SY87700VHC - 175 Mbps AnyRate CDR | Microchip Technology
部品番号: SY87700VHC ✗ 生産終了SY87700VHC 概要
An AnyRate clock and data recovery, or CDR, is a timing-recovery integrated circuit used to extract a usable clock from a serial data stream and regenerate a synchronized output clock. A CDR belongs to the broader clock and timing IC hierarchy, where it supports communication links, network equipment, and optical-transport systems. Unlike a fixed-rate divider or basic clock buffer, the SY87700VHC can recover data across a stated 32 Mbps to 175 Mbps operating range and can also generate a clock from the same upper-rate class.
The SY87700VHC supports both 5 V and 3.3 V power-supply options. Its two on-chip phase-locked loops divide the internal functions into one loop for clock generation and another for clock recovery. The available sources describe one output, while the exposed-pad TQFP package supports thermal management when the device operates continuously. Link-fault indication and ECL-compatible interfaces provide useful features for telecommunications and SONET/SDH-class designs.
The architecture supports clock and data recovery from an NRZ data stream up to 175 Mbps and clock generation up to 175 Mbps. The datasheet search excerpt also identifies compliance with Bellcore, ITU/CCITT, and ANSI specifications for applications including OC-1, OC-3, FDDI, and Fast Ethernet. These protocol names describe supported legacy network and transport use cases rather than guaranteeing interoperability with every modern implementation.
Typical uses include SONET/SDH equipment, ATM network interfaces, telecom line-card clocking, legacy optical transport links, and recovery paths in Ethernet-oriented equipment. The 100K ECL-compatible interface can be useful where legacy backplane logic levels are required. When using that interface, designers must confirm voltage compatibility, termination, signal integrity, and the exact operating mode against the manufacturer datasheet.
For new layouts, use the 32-pin EPAD-TQFP rather than the 28-pin SOIC option that the datasheet notes is available but not recommended for new designs. Keep high-speed routing short, provide clean power and ground planes, and connect the exposed pad to the intended thermal and ground structure. Verify the exposed-pad layout and stack-up against the current Microchip package drawing before release to production.
This product record consolidates the verified manufacturer and distributor information for the SY87700VHC and distinguishes documented capabilities from unavailable details. Numeric pricing, exact pin names, electrical limits, and verified drop-in replacements are not inferred when the supplied records do not provide them. It also provides practical application guidance, source links, and a structured comparison framework for engineers evaluating this legacy AnyRate CDR.
ドロップイン代替品: SY87700VHC — 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SY87700VHC 仕様
| 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 Option 1 | 5 V |
| Supply Voltage Option 2 | 3.3 V |
| 出力数 | 1 output |
| Phase-Locked Loop Count | 2 on-chip PLLs |
| PLL Functions | One for clock generation and one for clock recovery |
| Data Format | NRZ |
| I/O Compatibility | 100K ECL compatible |
| Link Fault Indication | Supported |
| Protocol Compatibility | SONET/SDH and ATM |
| Specified Application Compatibility | OC-1, OC-3, FDDI, and Fast Ethernet |
| パッケージ | 32-pin EPAD-TQFP, 7 x 7 mm |
| Alternative Legacy Package | 28-pin SOIC available but not recommended for new designs |
| 実装タイプ | Surface mount |
SY87700VHC 28-pin soic available but not recommended for new designs ピン配置ガイド
SY87700VHC (28-pin soic available but not recommended for new designs パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: SY87700VHC.
詳細は データシート をご参照ください。
主な用途
SY87700VHC の用途: 6 件s: SONET and SDH Telecom Equipment, ATM Network Interface Recovery, Legacy OC-1 and OC-3 Optical Transport, FDDI and Fast Ethernet Timing Paths, Telecom Backplane Clock Distribution, Network Line-Card Interface Circuits.
SONET and SDH Telecom Equipment
The SY87700VHC fits legacy telecom clocking because the Microchip manufacturer datasheet identifies SONET/SDH compatibility and a 32 Mbps to 175 Mbps AnyRate recovery range. The device can recover clock and data from an NRZ stream while also providing clock generation through its second internal PLL. In a line-card or transport design, engineers can evaluate the 1-output device against OC-1 and OC-3 requirements while accounting for the exact protocol rate, jitter budget, and 100K ECL-compatible interface levels.
ATM Network Interface Recovery
The SY87700VHC is suitable for an ATM-oriented clock-and-data path because the manufacturer datasheet explicitly names ATM compatibility and 100K ECL-compatible I/O. At the receive side of an interface, the CDR can extract timing from an NRZ stream within the documented 32 Mbps to 175 Mbps range, while its separate clock-generation PLL supports designs that also require a distributed or regenerated clock. Final deployment requires verification of ATM timing tolerance, interface levels, and system-specific loss-of-signal behavior.
