SiTime Network Synchronizers

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Precision Network Synchronization for IEEE 1588/PTP

SiTime’s network synchronizers support nanosecond-level synchronization in distributed systems, enabling accurate timing across communications infrastructure - even under harsh environments and variable conditions.

TimeSync™ Platform
Key Capabilities
Featured Products
Applications
Why SiTime TimeSync™?

TimeSync™ Platform - Precision Network Synchronization

Nanosecond Accuracy, MEMS Reliability, Network-Wide Timing Confidence

As next-gen networks demand tighter timing across distributed architectures, the TimeSync™ Platform from SiTime delivers industry-leading precision and robustness for IEEE 1588 Precision Time Protocol (PTP), Synchronous Ethernet (SyncE), and Global Navigation Satellite System (GNSS) holdover. Unlike traditional quartz-based synchronizers, TimeSync™ integrates MEMS oscillators, DPLLs, and hitless switching logic in a compact, programmable device - resulting in superior resilience, smaller footprint, and longer holdover performance, even in harsh or mobile environments.

Key Capabilities

Integrated DPLL + MEMS Oscillator: Combines digital phase-locked loop with rugged MEMS timing for sub-microsecond alignment under variable network conditions

Hitless Reference Switching: Maintains continuous, undisturbed operation during timing source transitions or failures

Precision Holdover: Maintains network sync with nanosecond-level accuracy even during GNSS loss, ideal for edge and indoor deployments

Multi-Protocol Support: Supports full Synchronous Ethernet and IEEE 1588 PTP timing stacks for a variety of telecom and datacom standards

Compact Footprint: Designed for space-constrained systems including small cells, fronthaul gateways, microwave backhaul, and C-RAN infrastructure

Featured Products

Based on SiTime Cascade II + Synchronizer devices

SiT95147 / SiT95148

10-output network synchronizer with programmable DPLL
Supports redundant inputs and reference monitoring
Compatible with high-speed SerDes (up to 112 Gbps)
Ideal for timing-sensitive FPGAs and SoCs in 5G basebands

SiT95145

Focused jitter cleaner with holdover capability, suitable for SyncE deployments and PTP gateways

Note: These devices are often paired with Cascade™-class clock generators for complete clock tree implementations across edge routers, radio units, and backhaul systems.

Applications

Centralized 5G Units (CU/DU split architecture)
Small Cells and Macro Base Stations
Fronthaul and Midhaul Gateways
Microwave Backhaul and O-RAN Systems
Synchronized Data Centers and Edge Cloud Deployments
Automotive V2X and GNSS-denied environments

Why SiTime TimeSync™?

Feature	Traditional Quartz Solutions	SiTime TimeSync™
Holdover Stability	Minutes	Hours+
Vibration / Shock Resistance	Low	100,000 g
Size and Integration	Discrete, bulky	Compact, integrated
Hitless Switching	External logic required	Built-in
Supply Chain Resilience	Fragile, geographically-limited	Fabless MEMS-based