SI5345A-D04313-GMR

The SI5345A-D04313-GMR is Silicon Labs’ programmable, jitter-attenuating clock generator from the Si5345 family. It takes a single reference clock (crystal or oscillator) and uses internal PLLs to produce multiple low-jitter output clocks. Key points:
- Flexible clock synthesis: generates user-defined output frequencies via fractional-N synthesis; supports synchronized or independent outputs.
- Output formats: configurable for common clock standards (for example, LVCMOS, LVDS, LVPECL) to match downstream devices.
- Control: I2C/SMBus programmable, with dynamic frequency changes and enabling/disabling of outputs as needed.
- Applications: ideal for CPU/FPGA/system clocks, SerDes timing, backplanes, and other multi-output clocking needs where jitter and skew must be minimized.
- Package/marking: SI5345A-D04313-GMR’s D04313-GMR suffix denotes date/lot and package variant; consult the datasheet for exact pinout and packaging details.
Note: For precise electrical specs (voltage ranges, jitter figures, and timing budgets), refer to the official datasheet and silicon-marking documentation.

Here are the key features of the SI5345A-D04313-GMR (Silicon Labs):
- Flexible, programmable clock generator with jitter attenuation for multiple outputs.
- Four independent outputs (configurable to LVDS/LVPECL/LHC/HCSL or LVCMOS styles).
- Fractional-N PLL with VCO for wide, precise frequency synthesis.
- One or more reference inputs (external clock/crystal) with robust jitter cleanup.
- I2C (SMBus) control interface for on-the-fly programming and monitoring.
- Spread-spectrum capability to reduce EMI.
- Output enable/disable and power-down for power management.
- Zero-delay buffer/phase alignment options to synchronize outputs.
- Small, RoHS-compliant package suitable for space-constrained designs.
- Supported by design tools (ClockBuilder™Pro) for easy frequency planning.
Note: Specific electrical parameters (range, jitter numbers, maximum frequencies) vary by configuration and are documented in the datasheet and the ClockBuilder tool.

QFN (leadless surface-mount) package.

- Pin count: 32 pins (QFN-32)
- Function: Jitter-attenuating, multi-output clock generator/distributor (clock multiplier) with programmable outputs via I2C.

- Manufacturer: Silicon Labs (Silicon Laboratories, Inc.)
- What kind of company: A fabless semiconductor company that designs and markets integrated circuits, including timing/clock solutions, MCUs, wireless and sensing ICs for embedded systems.

Typical application areas for the SI5345A-D04313-GMR are:
- Multi-output clock generation and distribution for FPGAs/SoCs
- High-speed serial interfaces: PCIe, SATA/SSD, USB, HDMI
- Networking/telecom equipment: switches, routers, line cards, base stations
- Data-center and enterprise systems requiring synchronized clocks
- Memory and peripheral interfaces (DDR, SRAM) clocking
- Test/measurement equipment and any system needing low-jitter, phase-aligned clocks from a single reference