SY87700LZI - 175 Mbps AnyRate CDR | Microchip | 28-SOIC
Teilenummer: SY87700LZI ✗ AbgekündigtSY87700LZI Übersicht
A clock and data recovery IC, commonly called a CDR, is a timing-integrity device that extracts a coherent clock from a serial data stream and regenerates data aligned to that clock. In the electronic-component hierarchy, a CDR belongs to clock and timing ICs, then to clock-data recovery and PLL-based timing conversion, and ultimately to integrated circuits used for signal integrity and network timing. This distinction from a general-purpose oscillator is important: the SY87700LZI is designed to recover timing directly from incoming NRZ data rather than merely generate a free-running reference frequency.
The verified device information identifies a 3.3 V power supply, an operating data range of 32–175 Mbps, PECL input, and PECL or TTL output. The industrial temperature rating extends to +85 °C. Its two internal PLLs support clock generation and clock recovery, while its AnyRate architecture allows the recovered timing system to accommodate changing line rates through the documented operating range. The single-output organization is indicated by the distributor classification “Clock and Data Recovery (CDR), Multiplexer IC.”
The SY87700LZI is intended for telecommunications and data-communication equipment where incoming serial streams must be retimed before reaching a downstream receiver, framer, or switching element. Suitable contexts include SONET/SDH line-interface equipment, ATM equipment, Ethernet-related interfaces, and optical or electrical backplanes operating within the supported 32–175 Mbps range. Its AnyRate capability can simplify designs that must support more than one standardized line rate without relying on a separate fixed-frequency clocking strategy.
Design implementation requires careful attention to high-speed differential routing, PECL interface termination, supply decoupling, return paths, and output-amplitude compatibility. The manufacturer's datasheet states that input jitter tolerance is defined using the peak-to-peak sinusoidal jitter amplitude that causes an equivalent 1 dB optical or electrical power penalty; this definition should be used when evaluating system margin rather than assuming a simple bit-period budget. The 28-SOIC package also requires adequate lead spacing and assembly clearance during routing.
This product data consolidates verified device specifications, source links, selection trade-offs, and application guidance beyond a raw distributor listing. It also clearly distinguishes confirmed characteristics from parameters that require confirmation in the manufacturer datasheet before schematic release, qualification, or production procurement.
Drop-in-Alternativen für SY87700LZI – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Für dieses Produkt sind keine Drop-in-Alternativen verfügbar.
Alternativen anfordernSY87700LZI Technische Daten
| Product Type | AnyRate clock and data recovery IC |
| Funktion | Clock and data recovery from 32–175 Mbps NRZ data streams |
| Data Rate Range | 32–175 Mbps |
| Versorgungsspannung | 3.3 V |
| Maximum Supply Voltage | 3.45 V |
| Input Interface | PECL |
| Output Interface | PECL or TTL |
| Recovered Clock Outputs | 1 output |
| On-Chip PLL Count | 2 PLLs |
| PLL Functions | Clock generation and clock recovery |
| Primary Applications | Ethernet, SONET/SDH, and ATM applications |
| Industrial Temperature Range | Up to +85 °C |
| Gehäuse | 28-SOIC, 0.295 inch body width, 7.50 mm |
| Montageart | Surface mount |
| Input Current | 100 µA |
SY87700LZI 28-soic, 0.295 inch body width, 7.50 mm Pinbelegungsleitfaden
Pinbelegung für SY87700LZI (28-soic, 0.295 inch body width, 7.50 mm-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für SY87700LZI.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
SY87700LZI ist geeignet für 6 Anwendungs: SONET and SDH Line Interfaces, ATM Backplane Interface, Ethernet Timing Recovery, Optical Communications Equipment, High-Speed Data Acquisition Front Ends, Industrial Telecommunications Modules.
SONET and SDH Line Interfaces
The SY87700LZI fits serial line-interface equipment that must recover a usable clock from an incoming 32–175 Mbps NRZ stream. According to the Microchip manufacturer datasheet, the device supports SONET/SDH applications and uses separate on-chip PLLs for clock generation and recovery. Place it where the line receiver produces a high-speed data signal that must be retimed before reaching a framer, mapper, or decision circuit. Its single recovered-clock output and documented industrial limit of +85 °C suit equipment operating beyond consumer-temperature environments. Designers should still verify protocol-specific jitter margin, input amplitude, and output timing against the complete system specification before using the device in a new SONET or SDH design.
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ATM Backplane Interface
The SY87700LZI is applicable to ATM equipment carrying NRZ streams within its documented 32–175 Mbps operating range. The device recovers clock and data and can generate a separate clock, allowing a backplane subsystem to present synchronized timing to downstream logic. Its two internal PLLs provide the clock-generation and clock-recovery functions identified in the manufacturer datasheet. The 28-SOIC package keeps the component practical for multilayer communication boards, although high-speed traces still require short, continuous routing and a solid reference plane. Before implementation, confirm that the selected ATM line rate falls inside the supported range and validate the complete interface against the relevant system timing and jitter requirements.
