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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
ICS844011AGILF Intersil (Renesas Electronics Corporation)
IC CLK GEN FIBRE ...
5,180
In-stock
Inquiry
844021BG-01LF Intersil (Renesas Electronics Corporation)
IC CLK GEN ETH LV...
5,490
In-stock
Inquiry
ICS844051CGILF Intersil (Renesas Electronics Corporation)
IC CLK GEN GIG ET...
3,920
In-stock
Inquiry
844071AGLF Intersil (Renesas Electronics Corporation)
IC CLK GEN SAS LV...
2,130
In-stock
Inquiry
ICS8442AYLF Intersil (Renesas Electronics Corporation)
IC SYNTHESIZER D...
4,900
In-stock
Inquiry
86004BG-01LF Intersil (Renesas Electronics Corporation)
IC CLK BUFFER ZD ...
3,110
In-stock
Inquiry
8634BY-01LF Intersil (Renesas Electronics Corporation)
IC BUFFER ZD 1:5 LV...
6,850
In-stock
Inquiry
87004AGLF Intersil (Renesas Electronics Corporation)
IC CLK GENERATOR...
2,950
In-stock
Inquiry
87008AGILF Intersil (Renesas Electronics Corporation)
IC CLK GENERATOR...
7,190
In-stock
Inquiry
87016AYLF Intersil (Renesas Electronics Corporation)
IC CLK GENERATOR...
5,120
In-stock
Inquiry
8701CYLF Intersil (Renesas Electronics Corporation)
IC CLK GENERATOR...
3,020
In-stock
Inquiry
87021AMILF Intersil (Renesas Electronics Corporation)
IC CLK GENERATOR...
5,750
In-stock
Inquiry
8702BYLF Intersil (Renesas Electronics Corporation)
IC CLK GENERATOR...
4,690
In-stock
Inquiry
ICS873033AGLF Intersil (Renesas Electronics Corporation)
IC CLK GENERATOR...
5,210
In-stock
Inquiry
ICS873034AGLF Intersil (Renesas Electronics Corporation)
IC CLK GEN /2 /4 /8 D...
3,990
In-stock
Inquiry
ICS873039AM Intersil (Renesas Electronics Corporation)
IC CLK GEN /2 4 /4 6 2...
3,340
In-stock
Inquiry
ICS87321AMI Intersil (Renesas Electronics Corporation)
IC CLK GEN /1 /2 DIF...
3,710
In-stock
Inquiry
8732AY-01LF Intersil (Renesas Electronics Corporation)
IC CLK GEN LV 3.3V ...
7,540
In-stock
Inquiry
8735AM-21LF Intersil (Renesas Electronics Corporation)
IC CLK GEN ZD DIF...
4,580
In-stock
Inquiry
8735AY-31LF Intersil (Renesas Electronics Corporation)
IC CLK GEN ZD DIF...
6,290
In-stock
Inquiry