SY87701LZI - 3.3V 1.25Gbps AnyRate CDR | Microchip Technology
Référence : SY87701LZI ✓ ActifSY87701LZI Présentation
An AnyRate clock and data recovery IC is a timing-recovery component that extracts a usable clock from a serial data stream and retimes the associated data. Its position within the broader semiconductor hierarchy is clock and timing IC → clock and data recovery IC → integrated circuit → semiconductor. The technology is intended for systems where the transmitting clock is not separately available at the receiver or where accumulated timing drift must be continuously corrected.
The verified specifications identify a 3.3V power supply, an operating data-rate range of 32Mbps to 1.25Gbps, and recovery-clock generation up to 1.25Gbps. The SY87701LZI also has an industrial temperature-range option, according to the Micrel datasheet information included in the search results. These characteristics make the device relevant to telecom backplane links, optical transport systems and other high-speed serial interfaces operating with NRZ-coded data.
The Micrel device is described as complying with Bellcore, ITU/CCITT and ANSI specifications for applications such as OC-3 and OC-12. It supports clock and data recovery directly from an NRZ data stream, reducing the need for separate source-synchronous clocking across long or timing-sensitive interconnects. Exact architecture details, loop bandwidth, input sensitivity, jitter tolerance, supply-current limits and pin-level signal definitions are not available in the supplied verified records and therefore require confirmation from the manufacturer datasheet.
Typical applications include SONET or optical-transport equipment, telecom line cards, high-speed backplanes and serial data links requiring recovered clock and data outputs. In an OC-3-class interface, its 1.25Gbps maximum recovery rate provides operating margin above the nominal line rate. In a lower-rate telecom or proprietary serial link, the 32Mbps lower limit allows one device family to cover multiple interface rates when the surrounding system supports the required encoding and reference-clock architecture.
Designers should confirm the exact pin assignment, reference-clock requirements, input and output logic levels, jitter characteristics and recommended decoupling directly from the Micrel datasheet before layout. The 28-SOIC footprint requires careful high-speed routing, short return paths and controlled impedance. Input and output timing must be evaluated for the target data rate because compliance claims alone do not replace board-level signal-integrity validation.
This page consolidates the verified distributor price, availability, package information and core SY87701LZI specifications, then adds practical sourcing, selection and implementation guidance. It also distinguishes verified facts from parameters that still require manufacturer confirmation, helping engineers avoid treating search-result summaries as a substitute for the complete datasheet.
Alternatives de remplacement direct pour SY87701LZI — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesSY87701LZI Spécifications
| Product Type | AnyRate clock and data recovery IC |
| Tension d'alimentation | 3.3 V |
| Minimum Data Rate | 32 Mbps |
| Maximum Data Rate | 1250 Mbps |
| Maximum Recovered Clock Rate | 1250 MHz |
| Data Format | NRZ |
| Temperature Grade | Industrial temperature range |
| Boîtier | 28-pin SOIC (0.295 inch, 7.50 mm width) |
| Type de montage | Surface Mount |
| Telecommunications Compliance | Bellcore, ITU/CCITT and ANSI specifications |
| Application Reference | OC-3 and OC-12 applications |
Guide de configuration des broches du SY87701LZI 28-pin soic (0.295 inch, 7.50 mm width)
Configuration des broches du SY87701LZI (boîtier 28-pin soic (0.295 inch, 7.50 mm width)). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour SY87701LZI.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
SY87701LZI convient pour 6 applications: OC-3 Optical Transport Links, OC-12 Telecom Line Cards, High-Speed Backplane Interfaces, Telecom Data Recovery, Optical Module Receive Chains, Synchronous Serial Data Links.
OC-3 Optical Transport Links
The SY87701LZI fits OC-3-class telecom links because the Micrel datasheet identifies compliance with Bellcore, ITU/CCITT and ANSI specifications for applications including OC-3. Its AnyRate recovery capability covers NRZ streams up to 1.25Gbps, matching the nominal class of the interface while allowing the same device to address lower-rate links. The IC recovers timing and data from the incoming stream and generates a recovered clock up to 1.25Gbps. This reduces the need to route a separate source-synchronous timing signal across the link. Exact reference-clock requirements and jitter performance must be checked in the manufacturer datasheet, while the PCB should provide short, impedance-controlled routing and clean return paths.
Recommandé
OC-12 Telecom Line Cards
The SY87701LZI is relevant to telecom line-card designs requiring compliant clock and data recovery for NRZ-based serial links. The verified Micrel description specifically associates the device with OC-12 applications and states that it complies with Bellcore, ITU/CCITT and ANSI specifications. Its 3.3V supply and operation from 32Mbps to 1.25Gbps provide a defined operating range for telecom timing subsystems. In implementation, the recovered data and clock outputs must meet the line-card channel and timing budgets, including jitter and skew. Layout should isolate high-speed traces from noisy digital and power-conversion sections, and all absolute timing parameters should be validated against the current datasheet.
