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.
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.
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.
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 | |
|---|---|---|---|---|---|---|
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National Semiconductor | PHASE LOCKED LOO... |
4,770
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL/FREQUENCY SY... |
7,530
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
3,010
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
6,570
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL/FREQUENCY SY... |
1,860
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
7,310
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
3,710
In-stock
|
Inquiry | ||
|
National Semiconductor | LMK04806 LOW NOISE ... |
3,870
In-stock
|
Inquiry | ||
|
National Semiconductor | CLOCK GENERATOR,... |
6,430
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
6,740
In-stock
|
Inquiry | ||
|
National Semiconductor | LMX2430 3.0 GHZ/0.8 GH... |
5,530
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
5,300
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
2,050
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
6,160
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL FREQUENCY SY... |
3,860
In-stock
|
Inquiry | ||
|
National Semiconductor | PLL/FREQUENCY SY... |
6,840
In-stock
|
Inquiry | ||
|
National Semiconductor | 1 FUNC, 3MHZ, CMOS,... |
5,220
In-stock
|
Inquiry | ||
|
National Semiconductor | 555 TRANSISTOR TIM... |
5,860
In-stock
|
Inquiry | ||
|
National Semiconductor | TIMER, 2 FUNC, BIP... |
4,140
In-stock
|
Inquiry | ||
|
National Semiconductor | HIGH VOLTAGE, DUA... |
6,770
In-stock
|
Inquiry |