SY87701LZG - 1.25Gbps AnyRate CDR | Microchip | 28-SOIC
MPN： SY87701LZG ✗ 停產SY87701LZG 概覽
A clock and data recovery integrated circuit is a timing-recovery semiconductor that extracts a usable clock from a serial data stream and aligns recovered timing with the incoming data. The CDR belongs to the clock and timing IC hierarchy, where it complements clock generators, buffers, phase-locked loops, and other clock-management circuitry used in telecommunications and digital data links.
The SY87701LZG operates from a 3.3 V power supply and recovers clock and data from serial NRZ streams spanning 32 Mbps to 1.25 Gbps. Its AnyRate operating concept allows one clock-and-data recovery function to serve a broad range of line rates. The device includes one clock output according to the product classification for the 28-SOIC package.
The core engineering value of the SY87701LZG is interface consolidation. Combining clock recovery with data handling in one dedicated IC can reduce the number of separate timing components required around a high-speed serial transceiver. Its stated compliance with Bellcore, ITU/CCITT, and ANSI specifications supports use in telecom-oriented designs, including OC-3, OC-12, ATM, and FDDI applications.
Typical uses include SONET/SDH line interfaces, ATM equipment, Ethernet links, FDDI systems, and other optical-transport paths operating up to 1.25 Gbps. The device is particularly relevant where the receiver must reconstruct timing from an incoming NRZ stream rather than relying on a separate source-synchronous clock.
Design work should center on signal integrity, supply decoupling, input/output termination, and correct implementation of the manufacturer's reference interface. Because this is a high-speed timing device, trace geometry, return paths, connector transitions, and ground-plane continuity can materially affect recovered-clock quality even when the nominal data rate is within specification.
This page consolidates the device classification, supported data-rate range, voltage, package, application coverage, verified sourcing links, and engineering guidance into one reference for evaluating the SY87701LZG in clock-and-data-recovery designs.
直接替換替代品，適用於 SY87701LZG — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
SY87701A
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SY87701LZG 規格
| Manufacturer | Microchip Technology |
| Device Type | Clock and Data Recovery (CDR) integrated circuit |
| Product Function | Clock generation and clock/data recovery from an NRZ serial stream |
| Minimum Data Rate | 32 Mbps |
| Maximum Data Rate | 1.25 Gbps |
| Data Format | NRZ |
| 供應電壓 | 3.3 V |
| Recovered Clock Outputs | 1 output |
| 封裝 | 28-pin SOIC |
| Package Width | 7.50 mm |
| Package Body Length | 0.295 inch |
| Primary Applications | Ethernet, SONET/SDH, and ATM applications |
| Standards Compatibility | Bellcore, ITU/CCITT, and ANSI specifications |
| Referenced Network Applications | OC-3, OC-12, ATM, and FDDI |
| Temperature Grade | Industrial temperature |
| 安裝類型 | Surface mount |
SY87701LZG 0.295 inch 腳位配置指南
SY87701LZG（0.295 inch 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： SY87701LZG.
請參閱 資料表 以查看完整腳位配置。
典型應用
SY87701LZG 適用於 6 應用s: SONET/SDH Optical Interfaces, ATM Network Equipment, 1.25 Gbps Serial Data Links, OC-3 and OC-12 Transport Cards, FDDI Network Interfaces, High-Speed Telemetry and Test Equipment.
SONET/SDH Optical Interfaces
The SY87701LZG fits SONET/SDH equipment because it recovers clock and data from NRZ streams at rates up to 1.25 Gbps and is specifically associated with telecom interface standards. It can sit between a high-speed serial transceiver and the timing domain of an FPGA, ASIC, or line-card controller. The main design requirement is to reproduce the manufacturer reference interface and validate jitter, eye opening, and clock quality through the complete optical path. Recovery performance must remain acceptable across the intended line rate rather than only at the maximum 1.25 Gbps data rate.
