LTC6953IUKG#PBF

LTC6953IUKG#PBF is the full ordering code for Linear Technology (now Analog Devices)’s LTC6953 clock-distribution IC. The device is a high-performance, low-jitter clock generator/fanout buffer: you supply a single reference clock and it distributes multiple low-jitter clock outputs to digital devices such as FPGAs, processors, SERDES interfaces, and data converters. It’s designed for tight timing control, good power-supply rejection, and often supports synchronization/spread-spectrum options depending on the exact variant.
The suffixes indicate packaging/conditioning:
- IUKG denotes the industrial-temperature variant and its package code.
- PBF indicates RoHS-compliant, lead-free packaging.
For exact input/output counts, voltage levels, supported reference frequencies, jitter specs, and configuration options, consult the LTC6953 datasheet and product page.

An exact cross-reference for LTC6953IUKG#PBF isn’t published; replacements depend on the target specs (outputs, jitter, input reference, supply). Likely candidates to evaluate: Analog Devices AD952x family (AD9523/AD9528/AD9520), Silicon Labs Si533x/Si534x families, TI clock-distribution parts (CDCLVC/CDCDLVx line). Always verify 3.3V supply, number of outputs, jitter, phase alignment, and packaging. Use Digi-Key/Mouser cross-reference tools to confirm.

Here are the key features typically advertised for the LTC6953IUKG#PBF clock device (a programmable jitter-attenuating clock generator):
- Programmable clock synthesis with low jitter via an internal PLL
- Programmable via SPI/I2C interface (frequency, dividers, output type)
- One or more clock outputs with selectable output formats (CMOS/LVDS/CML) and configurable drive strength
- Spread-spectrum clocking to reduce EMI
- Output enable/power-down for power management
- Reference input options with robust lock detection and monitoring
- Low power operation on a single supply; suitable for industrial ranges
- Wide operating temperature range
- Protection features such as power-on reset and fault reporting
- Pb-free packaging (PBF) in the IUKG package variant
Note: for exact electrical specs, supply ranges, output formats, and pinout, please consult the LTC6953IUKG#PBF datasheet.

- Pin count: 16 pins (16-pin package)
- Function: A high‑performance PLL-based clock generator with two outputs (dual-output clock multiplier/jitter‑cleaner). It generates low‑jitter clock signals from a reference, with programmable division/multiplication for clock synthesis used in high-speed digital systems.

Analog Devices, Inc. (ADI). It is a multinational American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits. ADI acquired Linear Technology (the LTC line) in 2017, so LTC part numbers (like LTC6953IUKG#PBF) are now part of ADI’s portfolio.

Application areas: The LTC6953IUKG#PBF is a low-noise, multi-output clock generator/distributor used to generate and route high-quality reference clocks in timing-critical systems.
- Clock generation and distribution for FPGAs, ASICs, and SERDES
- Reference clocks for high-speed interfaces (PCIe, USB 3.x, SATA, Ethernet)
- Low-jitter clock sources for ADC/DAC and other data converters
- Test and measurement equipment requiring precise timing
- Telecom/data‑com and wireless infrastructure clock networks
- RF/microwave and radar systems needing stable timing and jitter control

Package: 16-lead TSSOP (KG code), industrial temperature range (-40°C to 85°C), Pb-free version (PBF).