SY69753LHC - 155Mbps CDR Multiplexer IC | Microchip Technology
料号： SY69753LHC ✓ 量产中SY69753LHC 概述
A clock and data recovery IC is a timing IC that extracts a synchronized clock from a serial data stream and aligns recovered data with that clock. In the signal hierarchy, a CDR belongs to clock and timing ICs, timing recovery ICs, interface ICs, and ultimately the broader semiconductor category. The SY69753LHC targets telecommunications transport networks operating at OC-3-class data rates.
Key verified features include a maximum data rate of 155Mbps, support for Ethernet, SONET/SDH, and ATM OC-3 interfaces, one recovered output, and a 3.3V supply identified by the distributor listing. The component integrates the functions normally associated with a serial-interface multiplexer and timing-recovery circuit into one package. Its 32-TQFP-EP (7x7) surface-mount package supports compact telecommunications and networking equipment.
The IC is positioned for systems in which a 155Mbps serial stream must be recovered and routed while maintaining timing alignment with associated channel-interface circuitry. Compared with passive clock distribution, a CDR performs an active timing function. Compared with a general-purpose transceiver, its application-specific architecture is directed specifically toward Ethernet, SONET/SDH, and ATM OC-3 interface requirements rather than a broad range of data rates.
Typical uses include optical transport equipment, SONET/SDH line-interface modules, ATM OC-3 line cards, packet-network timing subsystems, and legacy or migration-era 155Mbps Ethernet interfaces. In each case, system designers must account for the device's specific reference-clock topology, input/output data format, jitter requirements, and termination network because those detailed implementation values are not contained in the supplied web data.
The primary design consideration is board-level timing integrity. A 155Mbps CDR can be sensitive to trace discontinuities, impedance mismatches, return-path discontinuities, and inadequate reference-clock conditioning. Designers should follow the manufacturer's layout and component-selection guidance, preserve continuous ground and power planes, and validate the complete channel rather than relying only on nominal data-rate compatibility.
This page consolidates the verified distributor specifications, package information, application context, sourcing links, and replacement limitations for the SY69753LHC. It also distinguishes verified facts from electrical parameters that still require confirmation from the manufacturer datasheet, helping engineers make sourcing and design decisions without treating search-result summaries as a complete electrical specification.
直接替换替代料： SY69753LHC ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
SY69753AL
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SY69753LHC 规格参数
| Product Type | Application-specific clock and data recovery IC |
| Maximum Data Rate | 155Mbps |
| Supported Interfaces | Ethernet, SONET/SDH, ATM OC-3 |
| Output Count | 1 output |
| 电源电压 | 3.3V |
| 封装 | 32-TQFP-EP (7x7) |
| 安装类型 | Surface mount |
| 引脚数量 | 32 pins |
| Clock and Data Recovery Function | Yes |
| Multiplexer Function | Yes |
| Manufacturer | Microchip Technology |
SY69753LHC 32-tqfp-ep (7x7) 引脚配置指南
SY69753LHC（32-tqfp-ep (7x7) 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： SY69753LHC.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SY69753LHC 适用于 6 应用s: SONET/SDH OC-3 Transport Equipment, ATM OC-3 Line Cards, 155Mbps Ethernet Interface Modules, Optical Transport Line Cards, Packet-Network Timing Subsystems, Telecommunications Test Equipment.
SONET/SDH OC-3 Transport Equipment
The SY69753LHC is suitable for 155Mbps SONET/SDH transport interfaces because the verified DigiKey listing identifies SONET/SDH support and a maximum data rate of 155Mbps. It can serve as the clock-and-data-recovery and multiplexing element where a recovered serial stream must be aligned and routed within an OC-3 line card. The primary implementation benefit is integration of timing recovery and multiplexing in one application-specific IC, but system performance depends on the manufacturer's reference-clock and jitter requirements, which are not present in the supplied excerpts.
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ATM OC-3 Line Cards
The SY69753LHC fits ATM OC-3 line-card signal-path requirements because its verified feature set includes ATM OC-3 operation at up to 155Mbps. It can be used where recovered clock and data must be multiplexed before passing to other transport or switching circuits. The device may simplify board partitioning compared with separate recovery and multiplexing blocks, although designers must verify propagation delay, reference-clock stability, input sensitivity, and output timing from the manufacturer datasheet before replacing an existing OC-3 implementation.
