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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
181M-01LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN LOW ...
6,360
In-stock
Inquiry
181M-02LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN LOW ...
4,750
In-stock
Inquiry
ICS181M-03LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN LOW ...
3,640
In-stock
Inquiry
181M-51LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN LOW ...
2,970
In-stock
Inquiry
181M-52LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN LOW ...
2,940
In-stock
Inquiry
181M-53LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN LOW ...
4,770
In-stock
Inquiry
181MI-02LF Intersil (Renesas Electronics Corporation)
IC CLOCK GEN LOW ...
7,050
In-stock
Inquiry
2402MLF Intersil (Renesas Electronics Corporation)
IC BUFFER ZDB MUL...
5,960
In-stock
Inquiry
307G-03LF Intersil (Renesas Electronics Corporation)
IC CLK SOURCE SRL...
7,660
In-stock
Inquiry
307GI-03LF Intersil (Renesas Electronics Corporation)
IC CLK SOURCE SRL...
5,410
In-stock
Inquiry
ICS3726M-02LF Intersil (Renesas Electronics Corporation)
IC VCXO 24-36MHZ 12M...
3,090
In-stock
Inquiry
512MILF Intersil (Renesas Electronics Corporation)
IC CLK MULTIPLIE...
5,200
In-stock
Inquiry
512MLF Intersil (Renesas Electronics Corporation)
IC CLK MULTIPLIE...
1,750
In-stock
Inquiry
525-01RLF Intersil (Renesas Electronics Corporation)
IC CLK USER CONFI...
6,160
In-stock
Inquiry
525R-02ILF Intersil (Renesas Electronics Corporation)
IC CLK USER CONFI...
3,530
In-stock
Inquiry
527R-02LF Intersil (Renesas Electronics Corporation)
IC CLK SLICER ZDB...
5,200
In-stock
Inquiry
571MLF Intersil (Renesas Electronics Corporation)
IC ZDB LOW PHASE ...
7,400
In-stock
Inquiry
581G-01ILF Intersil (Renesas Electronics Corporation)
IC CLK MUX ZD GLI...
6,420
In-stock
Inquiry
601G-01LF Intersil (Renesas Electronics Corporation)
IC CLK MULTIPLIE...
1,890
In-stock
Inquiry
601M-01LF Intersil (Renesas Electronics Corporation)
IC CLK MULT LOW P...
3,200
In-stock
Inquiry