SY87701VZH - 1.25Gbps AnyRate CDR | Microchip Technology
Артикул: SY87701VZH ✓ АктивенSY87701VZH Обзор
A clock and data recovery IC is a timing IC that reconstructs a usable clock from a serial data stream whose original clock has become embedded in the data or has otherwise become unusable. In the broader semiconductor hierarchy, a CDR belongs to clock and timing ICs, which support communication ICs and network infrastructure equipment. The SY87701 is designed for protocol-independent recovery over a broad speed range rather than one fixed line rate.
The primary operating range is 32 Mbps to 1.25 Gbps using NRZ signaling. The device can recover clock and data or generate clock from a suitable input stream, giving system designers flexibility across optical, serial-network, and test-equipment signal paths. Its 3.3 V and 5 V supply options broaden its use across communications equipment, while the single recovered-clock output provides a straightforward clock-recovery function.
The SY87701 family is associated with Bellcore, ITU/CCITT, and ANSI applications including OC-3, OC-12, ATM, and FDDI environments. These references describe the communications standards and legacy transport systems addressed by the device; they do not imply that every downstream equipment design automatically meets a complete compliance specification. System designers must still control the source, data path, jitter tolerance, and output interface.
Typical uses include Ethernet line cards, SONET/SDH transport modules, ATM equipment, clock-recovery modules, and instrumentation that accepts NRZ serial data. In these systems, the recovered clock can provide a timing reference for deserializers, controllers, or downstream digital logic. Its AnyRate capability is especially useful when a product family must support several standardized line rates with one clock-recovery device.
Designers should preserve the differential data and clock topology recommended by the manufacturer datasheet, provide clean return paths, and validate timing margins across the complete 32 Mbps to 1.25 Gbps range. Input amplitude, jitter, duty-cycle distortion, and board loss can constrain usable margin even when the nominal data-rate range is supported.
This product page combines verified manufacturer and distributor information with package, sourcing, application, and design guidance. It also distinguishes the tube-packaged SY87701VZH from related ordering information and documents the limits of the available substitute and compliance data rather than inferring unverified drop-in replacements.
Аналоги без доработки для SY87701VZH — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
SY87701
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
SY87701VZH Характеристики
| Product Type | AnyRate Clock and Data Recovery IC |
| Minimum Data Rate | 32 Mbps |
| Maximum Data Rate | 1.25 Gbps |
| Data Signaling Format | NRZ |
| Power Supply Options | 3.3 V or 5 V |
| Recovered Clock Outputs | 1 output |
| Clock Generation Support | Up to 1.25 Gbps |
| Clock and Data Recovery Range | 32 Mbps to 1.25 Gbps |
| Корпус | 28-pin SOIC, 0.3 inch |
| Package Type | Surface Mount |
| Shipping Package | Tube |
| Ethernet Support | Supported application |
| SONET/SDH Support | Supported application |
| ATM Support | Supported application |
| Referenced Communications Standards | Bellcore, ITU/CCITT, and ANSI |
Руководство по цоколевке SY87701VZH в корпусе tube
Цоколевка для SY87701VZH (корпус tube). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для SY87701VZH.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
SY87701VZH подходит для 6 применениеs: Ethernet Serial-Link Recovery, SONET/SDH Transport Equipment, ATM Interface Modules, OC-3 and OC-12 Optical Transport, FDDI Network Interface Equipment, Communications Test and Measurement.
Ethernet Serial-Link Recovery
The SY87701VZH fits Ethernet equipment that requires clock recovery from an NRZ serial stream operating between 32 Mbps and 1.25 Gbps. Its AnyRate operating range allows one clock-and-data-recovery device to support multiple line rates, while the single recovered-clock output provides a timing reference for downstream control or digital logic. The manufacturer-related listing explicitly identifies Ethernet as a target application. Designers should still validate source amplitude, jitter, input data format, and board-level timing margin across every line rate that the product supports.
SONET/SDH Transport Equipment
The SY87701VZH is applicable to SONET/SDH transport systems that need protocol-independent timing recovery from serial NRZ data. Its verified upper rate of 1.25 Gbps and 32 Mbps lower bound align with the family description of clock recovery for high-speed telecommunications links. The recovered clock can support deserializer, framing, or payload-processing circuitry when the complete design meets the relevant system timing requirements. Compliance cannot be inferred from chip selection alone, so line-card jitter, loss, shielding, and interface testing remain essential engineering activities.
