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.

Image Part Manufacturer Description Stock Action
QS5920AQ Renesas Electronics Corporation
QS5920 - CLOCK DRIV...
1,030
In-stock
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960023CGLF Renesas Electronics Corporation
IC TIMING CLOCK
7,000
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960019BFLF Renesas Electronics Corporation
IC TIMING CLOCK
1,760
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841S101EGILFT Renesas Electronics Corporation
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9FGL0441BKILF Renesas Electronics Corporation
PCI EXPRESS (PCIE...
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INTEL CK505, PCI EX...
5,130
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874003AGI-02LF Renesas Electronics Corporation
CLOCK AND TIMING...
7,490
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QS5813PV Renesas Electronics Corporation
QS5813 - CLOCK DRIV...
5,450
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8430S07AKILF Renesas Electronics Corporation
IC CLK GENERATOR...
1,490
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5V9910ZQ-QS5V9910-5SOI Renesas Electronics Corporation
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2,310
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QS5920ZQAPA Renesas Electronics Corporation
QS5920 - CLOCK DRIV...
1,400
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QS5818ZQPV Renesas Electronics Corporation
QS5818 - CLOCK DRIV...
7,450
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5V9910ZQ Renesas Electronics Corporation
3.3V LOW SKEW PLL C...
5,710
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830584AGILF Renesas Electronics Corporation
CLOCK FANOUT BUF...
3,020
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8343AYI-01LF Renesas Electronics Corporation
LOW SKEW CLOCK DR...
3,150
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85314BGI-09LF Renesas Electronics Corporation
CLOCK IC FANOUT B...
4,310
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85314AGI-11LF Renesas Electronics Corporation
CLOCK FANOUT BUF...
2,400
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83021AMILF Renesas Electronics Corporation
MIXED SIGNAL TRA...
4,860
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83940DYLF Renesas Electronics Corporation
CLOCK FANOUT BUF...
2,150
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85320AMILF Renesas Electronics Corporation
MIXED SIGNAL TRA...
4,730
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