The Silicon Laboratories SI53301-B-GMR is a high-performance 1:6 universal clock buffer and level translator designed for precision clock distribution systems. Operating across a wide frequency range of 1 MHz to 725 MHz, this device features ultra-low additive jitter performance of 50 fs RMS, ensuring signal integrity in demanding applications. The integrated 2:1 input multiplexer enables seamless redundancy switching between clock sources with glitchless operation during input transitions.

Key Technical Specifications

Universal Input Formats: Supports LVPECL, LVDS, CML, HCSL, and LVCMOS signal standards
Output Configuration: Six universal outputs configurable as 6 differential or 12 single-ended clocks
Programmable Division: Per-bank output dividers with /1, /2, and /4 ratios
Control Features: Synchronous output enable with per-bank control and loss-of-signal (LOS) monitoring
Power Management: Integrated LDOs deliver high PSRR (>60dB) for noise immunity
Environmental Compliance: RoHS compliant, -40°C to +85°C industrial temperature range

Critical Performance Features

The device incorporates dual-bank architecture with synchronous output enable functionality, allowing phase-aligned clock enabling/disabling across outputs. Built-in glitch suppression circuitry ensures clean switching between redundant clock sources during failover scenarios. The universal input stage automatically detects and translates any supported input format to all output banks without external components. Power supply noise rejection is enhanced through on-chip voltage regulators that eliminate the need for complex external filtering.

Target Applications

This buffer is engineered for high-reliability clock distribution in communications infrastructure, including 5G base stations, optical transport networks, and data center equipment. Its combination of jitter performance and format flexibility makes it suitable for FPGA clock trees, multi-point LVDS distribution, and redundant timing card designs. The device seamlessly integrates with Silicon Laboratories' Si534x jitter attenuators and Si5xx oscillators to form complete timing solutions.

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