ATM Interface Modules
ATM equipment can use the SY87701VZH to recover a usable clock from incoming NRZ serial data at rates within the supported 32 Mbps to 1.25 Gbps range. The SY87701 family is explicitly associated with ATM applications, making the device relevant to legacy and specialized asynchronous-transfer-mode interfaces. Its 3.3 V or 5 V supply choices permit integration into legacy telecommunications boards, subject to the input thresholds and output levels specified in the manufacturer datasheet. System validation should include worst-case jitter, deterministic latency, and recovered-clock duty-cycle measurements.
OC-3 and OC-12 Optical Transport
The SY87701VZH can support timing recovery in communications paths associated with OC-3 and OC-12 transport applications, as stated in the verified family description. A recovered clock derived from the incoming NRZ stream can synchronize downstream digital sections of a line card. The device's 1.25 Gbps maximum rate provides useful coverage for these high-speed transports, but optical-path implementation involves additional components and engineering work. Designers should characterize the electrical interface presented to the CDR, preserve return paths, and verify operation across temperature and supply tolerances.
FDDI Network Interface Equipment
The SY87701VZH is identified with FDDI applications and therefore is relevant to legacy FDDI interface designs requiring clock and data recovery from a serial NRZ stream. Its verified range from 32 Mbps to 1.25 Gbps encompasses the stated family application set and provides a protocol-independent timing block. One recovered clock output is available for downstream circuit synchronization. Because the verified sources do not provide complete logic thresholds, jitter limits, or temperature data, engineers must obtain those values from the manufacturer datasheet and confirm them on the intended board before production release.
Communications Test and Measurement
The SY87701VZH can serve as a clock-recovery element in test equipment that accepts NRZ serial data and must regenerate timing for measurement or stimulus paths. Its 32 Mbps to 1.25 Gbps AnyRate range allows one device to cover a broad set of communication test rates, and clock-generation capability adds flexibility in specialized laboratory setups. The 28-SOIC package and 3.3 V or 5 V supply options support compact instrument designs. Practical implementation requires controlled input amplitude and source termination, with recovered-clock jitter and frequency accuracy evaluated using the instrument's measurement bandwidth.
Справочные инженерные данные для SY87701VZH — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | SY87701 |
|---|---|---|
| Package | 28-pin SOIC, 0.3 inch | 28-pin SOIC, 0.3 inch |
| Brand | Microchip Technology | Microchip Technology |
| Product Type | AnyRate Clock and Data Recovery IC | Clock and Data Recovery IC |
| Minimum Data Rate | 32 Mbps | 32 Mbps |
| Maximum Data Rate | 1.25 Gbps | 1.25 Gbps |
| Data Format | NRZ | NRZ |
| Supply Voltage Options | 3.3 V or 5 V | 3.3 V or 5 V |
| Clock Generation Support | Up to 1.25 Gbps | Supported |
| Target Applications | Ethernet, SONET/SDH, and ATM | OC-3, OC-12, ATM, FDDI, and clock recovery |
Ключевые отличия
- Broad AnyRate operating range (против SY87701)
- Flexible communications supply options (против SY87701)
- Recovery and generation in one timing device (против SY87701)
Заметки по проектированию
Route the high-speed NRZ data input and recovered-clock path as short, continuous traces, with a continuous ground-reference plane beneath the interface. Avoid introducing unnecessary stubs, test pads, or long branch paths between the source device and the SY87701VZH. The verified records do not provide complete input thresholds or recommended trace geometry, so final impedance and topology guidance should come from the manufacturer datasheet and the actual source-device documentation.
Validate recovered-clock timing and data integrity at 32 Mbps and 1.25 Gbps, including intermediate rates used by the product. Source amplitude, jitter, duty-cycle distortion, connector loss, and return-path discontinuities can reduce usable timing margin even when the nominal rate falls within the supported range. Measure at the CDR pins rather than only at the transmitter because PCB loss and impedance mismatches can materially alter the signal delivered to the device.
Decouple the selected 3.3 V or 5 V supply close to the device and provide a low-impedance return for every supply connection. The verified data does not identify the required input capacitance, output-noise specifications, or power-up sequence, so the manufacturer datasheet must be used for final capacitor selection. Keep analog and digital return currents separated where practical, and avoid sharing narrow neck routes between the CDR and unrelated switching circuitry.
Do not treat the base SY87701 ordering code or the SY87701VZH-TR tape-and-reel suffix as an unconditional substitute without checking the manufacturer ordering-information table. The available results identify the same device family and speed range, but complete temperature grade, pin configuration, and package details were not captured. Confirm those items before changing the BOM or releasing a replacement order.
Информация о соответствии
The supplied verified records do not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is marked not applicable because this is a communications clock and timing IC rather than an automotive-qualified component; no automotive qualification claim was provided.