Recommandé
High-Speed Backplane Interfaces
The SY87701LZI can support proprietary synchronous backplane links when the transmitter does not provide a usable clock at the receiver. Its verified AnyRate range of 32Mbps to 1.25Gbps allows timing recovery across several link rates, while its maximum recovered-clock capability reaches 1.25GHz according to the supplied Micrel summary. The CDR extracts timing from NRZ data and presents recovered clock and data for downstream processing. Backplane implementation must account for insertion loss, reflections, skew and connector discontinuities, because none of those board-level effects are represented by the device's headline data-rate figures.
Recommandé
Telecom Data Recovery
The SY87701LZI is suitable for telecom subsystems that receive an NRZ stream without a separate usable source clock. It recovers both clock and data up to 1.25Gbps, giving downstream logic a locally retimed output for further processing. Its 32Mbps lower operating rate also makes it potentially useful across lower-rate telecom links within the same device family. The principal engineering benefit is that timing is extracted at the receiver, reducing dependence on a separate clock path across the system. Designers should nevertheless confirm the required reference clock, lock behavior, input sensitivity and jitter tolerance because those values are not present in the supplied verified summaries.
Recommandé
Optical Module Receive Chains
The SY87701LZI can be considered for receive chains in telecom optical equipment that need to recover timing from an NRZ data stream. The verified device specification supports clock and data recovery up to 1.25Gbps, aligning with the rate class used by the cited OC-3 and OC-12 applications. It can therefore serve as the timing-recovery element between a receiver data source and subsequent digital processing. The complete implementation must account for optical-module output amplitude, jitter, impedance and connector behavior. Supply decoupling and high-speed routing should be designed to preserve edge quality, while input thresholds and permitted data patterns must be confirmed from the manufacturer datasheet.
Recommandé
Synchronous Serial Data Links
The SY87701LZI fits synchronous serial links where data arrives as NRZ but the receiver must derive usable timing. Its verified 32Mbps-to-1.25Gbps range covers low-rate proprietary links through high-rate telecom-class traffic, subject to the interface's encoding and reference requirements. The device generates a recovered clock and retimed data, helping downstream circuits operate from a locally defined timing reference. For a new design, verify that the system's data rate, reference-clock arrangement, logic thresholds and jitter budget fall within the full Micrel specifications. Controlled-impedance routing, adequate return vias and separation from switching nodes are essential at the upper end of the operating range.
Recommandé
Données de référence d'ingénierie pour SY87701LZI — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Package | 28-pin SOIC (0.295 inch, 7.50 mm width) |
| Brand | Microchip Technology |
| Product Type | AnyRate clock and data recovery IC |
| Supply Voltage | 3.3 V |
| Minimum Data Rate | 32 Mbps |
| Maximum Data Rate | 1250 Mbps |
| Maximum Recovered Clock Rate | 1250 MHz |
| Data Format | NRZ |
| Verified Unit Price | $31.7908 as of 2026-10-30 |
Principaux différenciateurs
- Wide AnyRate operating range (vs No verified drop-in alternative was available for quantitative comparison)
- Recovered-clock performance capability (vs No verified drop-in alternative was available for quantitative comparison)
- Telecom standards positioning (vs No verified drop-in alternative was available for quantitative comparison)
Notes de conception
Treat the SY87701LZI as a high-speed timing-recovery device rather than a general-purpose logic IC. Route the incoming NRZ data and recovered-clock outputs as short, impedance-controlled traces with continuous reference planes and no unnecessary stubs. The verified records do not provide input impedance or edge-rate guidance, so the final trace geometry and termination arrangement must be based on the manufacturer datasheet and measured channel behavior.
Provide a clean 3.3V supply and place the required bypass capacitors close to the device's power and ground pins. The verified data confirms the 3.3V operating supply but does not specify allowable ripple, supply-current limits or decoupling values. Confirm those requirements in the current Micrel datasheet, and keep the switching-regulator and CDR supply paths separate enough to prevent recovered-clock jitter amplification.
Validate recovered-clock jitter, data-to-clock skew and receiver lock behavior at the highest intended rate of 1.25Gbps. The verified search summary provides the operating-rate ceiling but not detailed jitter or acquisition-time limits. Use realistic channel models and test equipment to evaluate reflections, connector transitions and simultaneous switching noise rather than assuming compliance claims guarantee adequate margin on a specific PCB.
Informations de conformité
The supplied records confirm industrial-temperature operation and Bellcore, ITU/CCITT and ANSI application references, but they do not provide formal RoHS, REACH, AEC-Q100, lead-free, halogen-free or conflict-minerals declarations. Each status is therefore marked unknown rather than inferred.
