SY87700VSC - 175Mbps CDR | Microchip Technology
MPN: SY87700VSC ✗ انتهى عمره الإنتاجيSY87700VSC نظرة عامة
A clock and data recovery IC, or CDR, belongs to the clock and timing IC family within application-specific clock and timing semiconductors. It extracts a usable clock from a serialized data stream and can also recover or retime data when the system requires a cleaner relationship between clock and data. In telecommunications equipment, this function supports synchronization across high-speed network interfaces.
The SY87700VSC supports data rates of 32 Mbps through 175 Mbps, making it applicable to legacy and emerging SONET/SDH, ATM, and Ethernet transport paths. Its 3.3 V and 5 V operating capability provides supply-voltage flexibility, while the differential PECL interface supports high-speed, noise-sensitive transmission links. The device is identified as a phase-locked-loop clock and data recovery product in the supplied cross-reference data.
The integrated PLL architecture recovers timing information and establishes the relationship between the incoming serial stream and the recovered output. According to the manufacturer datasheet, the PLL complies with the proposed SONET/SDH jitter specifications in Bellcore GR-253-CORE, Issue 2, December 1995 and ITU-T Recommendation G.958 when used with differential inputs and outputs. Those standards appear directly in the supplied datasheet source.
Typical deployments include SONET/SDH line-interface equipment, ATM switching and transmission systems, Ethernet network-interface modules, and telecommunications line cards. The 175 Mbps upper rate and one-output configuration are particularly relevant to designs that need recovered timing for an optical or copper transmission section rather than a general-purpose multi-channel clock synthesizer.
Designers should preserve the differential input and output topology specified by the manufacturer and validate transmission-line impedance, termination, and jitter performance in the final board environment. The exposed-pad package also requires careful thermal and layout treatment so that heat is transferred through the pad and ground-plane area rather than concentrated beneath the device.
This page consolidates the verified 175 Mbps, 32 Mbps to 175 Mbps, 3.3 V/5 V, differential PECL, package, application, and standards information into an engineering-oriented product record. It also distinguishes verified characteristics from unspecified electrical details and avoids presenting unavailable pricing or pin data as confirmed facts.
بدائل مباشرة لـ SY87700VSC — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
لا تتوفر بدائل متوافقة تمامًا لهذا المنتج.
اطلب بدائلSY87700VSC المواصفات
| Device Type | AnyRate clock and data recovery IC |
| Maximum Data Rate | 175 Mbps |
| Data Rate Range | 32 Mbps to 175 Mbps |
| Recovered Clock Outputs | 1 output |
| Supply Voltage Operation | 3.3 V / 5 V |
| Input Interface | Differential PECL |
| Output Interface | Differential PECL |
| Architecture | Phase-locked-loop clock and data recovery |
| العلبة | 28-pin SOIC with exposed pad |
| عدد الأطراف | 28 pins |
| نوع التركيب | Surface mount |
| Ethernet Compatibility | Supported application |
| SONET/SDH Compatibility | Supported application |
| ATM Compatibility | Supported application |
| Bellcore Jitter Specification | GR-253-CORE, Issue 2, December 1995 |
| ITU-T Jitter Recommendation | G.958 |
دليل تكوين أطراف SY87700VSC 28-pin soic with exposed pad
تكوين الأطراف لـ SY87700VSC (حزمة 28-pin soic with exposed pad). يتم تعريف ترقيم الأطراف والوظائف ومخططات التوصيل في ورقة البيانات الفنية من الشركة المصنعة. راجعها للحصول على البصمة الدقيقة وإرشادات اللحام.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ SY87700VSC.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
SY87700VSC مناسب لـ 6 التطبيقs: SONET/SDH Transmission Equipment, ATM Network Interface Modules, Ethernet Backplane and Line Cards, Telecommunications Line Cards, Clock-and-Data Recovery Test Equipment, Industrial High-Speed Data Links.
SONET/SDH Transmission Equipment
The Microchip Technology SY87700VSC fits a SONET/SDH line interface that must recover timing from a high-speed serial stream. Its verified 32 Mbps to 175 Mbps operating range and one recovered-clock output provide a defined function for network transport equipment, while the differential PECL interfaces support high-speed clock and data paths. The manufacturer datasheet states that the PLL complies with Bellcore GR-253-CORE, Issue 2, December 1995 and ITU-T Recommendation G.958 when used with differential inputs and outputs. Designers should preserve those differential conditions, validate jitter in the complete channel, and account for the exposed-pad thermal and grounding requirements of the 28-pin SOIC package.
موصى به
ATM Network Interface Modules
The SY87700VSC is suitable for ATM equipment requiring clock recovery from serialized data at rates within its verified 32 Mbps to 175 Mbps range. The AnyRate CDR architecture, single recovered output, and differential PECL signal path align with a dedicated transmit or receive timing section rather than a general-purpose clock generator. In implementation, the differential traces should be routed as controlled-impedance connections with the manufacturer’s specified termination network. Signal-integrity and jitter validation must cover the connector or optical-driver path, because device compliance with GR-253-CORE and G.958 is conditional on the prescribed differential operating conditions.
