Clock/Timing

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.

1,328 Records
Image Part Manufacturer Description Stock Action
MC74HC4046ADG onsemi
IC PHASE LOCKED L...
6,710
In-stock
Inquiry
MC74HC4046ADT onsemi
IC PHASE LOCKED L...
1,620
In-stock
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MC74HC4046AF onsemi
IC PHASE LOCKED L...
7,980
In-stock
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MC74HC4046AFG onsemi
IC PHASE LOCKED L...
6,050
In-stock
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MCH12140DR2 onsemi
IC DETECTOR PHAS...
5,320
In-stock
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MCH12140DR2G onsemi
IC DETECTOR PHAS...
7,460
In-stock
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MCK12140DR2 onsemi
IC DETECTOR PHAS...
6,360
In-stock
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NB2304AC1D onsemi
IC BUFFER CLOCK Q...
1,400
In-stock
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NB2304AC1DG onsemi
IC BUFFER CLOCK Q...
7,950
In-stock
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NB2304AC1DR2G onsemi
IC BUFFER CLOCK Q...
6,550
In-stock
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NB2304AC1HD onsemi
IC BUFFER CLOCK Q...
7,890
In-stock
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NB2304AC1HDG onsemi
IC BUFFER CLOCK Q...
4,830
In-stock
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NB2304AC2D onsemi
IC BUFFER CLOCK Q...
6,490
In-stock
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NB2304AC2DG onsemi
IC BUFFER CLOCK Q...
2,930
In-stock
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NB2304AC2DR2G onsemi
IC BUFFER CLOCK Q...
1,210
In-stock
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NB2304AI1D onsemi
IC BUFFER CLOCK Q...
3,270
In-stock
Inquiry
NB2304AI1DG onsemi
IC BUFFER CLOCK Q...
4,710
In-stock
Inquiry
NB2304AI1HD onsemi
IC BUFFER CLOCK Q...
5,730
In-stock
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NB2304AI1HDG onsemi
IC BUFFER CLOCK Q...
6,540
In-stock
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NB2304AI1HDR2G onsemi
IC BUFFER CLOCK Q...
7,510
In-stock
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