SI5341B-D-GMR

SI5341B-D-GMR is Silicon Labs’ high-performance, programmable jitter-attenuating clock generator (a zero-delay buffer) that converts a reference clock into multiple low-jitter output clocks with tight phase relationships.
Key points
- Function: I2C-programmable multi-output clock generator/driver from a single reference; suitable for distributing clocks to FPGAs, memory interfaces, SERDES, and networking.
- Features: fractional-N PLLs, spread-spectrum clocking, selectable output formats and drive strengths, and low output skew between channels.
- Packaging/ordering: The B-D-GMR suffix denotes a specific ordering option (revision/specified packaging). Check the datasheet for exact package, temperature rating, and RoHS/tape-and-reel details.
- Use: Typically configured with Silicon Labs’ ClockBuilder Pro tool to generate the required register settings; programming via I2C.
- Source of truth: For exact electrical specs, recommended operating ranges, and layout guidelines, refer to the SI5341B datasheet and product page on siliconlabs.com.

Closest direct cross-references to SI5341B-D-GMR are IDT ICS5341/ICS5342/ICS5343 clock generator/jitter-cleaner parts. Other vendors offer similar devices (e.g., TI CDCE913/CDCLVCx series), but exact substitutes depend on outputs, jitter, voltage, temp range, and package. Use Silicon Labs’ cross-reference tool or distributor databases for exact equivalents.

SI5341B-D-GMR features (concise):
- I2C/SMBus programmable, four-output clock generator/buffer from a single reference
- Per-channel output formats: LVCMOS/TTL, LVDS, LVPECL, HCSL/CML; programmable drive strength and skew
- Flexible reference options and fractional-N PLL for versatile output frequencies
- Zero-delay, phase-aligned multi-output operation; supports synchronization and alignment of outputs
- Spread Spectrum Clocking (SSC) to reduce EMI
- Per-output enable/disable, fault/status reporting, and dynamic reconfiguration
- Optional power management and low‑power modes
- Robust register map with global and per-output controls
- Industrial temperature range; RoHS-compliant packaging (GMR)
Note: exact capabilities (formats, ranges, and performance) depend on device revision; refer to the SI5341B datasheet for precise specifications.

- Pin count: 16 pins (QFN package, GMR variant)
- Function: Si5341B-D-GMR is an Any-Rate Clock Multiplier/Generator (clock synthesizer with jitter cleaner). It takes a reference clock and generates multiple low-jitter output clocks; programmable via an I2C-like interface.

- Manufacturer: Silicon Labs (Silicon Laboratories, Inc.)
- Company type: Fabless semiconductor company that designs and markets mixed-signal integrated circuits, including timing devices (clock generators), microcontrollers, wireless ICs, and sensors for IoT, automotive, and industrial applications.

SI5341B-D-GMR is a jitter‑attenuating clock generator/distributor. Typical applications include:
- Clock generation/distribution for SoCs, FPGAs, and ASICs
- Jitter-clean reference clocks for SERDES (PCIe, SATA, USB, Ethernet)
- Memory interface clocks (DDR/LPDDR, SRAM) with tight timing budgets
- Video/graphics clocks and interfaces (HDMI, DisplayPort)
- Telecom/wireless base stations and PHY timing
- Industrial/medical instrumentation needing multiple low-jitter clocks
- Test/measurement equipment requiring multiple synchronized clocks from a single reference

QFN-16 package (4.0 x 4.0 mm), RoHS-compliant.