LTC6951IUHF-1

The LTC6951IUHF-1 is a high-performance clock generator/jitter cleaner from Linear Technology (now Analog Devices) in the LTC6951 family. It uses a phase-locked loop to synthesize precise, low-jitter output clocks from a reference input, suitable for synchronous digital systems (CPUs, FPGAs, SERDES, telecom subsystems).
Key features (typical):
- Programmable output frequency with high resolution
- Low additive and RMS jitter
- Fast startup and reliable lock
- Supports multiple output formats (single-ended or differential) with options for division/multiplication to reach desired rates
- Integrated PLL/VCO and clock distribution for tight inter-output skew
- Low power in a compact package
Packaging/version: -IUHF-1 denotes a specific revision/package variant. For exact electrical specs (input clock range, output formats, pinout) and package details, consult the LTC6951IUHF-1 datasheet on Analog Devices’ website.

Here are the typical features of LTC6951IUHF-1 (clock generator/PLL family; -IUHF denotes industrial temp, lead-free package):
- High-performance programmable clock generator with an integrated PLL
- Fractional-N and/or integer-N frequency synthesis from a reference
- Multiple differential output formats: LVPECL, LVDS, CML, and HCSL
- Wide output frequency range (multi-GHz region) with fast lock
- Ultra-low jitter/phase noise suitable for SERDES, PCIe, high-speed links
- Optional spread-spectrum clocking
- Single-supply operation and robust to standard telecom/industrial rails
- Power-down/enable features and flexible sequencing
- Small, lead-free package (IUHF variant) with industrial temperature range
Note: Exact figures (frequency range, jitter numbers, supply rails, pinout) vary by variant. Please refer to the LTC6951IUHF-1 datasheet for precise specifications.

- Pin count: 16 pins (IUHF package)
- Function: High-performance jitter-cleaning clock generator and fanout buffer (PLL) that takes a reference clock and provides clean, programmable-output clock(s) for high-speed serial interfaces.

Manufacturer: Analog Devices, Inc. (ADI). It acquired Linear Technology (LTC) in 2017 and now offers a broad portfolio of analog, mixed-signal, and DSP integrated circuits.
What kind of company: A multinational semiconductor company specializing in analog, mixed-signal, and signal-processing ICs used across industrial, consumer, automotive, and communications markets.

Applications of LTC6951IUHF-1 (high‑performance, low‑jitter clock source):
- High-speed clock generation and distribution in FPGA/ASIC designs
- Reference clocks for JESD204B/C and other SerDes links (PCIe, USB, Ethernet)
- Low-jitter sample clocks for ADCs/DACs in communications, radar, and instrumentation
- Clock distribution networks for multi-board synchronization
- RF/microwave test equipment timing references
- Aerospace/defense timing systems and general timing backbones for wireless/transceiver applications

LTC6951IUHF-1 comes in a 32‑pin LQFP (Lead Quad Flat Pack) with an exposed pad.