SY87700VZH - 175Mbps AnyRate CDR | Microchip Technology
料号： SY87700VZH ✗ 停产SY87700VZH 概述
A clock and data recovery IC is a timing-control semiconductor that reconstructs a usable clock from an incoming serial data stream or generates a synchronized reference clock. The SY87700VZH belongs to the clock and timing IC hierarchy, where phase-locked loops support stable reference generation, clock multiplication, and recovery in SONET/SDH, ATM, Ethernet, and related serial-interface systems. Its AnyRate architecture is useful where the interface rate can vary rather than remaining fixed at one nominal speed.
Key features include support for 3.3 V and 5 V power-supply options, NRZ data recovery through 175 Mbps, and clock generation through 175 Mbps. Two on-chip phase-locked loops provide separate clock-generation and clock-recovery functions. The device is designed for SONET/SDH and ATM-compatible interfaces and provides one recovered or generated clock output. Its 28-SOIC package supports conventional PCB assembly and thermal management without a fine-pitch BGA footprint.
The two-loop architecture separates reference synthesis from data recovery, allowing one PLL to establish the nominal clock relationship while the other tracks phase variation in the incoming serial stream. This structure supports flexible AnyRate operation while reducing the external circuitry needed for clock generation, jitter control, and data-to-clock alignment in communications equipment.
Typical applications include telecommunications line interfaces, SONET/SDH equipment, ATM interfaces, Ethernet system timing, and high-speed network backplane clocking. It is particularly relevant when a board must recover timing from an NRZ stream or produce a clock at a rate selected by the system configuration. The single-output architecture should be matched against the number of clocks required by the target board.
For implementation, follow the pin-description table and reference circuit in the manufacturer datasheet, especially for reference-clock connections, PLL loop filters, and supply decoupling. PCB signal integrity is critical because jitter and phase noise at the recovered output depend on trace geometry, grounding, and isolation between high-speed clock paths and surrounding digital circuitry.
This page combines the operating limits, package information, application guidance, comparison criteria, and practical design considerations needed to evaluate the SY87700VZH for a clock-and-data-recovery design. It also identifies the distinctions that matter when comparing same-family options or planning a replacement program.
直接替换替代料： SY87700VZH ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SY87700VZH （相同外形与封装尺寸） ——差异在于 Package, Primary Applications.
SY87700LZI
✅ 直接替换联系询价
查看数据手册 →SY87700LHG
✅ 直接替换联系询价
查看数据手册 →SY87701ALZG
✅ 直接替换📋 参考替代料（不在目录中）
SY87700VZH 规格参数
| Product Type | AnyRate clock and data recovery IC |
| Minimum Data Recovery Rate | 32 Mbps |
| Maximum Data Recovery Rate | 175 Mbps |
| Maximum Clock Generation Rate | 175 Mbps |
| Supply Voltage Options | 3.3 V or 5 V |
| 输出数量 | 1 output |
| PLL Count | 2 on-chip PLLs |
| Data Format | NRZ |
| 封装 | 28-pin SOIC |
| Package Width | 7.50 mm |
| 安装类型 | Surface mount |
| Primary Applications | SONET/SDH, ATM, Ethernet, and telecommunications interfaces |
| Synchronization Architecture | Separate PLL for clock generation and clock recovery |
SY87700VZH 7.50 mm 引脚配置指南
SY87700VZH（7.50 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： SY87700VZH.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SY87700VZH 适用于 6 应用s: SONET/SDH Telecommunications Interfaces, ATM Packet Interface Recovery, Ethernet Backplane Clocking, High-Speed Network Line Cards, Telecommunications Test Equipment, Industrial Communication Interfaces.
SONET/SDH Telecommunications Interfaces
The SY87700VZH fits telecommunications interfaces that recover timing from an NRZ stream or require a derived clock at rates up to 175 Mbps. Its two internal PLLs separate clock generation from clock recovery, while the 3.3 V or 5 V supply options support different line-card power architectures. The 28-SOIC package also simplifies assembly where fine-pitch BGA routing is undesirable. Designers should use the manufacturer reference circuit to set the reference clock, loop-filter values, and output configuration. Validate jitter, acquisition behavior, and phase margin against the line-rate and SONET/SDH timing budget before release.
推荐
ATM Packet Interface Recovery
The SY87700VZH is suitable for ATM equipment requiring clock generation or clock-and-data recovery over a 32 Mbps to 175 Mbps range. Its AnyRate behavior allows the same timing-device family to address multiple interface rates, while one output suits designs that require a single recovered or synthesized clock. Two on-chip PLLs support clock synthesis and data alignment without relying on separate external multiplier ICs. The design must still account for reference-jitter budget, loop bandwidth, input data format, and board-level return-path continuity. Use the manufacturer application information to configure each PLL and confirm lock behavior over the complete operating range.
