SY87702LHI - 2.5Gbps AnyRate CDR Multiplexer | Microchip Technology
料号： SY87702LHI ✓ 量产中SY87702LHI 概述
A clock and data recovery IC is a timing-integrity component that reconstructs a synchronous clock from a serialized data stream. In the signal hierarchy, a CDR supports the clock and timing IC family, which belongs to broader digital and mixed-signal semiconductor systems. Recovering clock and data together helps a receiver establish the timing relationship required to process high-speed serial links accurately.
The SY87702LHI supports operation across a broad 28 Mbps to 2.5 Gbps range. Its 3.3 V supply operation suits modern communications equipment, while differential PECL and CML interfaces support high-speed point-to-point links. The integrated multiplexer reduces the number of separate timing and routing components required in systems that must handle multiple data paths. The device has one recovered output according to its distributor product classification.
The device is associated with Ethernet, SONET/SDH, and ATM applications, and its architecture also supports bandwidth-sensitive infrastructure such as Fibre Channel and Gigabit Ethernet. Differential signaling helps transmit clock and data information across a controlled-impedance board environment. CML outputs provide an additional interface choice for designs using compatible high-speed receivers and termination networks.
The 64-TQFP-EP package provides 64 signal pins plus an exposed thermal pad. It is a surface-mount solution suitable for multilayer PCB construction, although exposed-pad layout and thermal management must follow the package requirements. Care is especially important because high-speed differential routing, controlled impedance, short return paths, and proper decoupling materially affect signal integrity.
When designing around the SY87702LHI, begin by confirming that the selected data rate, interface voltage levels, reference-clock arrangement, and recovery mode match the system requirements. Preserve the differential-impedance geometry specified by the manufacturer and provide low-inductance connections from the power and ground pins to the decoupling network. Verify timing margins and loss budget at the intended signaling rate.
This product overview combines the SY87702LHI operating characteristics with application guidance, package details, interface considerations, and replacement guidance. It is intended to help engineers identify where the 3.3 V, 2.5 Gbps AnyRate architecture fits and which design parameters must be checked before committing the device to a high-speed PCB layout.
直接替换替代料： SY87702LHI ——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SY87702LHI 规格参数
| Product Type | Clock and data recovery multiplexer IC |
| Product Series | AnyRate |
| Minimum Data Rate | 28 Mbps |
| Maximum Data Rate | 2.5 Gbps |
| 电源电压 | 3.3 V |
| 输出数量 | 1 output |
| Input Interface | Differential PECL |
| Output Interface | Differential PECL and CML |
| PLL | Yes |
| Primary Applications | Ethernet, SONET/SDH, and ATM |
| 封装 | 64-TQFP-EP, 10 mm x 10 mm |
| 安装类型 | Surface mount |
| 引脚数量 | 64 pins plus exposed pad |
SY87702LHI 64-tqfp-ep, 10 mm x 10 mm 引脚配置指南
SY87702LHI（64-tqfp-ep, 10 mm x 10 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： SY87702LHI.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SY87702LHI 适用于 6 应用s: SONET and SDH Transport Equipment, Gigabit Ethernet Interface Equipment, ATM Network Interface Cards, Fibre Channel Backplane Links, High-Speed Network Interface Multiplexing, Industrial Communications Control Systems.
SONET and SDH Transport Equipment
The SY87702LHI fits SONET/SDH transport designs that require recovered clock and data signals in a compact high-speed timing circuit. Its operation from 28 Mbps to 2.5 Gbps covers a broad range of line rates, while differential PECL inputs and outputs support noise-resistant high-speed links. The integrated multiplexer can simplify systems that route clock and data through related channels. Designers should select the operating mode and reference-clock arrangement from the manufacturer datasheet, then validate jitter and eye-margin requirements at the target line rate.
