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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.

1,328 Records
Image Part Manufacturer Description Stock Action
LC72137MA-AE onsemi
IC PLL FREQ SYSTH...
3,040
In-stock
Inquiry
LC72146MA-AH onsemi
IC PLL FREQ SYSTH...
5,990
In-stock
Inquiry
PCS3I8504AG-08CR onsemi
IC CLOCK PEAK EMI...
5,820
In-stock
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LC72121-D-E onsemi
IC PLL FREQ SYSTH...
3,120
In-stock
Inquiry
LC72121V-D-MPB-E onsemi
IC PLL FREQ SYSTH...
4,180
In-stock
Inquiry
LC72130-E onsemi
IC PLL FREQ SYSTH...
3,510
In-stock
Inquiry
NB3W800LMNTWG onsemi
IC CLOCK ZDB FANO...
1,460
In-stock
Inquiry
NLV74HC4046ADR2G onsemi
IC PHASE LOCKED L...
5,090
In-stock
Inquiry
NLVHC4046ADTR2G onsemi
IC PHASE LOCKED L...
6,080
In-stock
Inquiry
NB3H63143G00MNG onsemi
IC CLOCK GENERAT...
7,120
In-stock
Inquiry
LC72148V-TLM-E onsemi
IC PLL FREQ SYSTH...
2,070
In-stock
Inquiry
LC72151VS-MPB-E onsemi
IC PLL FREQ SYSTH...
3,980
In-stock
Inquiry
P3MS650103H-4CR onsemi
IC CLK GEN EMI RE...
5,950
In-stock
Inquiry
PCS3P7303AG-08CR onsemi
IC CLK EMI REDUCT...
7,710
In-stock
Inquiry
FS6128-07-XTD onsemi
IC CLOCK GEN PLL ...
5,660
In-stock
Inquiry
SC14046BDWG onsemi
IC PLL CLOCK DRIV...
1,920
In-stock
Inquiry
SC14046BDWR2G onsemi
IC PLL CLOCK DRIV...
3,450
In-stock
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NB3W1200LMNG onsemi
IC CLK ZDB/FANOUT...
1,950
In-stock
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P3PS850BHG-08CR onsemi
IC CLK GEN EMI MO...
1,660
In-stock
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MC100EP139MNG onsemi
BBG ECL DIVIDER 2...
4,710
In-stock
Inquiry