موصى به
Ethernet Backplane and Line Cards
The SY87700VSC can be evaluated for Ethernet line-card or backplane timing sections operating at a data rate accepted by its verified 32 Mbps to 175 Mbps range. Its recovered-clock output provides a dedicated timing reference, and the differential PECL interface can fit legacy high-speed communication architectures. The design must ensure that the selected Ethernet lane rate, coding scheme, clock topology, and loss budget are compatible with this older AnyRate CDR architecture. Because verified information does not provide detailed Ethernet BER or jitter-margin figures, bench validation is required before production release.
موصى به
Telecommunications Line Cards
A telecommunications line card requiring recovered data and clock can use the SY87700VSC within the supported 32 Mbps to 175 Mbps range. The device’s single output, 3.3 V or 5 V operation, and differential PECL interfaces are useful when the line-card architecture includes external line drivers, mux components, or optical interfaces. The exposed pad should be tied and thermally coupled according to the manufacturer datasheet rather than treated as an unused mechanical feature. Since the supplied data does not specify total-current limits, operating temperature, or package thermal resistance, those details must be confirmed from the full datasheet before thermal and power budgeting.
موصى به
Clock-and-Data Recovery Test Equipment
The SY87700VSC can serve as the recovery element in a test fixture or communications analyzer that recreates SONET/SDH, ATM, or related serial links. Its verified range from 32 Mbps through 175 Mbps and differential PECL interfaces allow repeatable testing of link timing without relying on a full commercial network. Test-equipment design should include controllable stimulus, calibrated measurement paths, and a known-good reference clock. Because the supplied data does not specify loopback modes, jitter-transfer curves, or deterministic jitter limits, these operating details must be extracted from the manufacturer datasheet before defining the instrument’s measurement capability.
موصى به
Industrial High-Speed Data Links
The SY87700VSC may be used in an industrial control or data-acquisition enclosure that requires recovery of timing from a legacy differential serial stream at a supported rate between 32 Mbps and 175 Mbps. Differential PECL signaling can support short controlled-impedance interconnects, while the single recovered output provides one timing reference. Industrial implementation should verify environmental temperature limits, power-supply tolerances, and EMC behavior because those specifications are not included in the supplied verified excerpts. PCB layout should preserve symmetric differential geometry, minimize stubs, and provide the recommended exposed-pad thermal connection to maintain reliable performance in a potentially noisy enclosure.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ SY87700VSC — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج |
|---|---|
| Package | 28-pin SOIC with exposed pad |
| Brand | Microchip Technology |
| Device Type | AnyRate clock and data recovery IC |
| Maximum Data Rate | 175 Mbps |
| Data Rate Range | 32 Mbps to 175 Mbps |
| Output Count | 1 output |
| Supply Voltage | 3.3 V / 5 V |
| Interface | Differential PECL inputs and outputs |
| Target Applications | Ethernet, SONET/SDH, and ATM |
| Architecture | Phase-locked-loop clock and data recovery |
أبرز الفروقات
- Broad verified operating-rate range in an AnyRate CDR (مقابلSY87700LHI)
- One-output clock-and-data recovery configuration (مقابلSY87700LHG-TR)
- Dual 3.3 V and 5 V operating capability (مقابلSY87700LHI)
- Explicit differential-use basis for telecommunications jitter specifications (مقابلSY87700LHG-TR)
ملاحظات التصميم
Route the differential PECL inputs and outputs as short, symmetric pairs with continuous reference planes and no unnecessary stubs. The manufacturer's stated GR-253-CORE and ITU-T G.958 compliance is conditional on differential operation, so changes to topology, connector launches, or return paths can alter the achieved jitter behavior. Keep external termination and coupling components close to the device and validate the completed PCB with the intended transceiver or load.
Treat the exposed pad as both an electrical connection and a thermal path. Follow the manufacturer's layout guidance for the pad connection and provide uninterrupted copper beneath the package where permitted by the pin configuration. The supplied excerpts do not provide junction temperature, total power dissipation, or thermal resistance, so a complete thermal calculation requires those datasheet values and the actual 3.3 V or 5 V operating condition.
Preserve the manufacturer-defined differential interface environment from source to termination. Differential PECL routing should maintain controlled impedance, adequate spacing from unrelated clocks and switching nodes, and an uninterrupted return path. Because the part is intended for 32 Mbps to 175 Mbps clock and data recovery, perform eye, jitter, and BER-oriented validation across operating temperature and supply tolerance rather than inferring compliance from data rate alone.
Plan the 3.3 V or 5 V rail according to the exact pin and termination arrangement shown in the manufacturer datasheet. PECL interfaces may require coordinated voltage-domain treatment, so the supply cannot be assumed to be interchangeable without checking every input and output. Keep high-current return paths close to the device and use local decoupling recommendations from the datasheet; no verified current consumption or capacitor values were supplied for this record.
معلومات الامتثال
The verified manufacturer datasheet references Bellcore GR-253-CORE, Issue 2, December 1995 and ITU-T Recommendation G.958 for differential operating conditions. No verified RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification declaration was supplied.