推荐
155Mbps Ethernet Interface Modules
The SY69753LHC is relevant to 155Mbps Ethernet interface modules because the verified product classification explicitly lists Ethernet support and a one-output configuration. In a legacy or migration-oriented design, it can perform clock recovery and multiplexing within the serial interface path. Its 32-TQFP-EP (7x7) package allows placement alongside a network PHY and supporting logic, but engineers must match the exact data format and reference-clock arrangement because those interface details are not included in the verified search excerpts.
推荐
Optical Transport Line Cards
The SY69753LHC can support an OC-3 optical transport line card because it combines clock and data recovery with multiplexing for 155Mbps Ethernet, SONET/SDH, and ATM OC-3 interfaces. The verified single-output configuration makes it useful in point-to-point or tributary-interface arrangements where one recovered channel is required. Layout should emphasize controlled reference-clock routing, continuous return paths, and isolation from noisy switching stages. Jitter, latency, and loss-of-signal behavior must be checked in the manufacturer datasheet before production release.
推荐
Packet-Network Timing Subsystems
The SY69753LHC is applicable to packet-network timing subsystems that require a dedicated 155Mbps recovery function. Its application-specific clock-and-timing architecture is intended to recover synchronized data from supported serial interfaces rather than merely distribute a reference clock. That distinction can reduce the number of discrete timing blocks in qualified transport equipment. Engineering qualification should nevertheless compare the device's jitter transfer, reference input requirements, acquisition time, and output phase against the complete timing budget, none of which are verified in the supplied snippets.
推荐
Telecommunications Test Equipment
The SY69753LHC may be used in telecommunications test equipment that interfaces directly with 155Mbps Ethernet, SONET/SDH, or ATM OC-3 streams. Its one-output clock-and-data-recovery function can support a test-channel interface where synchronized data must be observed or injected. The 32-TQFP-EP (7x7) package is convenient for dense instrument electronics, but instrumentation users should validate input jitter tolerance, clock recovery behavior, output amplitude, and loopback timing. These characteristics require the complete manufacturer documentation and cannot be inferred from the distributor summary.
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推荐产品汇总
工程参考数据： SY69753LHC ——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 | SY69753AL |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 32-TQFP-EP (7x7) | 32-TQFP-EP (7x7) - requires datasheet confirmation |
| Product Type | Application-specific clock and data recovery IC | Clock and data recovery IC |
| Maximum Data Rate | 155Mbps | 155Mbps |
| Supported Data Rate | 125Mbps and 155Mbps | 125Mbps and 155Mbps |
| Supply Voltage | 3.3V | 3.3V |
关键差异点
- Verified 155Mbps OC-3-class support （对比 SY69753AL)
- Integrated clock recovery and multiplexing （对比 SY69753AL)
- Defined 3.3V, 32-TQFP-EP construction （对比 SY69753AL)
设计说明
Treat the SY69753LHC clock and data routes as controlled-impedance 155Mbps signals. Avoid stubs, abrupt width changes, unnecessary vias, and splits in the return path; provide a continuous ground reference beneath the routing region. Because the supplied data does not specify input impedance or allowable jitter, confirm the PCB stack-up and termination values directly from the manufacturer reference design before fabrication.
Place the SY69753LHC close to the interface components and keep its reference-clock path short, symmetric, and isolated from noisy switching nodes. Do not route the reference clock beneath or parallel to high-current power paths without a ground-plane separation strategy. Verify the exposed-pad connection in the package drawing because the verified distributor snippet identifies the EP package but does not state whether that pad is connected to ground or another net.
Follow the manufacturer power-decoupling topology rather than applying a generic bulk-capacitor arrangement. Use the shortest possible supply and ground connections between the device and local high-frequency capacitors, and preserve a low-impedance return beneath the package. The verified 3.3V rating identifies the nominal supply, but permissible voltage tolerance, current consumption, sequencing, and capacitor values are not included in the supplied data and must be confirmed before release.
合规信息
The supplied verified web results do not contain explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for SY69753LHC. These fields remain unknown rather than being inferred from the manufacturer name or general distribution status.
