | Surface mount |
| Application 1 | Ethernet |
| Application 2 | SONET/SDH |
| Application 3 | ATM |
| Application 4 | Fibre Channel |
SY87701VHC 32-pin tqfp exposed pad, 7 mm × 7 mm 引脚配置指南
SY87701VHC（32-pin tqfp exposed pad, 7 mm × 7 mm 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： SY87701VHC.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SY87701VHC 适用于 6 应用s: Fibre Channel Interfaces, ATM Switching Equipment, SONET and SDH Line Interfaces, Gigabit Ethernet Data Paths, High-Speed Serial Test Equipment, Industrial Backplane Communications.
Fibre Channel Interfaces
The SY87701VHC fits 1.25 Gbps Fibre Channel interfaces because it recovers clock and data from NRZ streams at rates from 32 Mbps through 1.25 Gbps and can generate a clock at up to 1.25 Gbps. It accepts PECL or TTL inputs and provides a PECL output, allowing it to sit between a source or transceiver and a recovered-clock processing block. The AnyRate architecture can reduce the need for separate fixed-rate recovery circuits across a multi-rate system. Designers must still verify jitter, reference-clock, input-threshold, and output-timing requirements in the manufacturer datasheet before using the part on a new Fibre Channel board.
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ATM Switching Equipment
The SY87701VHC is suitable for ATM switching equipment that requires recovered clock and data paths at rates up to 1.25 Gbps. Its clock recovery, data retiming, and multiplexing functions can support a shared serialization subsystem while accommodating NRZ traffic from 32 Mbps to 1.25 Gbps. The available PECL output is convenient for high-speed ECL-family links, while TTL input support can simplify interfacing with digital logic. The key design tradeoff is that the verified results do not provide detailed jitter or mode-specific timing data, so an ATM line-card designer should confirm those parameters and the exact pin mapping in the official datasheet.
推荐
SONET and SDH Line Interfaces
The SY87701VHC is explicitly identified for SONET/SDH communication applications, where recovered clock quality and deterministic data retiming are central requirements. Its 32 Mbps-to-1.25 Gbps AnyRate range allows one circuit to address multiple telecommunications data rates, while the PECL output suits ECL/PECL-based transmission stages. Engineers can use the device where a system needs clock recovery, data retiming, and multiplexing in a single package. Exact support for a particular SONET or SDH tributary rate, reference configuration, and jitter budget must be verified against the detailed datasheet rather than inferred from the general application listing.
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Gigabit Ethernet Data Paths
The SY87701VHC can support a 1.25 Gbps Ethernet-oriented data path because its maximum NRZ data rate is 1.25 Gbps and it produces a recovered PECL clock and data output. The component is useful where upstream logic or transceiver circuitry requires aligned clock and data rather than an asynchronous serial stream. Its support for TTL and PECL inputs provides flexibility when connecting different sections of the communications board. The verified results identify Ethernet as an application, but they do not state that the IC performs the physical-layer encoding required for a complete Ethernet link; designers need a separate transceiver and must verify standards-specific timing behavior.
推荐
High-Speed Serial Test Equipment
The SY87701VHC is appropriate for test and measurement modules that need to recover a clock from NRZ traffic spanning 32 Mbps to 1.25 Gbps. Combining clock recovery, data retiming, and multiplexing can reduce the number of separate timing blocks in a multi-rate serial test set, while the PECL output provides a familiar interface for high-speed instrumentation. In such equipment, low deterministic jitter and stable reference behavior are critical, but the supplied snippets do not provide jitter specifications. Engineers should therefore treat the device as a candidate and validate the full clock, data, and loopback performance against the manufacturer’s timing data.
推荐
Industrial Backplane Communications
The SY87701VHC can support industrial backplane subsystems that transport recovered clocks and NRZ data over short high-speed links. Its AnyRate range provides flexibility when a backplane must interoperate with equipment operating at different serial rates, and the TQFP exposed-pad package supports compact surface-mount assembly. PECL signaling requires disciplined impedance and return-path design, while the exposed pad requires the specified copper and thermal treatment. Because industrial temperature range, clock-jitter performance, and supply sequencing details are not included in the verified snippets, those items must be checked in the manufacturer datasheet before environmental qualification.
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推荐产品汇总
工程参考数据： SY87701VHC ——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 |
|---|---|
| Package | 32-pin TQFP exposed pad, 7 mm × 7 mm |
| Brand | Microchip Technology |
| Product Type | AnyRate clock and data recovery multiplexer IC |
| Minimum Data Rate | 32 Mbps |
| Maximum Data Rate | 1.25 Gbps |
| Maximum Clock Frequency | 1.25 Gbps |
| Supply Voltage Options | 3.3 V or 5 V |
| Input Signal Type | PECL or TTL |
| Output Signal Type | PECL |
| Number of Outputs | 1 output |
关键差异点
- Broad AnyRate operating range （对比 SY87701VHH)
- Combined recovery and multiplexing functions （对比 General-purpose fixed-rate clock-recovery devices)
- Mixed input and PECL output support （对比 Single-logic-family interface devices)
设计说明
Route recovered clock and data traces as controlled-impedance lines over a continuous reference plane, with no plane splits beneath the high-speed path. PECL interfaces are particularly sensitive to return-path discontinuities and excessive stub length. Keep clock and data geometry electrically consistent where skew matters, and place any required source or termination components close to the relevant pins according to the manufacturer’s recommended schematic.
Implement the 32-pin TQFP exposed-pad land pattern exactly as specified by the manufacturer and provide a low-impedance thermal and electrical connection from the pad to the relevant ground plane. The verified results confirm the 7 mm × 7 mm TQFP exposed-pad package but do not provide the land dimensions or split-plane guidance. Do not infer those dimensions from a generic TQFP footprint; use the official package drawing and thermal data.
Decouple each applicable supply rail at the device pins and preserve a low-impedance return path for high-frequency current. The verified information confirms 3.3 V and 5 V supply options, but it does not identify separate analog and digital rails, current consumption, or startup sequencing. Those details must be confirmed in the datasheet before selecting capacitors, planning voltage rails, or defining power-up behavior for the surrounding FPGA or ASIC.
Do not treat the SY87701VHH as a drop-in replacement solely because it belongs to the same product family, and do not rely on the distributor cross-reference search pages as proof of equivalence. A valid substitute requires an identical package and pin map, compatible supply voltage, matching clock and data input thresholds, equivalent output signaling, and acceptable timing and jitter behavior. None of those conditions were verified for the supplied candidate.
合规信息
The supplied verified snippets do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals compliance. AEC-Q100 is treated as not applicable because the product is an application-specific communication timing IC rather than an automotive-qualified device in the supplied data.
