SY69952ZC - 155.52Mbps Clock Recovery IC | Microchip
MPN: SY69952ZC ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SY69952ZC Overview
A clock-recovering transceiver is a clock-and-timing semiconductor that accepts high-speed serial data, recovers timing from the incoming signal, and supports transmission and reception within optical or network transport systems. In the broader hierarchy, it belongs to clock and timing ICs, interface ICs, and semiconductor signal-path components. Its primary value is integrating functions that otherwise require separate transmitter, receiver, and clock-recovery circuitry.
The verified features include complete ATM-compatible single-chip transmitter and receiver integration, operation at 155.52 Mbps, one recovered-clock output, and compatibility with named ATM processor platforms. The available documentation also indicates seamless operation with PM5345, VNS67200, WAC-013-B/WAC-413-A, and NEC µPD98402 UNI processors. Electrical ratings, supply voltage, recovery thresholds, jitter performance, operating temperature, and package dimensions were not supplied in the retrieved data and therefore must be confirmed from the original manufacturer datasheet.
SY69952ZC is suited to ATM and SONET/SDH equipment, OC-3/STS-3 line-interface assemblies, optical transport modules, network processor interfaces, and legacy synchronous multiplexing systems. Its 28-SOIC construction favors conventional surface-mount assembly, but high-speed signal integrity still depends on controlled impedance routing, solid return paths, and careful power-supply decoupling. The device should be evaluated against the original datasheet and processor-interface requirements before use in a new design.
A key design consideration is that this is a legacy OC-3/STS-3 clock-recovery device rather than a general-purpose Ethernet PHY. Verify signal rates, logic levels, recovered-clock jitter, reference-clock requirements, and processor timing before replacing it with any modern interface. Lifecycle status and a documented drop-in replacement could not be established from the supplied results. This page consolidates the verified source links, procurement data availability, application context, and unresolved engineering information without inventing missing specifications.
Drop-in alternatives for SY69952ZC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SY69952ZC (same form factor and footprint) — differing in Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesSY69952ZC Specifications
| Product Type | OC-3/STS-3 clock-recovering transceiver |
| Data Rate | 155.52 Mbps |
| Clock Output Count | 1 output |
| Supported Lower Rate | 51.84 Mbit/s |
| Architecture | ATM-compatible single-chip transmitter and receiver |
| Application | Ethernet, SONET/SDH, and ATM applications |
| Package | 28-SOIC |
| Pin Count | 28 pins |
| Mounting Type | Surface mount |
| Processor Compatibility | PM5345, VNS67200, WAC-013-B/WAC-413-A, and NEC µPD98402 UNI processors |
SY69952ZC 28-soic Pin Configuration Guide
Pin configuration for SY69952ZC (28-soic package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SY69952ZC.
Refer to the datasheet for full pin configuration.
Typical Applications
SY69952ZC is suitable for 8 applications: OC-3/STS-3 Line Interfaces, ATM Network Processor Interfaces, SONET/SDH Transport Equipment, Legacy ATM Access Concentrators, Optical Transport Module Controllers, Network Processor Timing Cards, Test and Measurement Interfaces, Legacy Equipment Spare Parts.
OC-3/STS-3 Line Interfaces
The SY69952ZC fits a legacy 155.52 Mbps OC-3/STS-3 line-interface design because it combines clock recovery with transmitter and receiver functions in one 28-SOIC device. It can reduce the number of separate timing blocks around an ATM-compatible network processor. Engineering verification must confirm supply voltage, logic levels, recovery limits, jitter, and termination values from the manufacturer datasheet before layout release. Controlled-impedance routing and a continuous ground plane are particularly important at this data rate, while bypass components should be placed close to the device supply pins.
Recommended
ATM Network Processor Interfaces
The SY69952ZC is intended for ATM-oriented processor interfaces supporting 155.52 Mbps clock and data recovery. Verified family information names PM5345, VNS67200, WAC-013-B/WAC-413-A, and NEC µPD98402 UNI processors as compatible platforms. When designing around one of these devices, verify clock source selection, serial-data timing, pin levels, reset behavior, and board-level termination against both datasheets. The integrated transmitter and receiver can simplify legacy line-card architecture, but complete electrical specifications must come from the original manufacturer documentation.
Recommended
SONET/SDH Transport Equipment
The SY69952ZC can support a legacy OC-3/STS-3 section of SONET/SDH transport equipment because its verified description identifies 155.52 Mbps clock and data recovery for this application class. It is most appropriate for equipment that already matches the device's OC-3 framing and processor interface rather than for unrestricted new transport architectures. Designers should confirm receive sensitivity, clock jitter, reference requirements, and loss-of-signal behavior from the datasheet. High-speed traces require controlled impedance and minimized stub lengths.