推荐
Ethernet Backplane Clocking
The SY87700VZH can support Ethernet and networking backplane systems that need a recovered clock or a generated reference clock at up to 175 Mbps. Its single-output architecture is appropriate for point-to-point timing distribution where multiple independent clocks are not required. The 28-SOIC package provides a conventional surface-mount assembly option, and the selectable 3.3 V or 5 V operating mode helps align with network-interface board power plans. Clock routing remains the critical implementation issue: use short controlled-impedance traces, solid ground references, and separation from high-current switching nodes. Confirm output jitter and acquisition time against the backplane timing specification.
推荐
High-Speed Network Line Cards
The SY87700VZH is appropriate for line-card clocking where an incoming serial stream must be converted into a stable timing reference at 32 Mbps through 175 Mbps. Its integrated clock-generation and clock-recovery PLLs reduce the number of separate timing blocks in a compact communications design. Operation from either 3.3 V or 5 V supports board-level power partitioning, while the 28-SOIC package simplifies assembly and thermal inspection. Designers should reserve short paths for the reference clock and loop components, maintain continuous ground planes under the timing section, and isolate output clock routing from noisy processor and transceiver regions. Confirm lock range and jitter using the actual system reference source.
推荐
Telecommunications Test Equipment
The SY87700VZH can provide clock generation or recovery in telecommunications test equipment that operates with NRZ streams at rates through 175 Mbps. Its selectable operating range is useful for multi-rate test paths, and the two-PLL architecture supports both a source clock and a data-recovery function within one device. The single clock output must be routed according to the test-channel architecture, and external loop-filter choices determine loop bandwidth and jitter performance. Use low-noise references and short analog timing traces to preserve measurement integrity. Before production, verify acquisition time, reference-to-output phase relationship, and output jitter at every intended line rate.
推荐
Industrial Communication Interfaces
The SY87700VZH fits industrial communication equipment requiring deterministic clock recovery from serial NRZ data at rates up to 175 Mbps. The 3.3 V and 5 V supply options accommodate industrial control and communication boards with different rail structures, while the 28-SOIC package supports automated surface-mount assembly. For long-lived equipment, thermal rise, supply-noise coupling, and timing stability should be evaluated over the intended environmental range. Keep the clock and reference paths away from motors, relay drivers, and switching regulators, and provide a quiet ground reference around the PLL network. Validate the complete clocking loop under worst-case input jitter and temperature conditions.
推荐
推荐产品汇总
工程参考数据： SY87700VZH ——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 | SY87700LZI | SY87700LHG | SY87701ALZG |
|---|---|---|---|---|
| Package | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Type | AnyRate clock and data recovery IC | PLL clock generator | PLL clock generator | 3.3 V AnyRate CDR |
| Supply Voltage Options | 3.3 V or 5 V | 3.3 V | 3.3 V | 3.3 V |
| Number of Pins | 28 pins | 28 pins | 28 pins | 28 pins |
| Primary Interface Applications | SONET/SDH, ATM, Ethernet, and telecommunications | High-speed fiber-optic and network timing | Telecommunications and network timing | AnyRate clock and data recovery |
关键差异点
- Supports both 3.3 V and 5 V supply options （对比 SY87701ALZG)
- Two-PLL clock generation and recovery architecture （对比 SY87700LZI)
- Lower maximum rate provides a focused 175 Mbps operating range （对比 SY87701ALZG)
设计说明
Treat the reference clock, PLL loop components, data input, and recovered-clock output as a compact high-speed signal path. Place loop-filter parts close to their assigned pins, use short ground returns, and avoid routing the timing output across split planes or beneath switching regulators. The manufacturer datasheet and reference circuit should control trace geometry, grounding, and component placement because layout changes can alter jitter and loop behavior.
Use the manufacturer’s recommended supply decoupling network and provide a low-impedance connection from each power pin to the ground plane. Keep the 3.3 V or 5 V supply decision consistent with the selected operating mode and absolute ratings. Estimate the regulator’s local heat rise using the measured input-to-output voltage difference multiplied by output current, then confirm that the 28-SOIC thermal performance is adequate at the maximum board temperature.
Validate recovered-clock jitter, phase margin, and acquisition time with the actual reference clock and worst-case input jitter rather than assuming ideal source conditions. A clean reference with poor board isolation can degrade timing as effectively as a noisy reference. Use controlled-impedance routing, maintain a continuous reference plane, minimize stub branches, and keep adjacent high-speed or switching traces away from the PLL and recovered-clock paths.
Do not select a replacement solely because it uses a 28-pin SOIC outline. The SY87700LZI and SY87700LHG have listed 3.45 V maximum supply ratings, while the SY87701ALZG extends the listed maximum rate to 1250 Mbps. Confirm supply limits, rate range, temperature grade, pin behavior, configuration method, reference requirements, and loop-filter values against the manufacturer datasheet before approving a substitution.
合规信息
Compliance declarations for the exact SY87700VZH ordering code are not established by the product information. Obtain current manufacturer documentation before using the component in a compliance-controlled design.