Legacy OC-1 and OC-3 Optical Transport
The documented OC-1 and OC-3 compatibility makes the SY87700VHC relevant to legacy optical-transport equipment that still relies on dedicated clock recovery. Its AnyRate range spans 32 Mbps to 175 Mbps, allowing one timing-recovery component to address several transport-related rates rather than requiring a separate fixed-rate device for every operating mode. Designers should use the manufacturer datasheet to confirm jitter transfer, lock behavior, and voltage requirements for the specific OC line rate and optical-module interface.
FDDI and Fast Ethernet Timing Paths
The SY87700VHC can be evaluated for FDDI and Fast Ethernet timing paths because both applications are expressly listed in the Microchip manufacturer datasheet. Its 32 Mbps to 175 Mbps AnyRate operation provides a common recovery function for legacy streams within that range, while 100K ECL-compatible I/O may simplify integration with older backplane logic. Modern Ethernet PHY and MAC designs require additional checks for encoded line rates, interface voltage domains, loss-of-signal behavior, and whether a dedicated Ethernet clock-recovery device would be more appropriate.
Telecom Backplane Clock Distribution
The SY87700VHC can support telecom backplane clock-recovery or regeneration functions where a recovered timing signal must be regenerated for downstream logic. Its two-PLL architecture separates clock recovery from clock generation, and the available 175 Mbps class supports legacy transport-rate environments. The exposed-pad 32-pin TQFP package also provides a defined path for thermal dissipation. Layout work should preserve short high-speed routes, use the specified ground-plane structure, and verify output timing and I/O termination before production.
Network Line-Card Interface Circuits
The SY87700VHC is applicable to legacy network line cards that receive NRZ data and require deterministic clock recovery. Its documented 32 Mbps to 175 Mbps range and single output suit systems with a defined receive and regeneration path, while 5 V and 3.3 V supply options support different legacy board generations. Because the device is categorized as an application-specific clock and timing IC, system architects should confirm protocol compatibility, lock acquisition behavior, and the correct supply variant against the full manufacturer datasheet.
エンジニアリング参考データ: SY87700VHC — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Package | 32-pin EPAD-TQFP, 7 x 7 mm |
| Brand | Microchip Technology |
| Product Type | AnyRate clock and data recovery IC |
| Data Recovery Rate | 32 Mbps to 175 Mbps |
| Maximum Clock Generation Rate | 175 Mbps |
| Supply Voltage Options | 5 V and 3.3 V |
| Number of Outputs | 1 output |
| Phase-Locked Loops | 2 on-chip PLLs |
| I/O Compatibility | 100K ECL compatible |
| Protocol Compatibility | SONET/SDH and ATM; OC-1, OC-3, FDDI, and Fast Ethernet applications stated |
主な差別化要因
- AnyRate operation across a broad legacy telecom range （vs No verified drop-in alternative was identified in the supplied cross-reference data)
- Integrated clock generation and recovery functions （vs A conventional single-function fixed-rate clock buffer)
- Telecom-oriented interface and protocol support （vs A general-purpose CMOS clock generator)
設計ノート
Use the exposed pad as part of the thermal design rather than treating it as an optional PCB feature. The SY87700VHC is offered in a 32-pin EPAD-TQFP, and the manufacturer datasheet identifies an exposed-pad package for new designs. Follow the Microchip land pattern and thermal-via guidance, provide a low-impedance connection to the ground plane, and evaluate junction temperature across worst-case supply, data-rate, and output-loading conditions.
Keep clock and data routes short and controlled because the SY87700VHC is intended for data rates as high as 175 Mbps. Route high-speed nets over a continuous reference plane, avoid unnecessary stubs and test pads, and apply the interface termination specified by the manufacturer datasheet. The 100K ECL-compatible I/O requirement makes voltage compatibility and return-path continuity especially important when the device is used with legacy telecom backplanes.
Do not treat the 28-pin SOIC version mentioned in the manufacturer datasheet as an automatic substitute for the 32-pin EPAD-TQFP SY87700VHC. The manufacturer notes that the SOIC is available but not recommended for new designs, and the supplied evidence does not establish a pin-compatible ordering code. For any replacement, compare the complete pinout, package drawing, timing limits, I/O voltage levels, and clock-generation functions rather than matching the rate range alone.
コンプライアンス情報
The supplied search records do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for this exact MPN. Compliance must be confirmed using Microchip's current product material declaration or product-page records.