Recommended
Legacy ATM Access Concentrators
For a legacy ATM access-concentrator design, the SY69952ZC offers an integrated OC-3/STS-3 transmitter, receiver, and clock-recovery path at 155.52 Mbps. This consolidation can reduce board partitioning compared with a design built from discrete clock-recovery and interface blocks. The decisive checks are processor timing compatibility, I/O voltage compatibility, clock architecture, and thermal performance at the system level. Prototype and compliance testing should be completed against the exact OC-3 requirements of the target network before production release.
Recommended
Optical Transport Module Controllers
The SY69952ZC is relevant to legacy optical transport modules that terminate 155.52 Mbps OC-3/STS-3 streams and need deterministic clock recovery. Its integrated single-chip architecture can serve the interface between serialized line data and an ATM-compatible processor. Optical-module designs must additionally coordinate transmitter and optical-device timing, monitor loss-of-signal behavior, and ensure that recovered-clock jitter meets the optical interface budget. The retrieved data does not state those electrical limits, so engineers must obtain the manufacturer datasheet rather than infer them.
Recommended
Network Processor Timing Cards
The SY69952ZC can be evaluated for a legacy network-processor timing card requiring 155.52 Mbps clock and data recovery with one recovered-clock output. Its documented compatibility with several ATM processor platforms makes it more relevant than a generic serializer for boards built around those processors. Design review should compare edge timing, input threshold, output jitter, reference-clock needs, and supply sequencing across both component datasheets. Maintain controlled trace geometry and avoid routing high-speed signals across plane splits.
Recommended
Test and Measurement Interfaces
A legacy telecom test set or line-interface fixture may use the SY69952ZC to exercise OC-3/STS-3 clock-and-data-recovery behavior at 155.52 Mbps. Its integrated transmitter and receiver can create a compact source-and-receive path for processor-interface testing. Instrument designers must account for the unreported supply voltage, jitter, recovery thresholds, and temperature limits. Probe access should preserve signal integrity, use controlled references, and avoid adding long test-point stubs to high-speed nets. Production use also requires confirmed component sourcing.
Recommended
Legacy Equipment Spare Parts
The SY69952ZC is most defensible as a maintenance or spare part for equipment whose original bill of materials specifies this exact MPN. Reproduction of an installed clock-recovery path reduces the risk associated with an undocumented substitute, particularly when processor timing and board layout are already fixed. Before purchasing, compare the replacement's marking, package, pinout, date code requirements, and operating-temperature grade with the failed component. Distributor stock and condition should be confirmed as of the quotation date.
Recommended
Recommended Products Summary
Engineering reference data for SY69952ZC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Brand | Microchip Technology |
| Package | 28-SOIC |
| Data Rate | 155.52 Mbps |
| Clock Output Count | 1 output |
| Architecture | ATM-compatible single-chip transmitter and receiver |
| Primary Application | Ethernet, SONET/SDH, and ATM applications |
| Documented Compatibility | PM5345, VNS67200, WAC-013-B/WAC-413-A, and NEC µPD98402 UNI processors |
| Ordering Variants | SY69952ZC; SY69952ZC-TR tape-and-reel ordering page identified |
Key Differentiators
- Integrated OC-3/STS-3 clock-and-data-recovery function (vs Discrete transmitter, receiver, and clock-recovery implementation)
- Documented processor-platform interoperability (vs Unspecified generic clock-recovery IC)
- Single recovered-clock output at the legacy transport rate (vs Multi-output modern timing architecture)
Design Notes
At 155.52 Mbps, route serial data and recovered-clock signals over controlled-impedance traces with a continuous reference plane and no unnecessary stubs. Keep the clock away from noisy switching nodes and use only verified terminations from the manufacturer interface circuit. The retrieved snippets do not provide rise time, jitter, threshold, or impedance values, so layout dimensions and termination must be calculated from the original datasheet rather than guessed.
Place supply bypass capacitors close to the relevant device pins and provide a low-impedance return path before tuning logic or clock behavior. Because the SY69952ZC supply voltage and current limits are absent from the verified snippets, do not select a regulator or capacitor rating from inference. Review the manufacturer power-recommendation section for voltage tolerance, sequencing, startup current, and decoupling requirements.
Do not treat SY69952ZC-TR as a different replacement chip; the available evidence identifies it as the tape-and-reel ordering form. Likewise, generic cross-reference search tools do not prove electrical, pin, timing, or lifecycle compatibility. For maintenance work, match the exact installed MPN, package, pinout, processor interface, and documented operating conditions before approving a substitute.
Preserve the reference-design topology around the clock and data paths, especially any resistor networks, termination components, coupling capacitors, or loopback structures shown in the manufacturer documentation. Those values cannot be reconstructed from the retrieved search snippets. During PCB bring-up, monitor power rails, recovered-clock stability, and data errors before marginalizing components or changing trace geometry.
Compliance Information
The supplied results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim should be inferred from the distributor listing.