Gigabit Ethernet Interface Equipment
The SY87702LHI is suitable for Gigabit Ethernet interface electronics that combine serial data with recovered timing information. Its AnyRate architecture covers 28 Mbps through 2.5 Gbps, allowing the same timing-device family to address multiple link speeds. Differential PECL and CML outputs allow implementation around compatible high-speed serializers and receivers. The design must maintain controlled differential impedance, provide correct termination, and establish adequate clock-to-data timing margin before the interface is released for production.
ATM Network Interface Cards
The SY87702LHI can support ATM interface paths where received serial data must be paired with a recovered clock before downstream processing. Its 3.3 V supply and support for rates up to 2.5 Gbps align with high-speed network-interface architectures. The built-in multiplexer reduces the amount of separate routing required in a clock-and-data channel, although system partitioning must still match the intended ATM layer and reference-clock topology. Confirm signaling levels, lane count, and timing constraints against the manufacturer documentation.
Fibre Channel Backplane Links
The SY87702LHI is applicable to Fibre Channel and related bandwidth-sensitive infrastructure because it combines clock recovery, data recovery, and multiplexing for serial links operating as high as 2.5 Gbps. Differential PECL and CML interfaces provide options for integrating with compatible line-driver and receiver circuitry. At these rates, PCB loss and return-path discontinuities can impair performance, so engineers should use short differential routes, appropriate reference planes, and manufacturer-recommended decoupling while verifying the complete channel.
High-Speed Network Interface Multiplexing
The SY87702LHI is well suited to interface blocks that must recover timing while managing multiple related clock and data paths. Its integrated multiplexer architecture can reduce component count compared with a design using separate recovery and multiplexing stages. The 28 Mbps-to-2.5 Gbps operating range permits common-device strategy across links operating at different speeds. For a practical implementation, verify the device mode, clock source, output routing, and termination requirements, then test recovered-clock jitter and data eye margins over temperature.
Industrial Communications Control Systems
The SY87702LHI can be used in industrial communication equipment where deterministic timing recovery is required between a high-speed serial transmitter and receiver. Its 3.3 V operation, differential signaling, and AnyRate range suit equipment handling variable-rate links within the supported envelope. Industrial systems should also evaluate temperature range, power-supply tolerance, electromagnetic-emissions requirements, and long-term component availability against the manufacturer specifications. Use the exposed-pad layout for reliable thermal performance in compact control hardware.
工程参考数据： SY87702LHI ——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 | 64-TQFP-EP, 10 mm x 10 mm |
| Product Type | Clock and data recovery multiplexer IC |
| Supply Voltage | 3.3 V |
| Minimum Data Rate | 28 Mbps |
| Maximum Data Rate | 2.5 Gbps |
| Input Interface | Differential PECL |
| Output Interface | Differential PECL and CML |
| Number of Outputs | 1 output |
| PLL | Yes |
关键差异点
- Wide AnyRate operating range （对比 Other clock and data recovery ICs)
- Integrated clock, data, and multiplexing functions （对比 Separate recovery and multiplexing stages)
- Multiple high-speed output standards （对比 PECL-only interface devices)
设计说明
Route each differential interface as a controlled-impedance pair with continuous reference planes and avoid stubs, test pads, and layer transitions that create discontinuities. Keep the data and clock paths short, match pair lengths where the interface requires it, and follow the manufacturer layout guidance for the 10 mm by 10 mm TQFP land pattern.
Treat the exposed pad as both a thermal feature and a layout constraint. Connect it to the manufacturer-specified ground network and use an appropriate via arrangement that improves heat transfer without disrupting return paths. Review junction-temperature limits under the worst-case ambient temperature and enclosure conditions rather than relying only on room-temperature calculations.
Validate recovered-clock quality, data-eye opening, jitter, and differential voltage at the intended 28 Mbps-to-2.5 Gbps operating rate. PECL and CML interfaces require correct source termination, receiver termination, common-mode handling, and reference-clock implementation. Use the complete transmitter, channel, and receiver path for measurements instead of testing the IC alone.
合规信息
Compliance attributes require confirmation from the current manufacturer product documentation or declaration.