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Ethernet Timing Recovery
The SY87700LZI can support Ethernet-related equipment when the incoming serial data rate falls between 32 Mbps and 175 Mbps and the board needs dedicated clock and data recovery. The Microchip manufacturer datasheet explicitly lists Ethernet among the intended applications, while the device provides one recovered clock output and separate generation and recovery PLLs. The component is most appropriate where an existing line receiver or transceiver requires deterministic retiming before data is passed to framing logic. It is not a complete Ethernet PHY and therefore does not replace network magnetics, termination, or protocol handling. Confirm the physical-layer rate, electrical levels, latency budget, and recovered-clock quality in the end-to-end design.
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Optical Communications Equipment
The SY87700LZI fits optical and electrical line-card subsystems that require a recovered timing reference from a 32–175 Mbps NRZ data path. The manufacturer describes the CDR around a pair of PLLs, with one performing clock generation and the other clock recovery. This allows the recovered reference to support downstream decision logic while a generated clock can serve another timing function. Because the device’s jitter behavior directly affects link margin, engineers should apply the datasheet definition that input jitter tolerance is the peak-to-peak sinusoidal jitter causing an equivalent 1 dB optical or electrical power penalty. Validate the complete optical or electrical channel, not only the IC, because transmitter and receiver impairments also contribute to the timing budget.
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High-Speed Data Acquisition Front Ends
The SY87700LZI can serve in instrumentation or test equipment that ingests a continuous NRZ stream and requires coherent clock recovery before digital processing. Its 32–175 Mbps range covers several legacy serial and telecommunications links, while the two-PLL architecture supports both recovery and clock generation. Use the recovered output to establish a repeatable sampling relationship for counters, protocol analyzers, or programmable logic. The design must account for deterministic and random jitter, source impedance, input termination, and propagation delay through the FPGA or ASIC. Because the public search data does not state the full timing-error or jitter figures, engineers should consult the official manufacturer datasheet and characterize the source and receiver path before committing to a bandwidth-critical acquisition system.
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Industrial Telecommunications Modules
The SY87700LZI is suitable for industrial communication modules that need deterministic clock recovery from a legacy serial line while operating in an extended-temperature environment. The verified industrial rating reaches +85 °C, and the device supports Ethernet, SONET/SDH, and ATM application contexts. In a compact embedded module, the 28-SOIC package requires careful fanout between a high-speed transceiver and downstream digital logic, while the 3.3 V supply should be decoupled close to the pins. Confirm the exact line rate, signal levels, isolation boundaries, and thermal profile of the enclosure. The SY87700LZI should be treated as the timing-recovery element within a larger interface architecture rather than as a standalone communications transceiver.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SY87700LZI – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt |
|---|---|
| Brand | Microchip Technology |
| Package | 28-SOIC |
| Product Type | AnyRate clock and data recovery IC |
| Supply Voltage | 3.3 V |
| Maximum Supply Voltage | 3.45 V |
| Operating Data Rate | 32–175 Mbps |
| Input Interface | PECL |
| Output Interface | PECL or TTL |
| PLL Count | 2 |
| Recovered Clock Outputs | 1 |
| Industrial Temperature | Up to +85 °C |
| Primary Applications | Ethernet, SONET/SDH, and ATM |
Wichtigste Unterscheidungsmerkmale
- AnyRate timing coverage (vs. SY87700LHI)
- Dedicated generation and recovery PLLs (vs. Generic single-function clock ICs)
- Industrial temperature positioning (vs. Consumer-temperature timing devices)
Designhinweise
Route the PECL input and recovered outputs as short, controlled-impedance traces over a continuous reference plane. Keep the input path away from clocks, switching supplies, and digital return currents, and place any required termination close to the receiving device. Because the SY87700LZI operates up to 175 Mbps, avoid long stubs and unnecessary test pads that create impedance discontinuities. Confirm the final topology against the manufacturer's reference layout and the actual transceiver interface.
Decouple the 3.3 V supply locally and provide a low-impedance return path for every output driver. The verified maximum supply voltage is 3.45 V, so verify the system rail tolerance and startup overshoot before connecting it to the SY87700LZI. Place the principal bypass capacitor close to the device and follow the manufacturer datasheet for additional high-frequency decoupling. Validate rail behavior at the recovered-clock operating state because simultaneous output activity can change the device's instantaneous supply demand.
Build the jitter budget from the complete data path rather than from the CDR in isolation. The manufacturer defines input jitter tolerance using the peak-to-peak sinusoidal jitter that causes an equivalent 1 dB optical or electrical power penalty. Characterize source jitter, channel loss, skew, receiver noise, and the SY87700LZI's contribution under worst-case line rate and temperature. Include margin for clock-generation and clock-recovery loop behavior, which the two-PLL architecture makes especially important in multi-rate systems.
Do not treat the SY87700LHI or SY87700ALHG-TR as direct replacements merely because they share the SY87700 family name. The supplied comparison information identifies 32-pin TQFP packages for those parts, while the SY87700LZI uses a 28-SOIC footprint, so a board redesign and signal review would be required. Also verify whether the lower-power SY87700AL family noted in the datasheet satisfies the required protocol, jitter, and lifecycle objectives before beginning a new design.
Compliance-Informationen
The supplied verified search results do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The industrial temperature rating does not by itself establish AEC-Q100 qualification.
