SY87701VZC - 1.25Gbps AnyRate CDR | Microchip | SONET
부품 번호: SY87701VZC ✓ 활성SY87701VZC 개요
A clock and data recovery IC is a specialized timing IC that reconstructs a synchronized clock from a serial data stream and removes timing distortion introduced by transmission lines, connectors, and other circuit elements. In the broader semiconductor hierarchy, the SY87701VZC belongs to the clock and timing IC class, where it combines phase-locked-loop technology, data recovery, and multiplexing functions for high-speed serial communication equipment.
Key features include AnyRate operation from 32 Mbps through 1.25 Gbps, support for both 3.3 V and 5 V power-supply options, one recovered-clock output, and a PECL input interface. The manufacturer datasheet identifies the device as suitable for Bellcore, ITU/CCITT, and ANSI-based telecom specifications, including OC-3, OC-12, ATM, FDDI, and Fibre Channel interfaces. Its 28-pin SOIC construction supports conventional surface-mount assembly.
The internal PLL allows the circuit to derive a stable clock relationship from the incoming high-speed stream rather than relying on a separate fixed-frequency source. In an AnyRate implementation, the recovery function must maintain alignment across a broad range of line rates, making the SY87701VZC appropriate for network interfaces, telecom backplanes, and legacy optical-network equipment. PECL signal levels provide a high-speed differential-style logic environment commonly used in telecom and data-communication systems.
Typical applications include OC-3 and OC-12 SONET/SDH interfaces, ATM equipment, Ethernet network interfaces, FDDI links, and Fibre Channel transceivers. The 1.25 Gbps upper rate aligns with widely deployed Gigabit-class transport links, while the lower operating range allows the same recovery architecture to address slower network streams.
Designers should verify input logic thresholds, output interface levels, supply sequencing, reference-component values, and loop bandwidth against the manufacturer application circuit before releasing a PCB. Differential signal routing, short return paths, controlled-impedance geometry, and separation from high-current switching circuitry are especially important when recovering timing from marginal data signals.
This page organizes the manufacturer datasheet characteristics, sourcing information, application guidance, design cautions, and verified replacement status into a compact engineering reference. It also distinguishes a true pin-compatible replacement from devices that are merely functionally similar, helping PCB designers avoid unnecessary respins or signal-integrity changes.
드롭인 대체품: SY87701VZC — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청SY87701VZC 사양
| Device Type | Clock and Data Recovery IC with Multiplexer |
| Maximum Data Rate | 1.25 Gbps |
| Operating Data Rate Range | 32 Mbps to 1250 Mbps |
| Supply Voltage Options | 3.3 V or 5 V |
| Maximum Supply Voltage | 5 V |
| Input Interface | PECL |
| Output Count | 1 output |
| PLL | Yes |
| Primary Applications | Ethernet, SONET/SDH, and ATM |
| Supported Protocol Applications | OC-3, OC-12, ATM, FDDI, and Fibre Channel |
| 패키지 | 28-pin SOIC |
| 실장 유형 | Surface Mount |
| 인터페이스 유형 | Serial |
| Time Format | Binary |
| Date Format | Binary |
| Peak Reflow Compatible | No at 260 C |
SY87701VZC 28-pin soic 핀 구성 가이드
SY87701VZC(28-pin soic 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: SY87701VZC.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
SY87701VZC 적합 용도: 6 애플리케이션s: OC-3 and OC-12 SONET Interfaces, ATM Network Interface Equipment, FDDI Network Interfaces, Fibre Channel Interface Designs, Gigabit Ethernet Physical Interfaces, High-Speed Telemetry Line Cards.
OC-3 and OC-12 SONET Interfaces
The SY87701VZC fits SONET feeder and tributary interfaces that require a clock derived from the received data rather than an unrelated fixed-frequency oscillator. According to the manufacturer datasheet, the device recovers timing across 32 Mbps to 1.25 Gbps and supports OC-3 and OC-12 applications. Its PECL input and integrated PLL allow it to establish the required clock-to-data relationship in high-speed telecom hardware. The 28-SOIC package also provides a practical assembly option for multi-board line-card designs. Before implementation, confirm the system’s jitter mask, reference network, logic thresholds, and recovered-clock routing against the manufacturer application circuit.
