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Clock/Timing

Clock Timing covers the parts that keep a system synchronized: crystal oscillators, clock generators, jitter cleaners, PLLs, buffers, dividers, and real-time clocks. Some designs only need a simple 25 MHz oscillator to drive an MCU, while others depend on a low-jitter clock tree for Ethernet, SerDes, RF, or data converter timing. These parts show up everywhere, from industrial controllers and network switches to medical devices, telecom line cards, and automotive modules. When buyers source clock timing components, the first thing they usually check is frequency stability and jitter, because a cheaper part with worse phase noise can force a redesign later. Package matters too. A lot of engineers still prefer standard SMD packages like 3225 or 5032 for oscillators, but smaller designs keep pushing toward tighter footprints and lower current draw. Supply is the other big issue. Active clock ICs from major brands can go on allocation without much warning, and older RTC or buffer part numbers sometimes drift into last-time-buy status while production is still running. That is where the trade-off usually shows up: pay more for a branded, traceable part now, or gamble on a gray-market offer and risk inconsistent date codes, poor storage, or outright counterfeit stock. For procurement teams, packaging preference is not a small detail either. Tape-and-reel is fine for production, but many repair and NPI builds still need cut tape or small quantities with proper labels and handling. If you are comparing clock timing parts, it helps to send the exact part number, required quantity, target date code, and whether alternates are acceptable. For current stock, lead time, or a quote, check availability at icxing.com.

Frequently Asked Questions

How do I know if a clock timing part is genuine when buying from the open market?

Ask for photos of the label, reel, and lot or date code before placing the order. For timing ICs and oscillators, inconsistent markings and mixed date codes are common warning signs, especially on older or allocated part numbers. Buying through a distributor that can provide traceability lowers that risk.

What specs matter most when comparing oscillators and clock generators?

Start with frequency, stability over temperature, supply voltage, output type, and jitter. For simple MCU clocks, basic stability may be enough, but Ethernet, FPGA, and RF designs often need much tighter phase noise performance. The right part depends on the system budget, not just the headline frequency.

Why do clock timing lead times vary so much between similar part numbers?

Small differences in package, temperature range, frequency option, or output format can turn a common part into a factory-order item. Standard frequencies and popular SMD packages usually move faster, while custom or legacy options may carry long lead times. If your build is urgent, ask about approved alternates early.

Image Part Manufacturer Description Stock Action
844008AKI-46LF Intersil (Renesas Electronics Corporation)
IC CLK GEN 8LVDS 3...
3,700
In-stock
Inquiry
844008AKI-46LFT Intersil (Renesas Electronics Corporation)
IC CLK GEN 8LVDS 3...
5,480
In-stock
Inquiry
844008AY-16LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN 8LVD...
1,270
In-stock
Inquiry
844008AY-16LFT Intersil (Renesas Electronics Corporation)
IC CLOCK GEN 8LVD...
2,930
In-stock
Inquiry
844008BYI-15LF Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 8L...
2,860
In-stock
Inquiry
844008BYI-15LFT Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 8L...
4,490
In-stock
Inquiry
844021BG-01LFT Intersil (Renesas Electronics Corporation)
IC CLOCK GEN ETHE...
5,900
In-stock
Inquiry
844021BGI-01LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN ETHE...
1,010
In-stock
Inquiry
844021BGI-01LFT Intersil (Renesas Electronics Corporation)
IC CLOCK GEN ETHE...
7,350
In-stock
Inquiry
8440258AK-46LF Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 8O...
4,740
In-stock
Inquiry
8440258AK-46LFT Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 8O...
7,650
In-stock
Inquiry
8440258AKI-46LF Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 8O...
2,040
In-stock
Inquiry
8440258AKI-46LFT Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 8O...
7,240
In-stock
Inquiry
8440259AK-05LF Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 9O...
1,080
In-stock
Inquiry
8440259AK-05LFT Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 9O...
3,690
In-stock
Inquiry
8440259AK-45LF Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 9O...
7,210
In-stock
Inquiry
8440259AK-45LFT Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER 9O...
2,980
In-stock
Inquiry
ICS844051CGILFT Intersil (Renesas Electronics Corporation)
IC CLOCK GEN GIG ...
6,300
In-stock
Inquiry
844071AGLFT Intersil (Renesas Electronics Corporation)
IC CLOCK GEN GIG ...
7,540
In-stock
Inquiry
844204AK-245LF Intersil (Renesas Electronics Corporation)
IC CLK SYNTHESIZ...
3,820
In-stock
Inquiry