ATM Network Equipment
The SY87701LZG is appropriate for ATM interface blocks that require regenerated timing from incoming serial data. Its AnyRate range from 32 Mbps to 1.25 Gbps allows it to support multiple ATM-related traffic classes within one product family. In an ATM line card, the CDR can recover the serial clock for a controller or FPGA while the data path is passed through or otherwise conditioned. The implementation should preserve controlled impedance and a continuous ground reference because timing recovery can be impaired by reflections and jitter introduced between the transceiver, connector, and device.
1.25 Gbps Serial Data Links
At the 1.25 Gbps end of its operating range, the SY87701LZG can provide clock-and-data recovery for a serial link that does not carry an independent source-synchronous clock. Its 3.3 V supply and 28-pin SOIC package suit multirate interface hardware, while the NRZ input format aligns with common high-speed serial transceivers. Designers should examine jitter tolerance and loop bandwidth in the manufacturer datasheet, then verify the recovered signal at the system level using the actual channel length, connector, shielding, and return-loss characteristics.
OC-3 and OC-12 Transport Cards
The SY87701LZG is explicitly associated with OC-3 and OC-12 applications in the manufacturer datasheet, making it relevant to optical transport card clocking. It can recover timing from a high-speed serial stream and present a usable clock to downstream digital logic. Deployment requires careful separation between sensitive clock paths and noisy switching circuitry, along with short ground-return connections and stable decoupling. For fielded telecom equipment, validate temperature behavior, component qualification, and long-term availability against the required system qualification process.
FDDI Network Interfaces
The SY87701LZG supports FDDI-related network interface use cases because its clock-and-data recovery function is rated for serial NRZ operation across the required data-rate class. In an FDDI receiver path, the device can reconstruct timing when the incoming data does not provide a separately usable clock. Board implementation should follow the manufacturer's reference circuit and maintain controlled impedance from the line transceiver through the CDR. System validation should include recovered-clock jitter, bit-error performance, and behavior under repeated link initialization.
High-Speed Telemetry and Test Equipment
The SY87701LZG can support laboratory and industrial telemetry modules that receive serial data without a continuous forward clock. Its 32 Mbps to 1.25 Gbps AnyRate range allows the same timing architecture to cover several instrument or backplane link rates. The CDR should be placed near the receiving transceiver to minimize the high-speed trace length between them, while the recovered clock is routed to the counter, FPGA, or acquisition logic with matched impedance. Triggering and calibration circuits should be evaluated for deterministic jitter contribution during timing measurements.
工程參考資料，適用於 SY87701LZG — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | SY87701A |
|---|---|---|
| Package | 28-SOIC | 28-SOIC |
| Brand | Microchip Technology | Microchip Technology |
| Device Type | Clock and Data Recovery IC | Lower-power AnyRate CDR |
| Minimum Data Rate | 32 Mbps | 32 Mbps |
| Maximum Data Rate | 1.25 Gbps | 1.25 Gbps |
| Data Format | NRZ | NRZ |
| Primary Applications | Ethernet, SONET/SDH, and ATM | Clock and data recovery applications |
主要差異化特點
- Broad AnyRate operating range (對比SY87701A)
- Established 3.3 V application position (對比SY87701A)
- Telecom interface coverage (對比SY87701A)
設計說明
Place the SY87701LZG close to the receiving transceiver and route the serial data input over a short, continuous-impedance path. Avoid stubs, test pads without defined terminations, and changes of reference plane near the input. Keep the recovered-clock route away from switching nodes and noisy inductors because timing jitter can be introduced even when the CDR remains within its stated operating rate.
Build the supply network around the manufacturer reference circuit, including the recommended local bypass capacitors and short connection to the device. A solid ground plane under and around the SOIC helps control return current and reduces susceptibility to common-mode noise. Validate the layout with signal-integrity simulation using the actual trace dimensions, connector model, and package parasitics before manufacturing.
Do not treat the maximum 1.25 Gbps rating as proof that every channel or optical module will close the system eye. Check input amplitude, jitter, rise and fall times, return loss, and the data pattern used during validation. Also avoid assuming that the lower-power SY87701A is automatically interchangeable; compare every pin, supply current, timing specification, and external component before releasing a substitution.
合規資訊
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations are stated in the product information. The SY87701A is identified by the manufacturer datasheet as a lower-power alternative for new designs.