ATM Network Interface Equipment
The SY87701VZC is suitable for ATM interface electronics where incoming serial traffic must be accompanied by a synchronized clock. According to the manufacturer datasheet, its AnyRate recovery range of 32 Mbps to 1.25 Gbps covers ATM service rates and related transport paths, while the PLL provides the timing relationship between data and clock. A single recovered-clock output makes the device useful where the architecture does not require multiple independent clock outputs. Board-level implementation should include controlled-impedance routing, careful return-path design, and separation between the recovery section and noisy switching circuitry to reduce timing jitter.
FDDI Network Interfaces
The SY87701VZC can support FDDI interface designs that require continuous clock-and-data alignment as data passes through a network physical layer. According to the manufacturer datasheet, FDDI is one of the named applications, and the same-family AnyRate architecture operates from 32 Mbps through 1.25 Gbps. This makes the device appropriate for legacy or long-life FDDI equipment where clock recovery must remain associated with the incoming stream. Because FDDI systems can impose strict timing and jitter requirements, use the manufacturer reference circuitry and verify the selected external component values before releasing production hardware.
Fibre Channel Interface Designs
The SY87701VZC is applicable to Fibre Channel interface electronics operating near the upper end of its 1.25 Gbps recovery range. According to the manufacturer datasheet, Fibre Channel is an explicitly supported application and the device includes a PLL for recovering clock timing from the incoming serial data. This architecture is useful in line cards and concentrators where a stable recovered clock is needed by downstream serialization or processing circuitry. PCB implementation should pay particular attention to transmission-line geometry, via stubs, reference-clock integrity, and power decoupling because these factors directly influence jitter and error margin.
Gigabit Ethernet Physical Interfaces
The SY87701VZC can be considered for Ethernet interface blocks that need AnyRate timing recovery at rates as high as 1.25 Gbps. According to the manufacturer datasheet, Ethernet is a primary application, and the recovered clock remains derived from the incoming data stream. This is valuable in older network-interface designs where an external reference or a separate recovery circuit would add complexity. Engineers should verify that the PECL input stage, recovered-clock output arrangement, and PLL loop settings meet the Ethernet PHY timing budget. Use the manufacturer application circuit as the starting point for component selection and board layout.
High-Speed Telemetry Line Cards
The SY87701VZC is suitable for custom telemetry and telecom line cards that carry serial data at rates between 32 Mbps and 1.25 Gbps and require recovered timing. According to the manufacturer datasheet, the device combines clock recovery, multiplexing, a PLL, and a PECL input in one 28-SOIC component. That integration can reduce the number of separate timing blocks in a compact communications subsystem. The principal engineering trade-off is that the circuit must meet the intended protocol’s jitter and reference requirements, so system-level timing simulation and careful separation of high-speed and power-return paths remain necessary.
엔지니어링 참조 데이터: SY87701VZC — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Brand | Microchip Technology |
| Package | 28-pin SOIC |
| Device Type | Clock and Data Recovery IC with Multiplexer |
| Operating Data Rate | 32 Mbps to 1250 Mbps |
| Maximum Data Rate | 1.25 Gbps |
| Supply Voltage | 3.3 V or 5 V |
| Input Interface | PECL |
| Output Count | 1 output |
| PLL | Yes |
| Primary Applications | Ethernet, SONET/SDH, and ATM |
설계 노트
Route the PECL input and recovered-clock paths as controlled-impedance transmission lines rather than ordinary point-to-point traces. Keep via stubs minimal, provide a continuous return path, and match interface geometry to the board stack-up. Because clock recovery can amplify timing errors caused by reflections, discontinuity, or coupled noise, PCB geometry should be reviewed alongside the external resistor and capacitor values shown in the manufacturer application circuit.
Place the bypass capacitors required by the manufacturer application circuit directly beside the supply and ground pins. Keep the high-current return path short and separate from the PECL input and reference network to prevent supply movement from appearing as clock jitter. Confirm whether the installed design uses the 3.3 V or 5 V supply option before setting component values, and verify that all connected devices use compatible PECL thresholds.
Do not treat a general-purpose PLL, fixed-frequency oscillator, or functionally similar clock circuit as a drop-in replacement. The SY87701VZC recovery function, pin assignments, PECL interface, supply arrangement, and AnyRate range must all be checked. For a production substitution, request a manufacturer cross-reference and compare jitter, acquisition time, reference requirements, output behavior, and every connected pin before approving the change.
규정 준수 정보
The manufacturer documentation identifies Bellcore, ITU/CCITT, and ANSI application specifications, but no formal environmental or automotive compliance status is stated for this part.