SI5342B-D-GM

SI5342B-D-GM is Silicon Labs’ high-performance, programmable clock generator and zero-delay buffer (SI534x family). It derives low-jitter output clocks from one or more references using fractional-N PLLs, with outputs configurable in various formats (LVCMOS, LVDS, CML, etc.). Features include jitter cleaning, spread-spectrum support, and a flexible I2C control interface, enabling synchronized, multi-output operation with deterministic phase relationships. It’s commonly used to generate clocks for FPGAs/ASICs, SERDES, memory interfaces, and telecom/networking PHYs, or as a clock distribution backbone in complex systems. Architecture typically comprises dual/spiral PLLs, output dividers, a reference path, and a jitter-cleaning path, all designed for low power and compact packaging. Configuration is done via I2C (or Silicon Labs ClockBuilder Pro). The suffix -GM indicates a specific package/temperature variant; see the datasheet for exact package type, RoHS/lead-free status, and temperature range (industrial vs. commercial).

Do you mean direct, pin-for-pin drop-in replacements (same package/ordering codes) or functionally equivalent parts from other manufacturers?

SI5342B-D-GM is Silicon Labs’ flexible Any-Output clock generator. Key features:
- Single reference input: accepts crystal or oscillator, with flexible power/phase management.
- Multi-output generation: programmable frequencies per output derived from one reference; uses fractional-N synthesis to cover a wide frequency range.
- Output formats and drive: configurable LVDS, LVPECL, HCSL, CMOS, or CML outputs; adjustable per-output drive strength and skew control.
- Jitter and cleanliness: integrated jitter cleaner with low additive jitter; holdover capability when the reference is lost.
- EMI options: optional spread-spectrum modulation to reduce EMI.
- Synchronization: per-output phase alignment, programmable delays, and rapid restart/shutdown.
- Control interface: I2C/SMBus interface with programmable registers; multiple device addressing; reset control.
- Reliability: suitable for wide operating temperatures with low power; RoHS-compliant package (GM).
Note: For exact output counts, voltage rails, and timing specs, refer to the latest SI5342B datasheet.

- Pin count: 28 pins (QFN package variant SI5342B-D-GM).
- Function: Dual-output, programmable jitter-cleaning clock generator (zero-delay buffer). It takes a reference input and provides two clean, phase-aligned outputs (I²C-programmable frequencies) for clock distribution.

Manufacturer: Silicon Labs (Silicon Laboratories, Inc.).
What kind of company: Silicon Labs is a fabless semiconductor company that designs and sells mixed-signal integrated circuits and software—specializing in timing products (clock generators, jitter attenuators like the Si5342B), wireless SoCs, microcontrollers, sensors and IoT solutions. It is a publicly traded, Austin‑based semiconductor and silicon‑IP company.

SI5342B-D-GM is a multi-output, jitter-attenuating clock generator/driver. Typical application areas include:
- FPGA/ASIC/SoC clocking: multiple synchronized reference clocks for SERDES, memory interfaces
- Networking/telecom equipment: Ethernet, PCIe, SATA, USB reference clocks with jitter-clean distribution
- RF/IF systems: ADC/DAC sampling clocks and local oscillator generation
- Test and measurement equipment: precise, configurable clock sources
- Video/imaging/storage interfaces: clocks for HDMI, MIPI, GPU/CPU memory interfaces
- Industrial/automotive: robust, low-jitter clocks across wide temperature ranges

I can’t look up external datasheets from here. Please consult the Silicon Labs Si5342B-D-GM datasheet or product page for the exact package type and mechanical drawing.