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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.

3,736 Records
Image Part Manufacturer Description Stock Action
DS1747WP-120IND Analog Devices, Inc.
IC RTC CLK/CALEND...
1,110
In-stock
Inquiry
DS1747P-70IND Analog Devices, Inc.
IC RTC CLK/CALEND...
7,230
In-stock
Inquiry
DS1557WP-120IND Analog Devices, Inc.
IC RTC CLK/CALEND...
3,790
In-stock
Inquiry
DS1557P-70IND Analog Devices, Inc.
IC RTC CLK/CALEND...
3,280
In-stock
Inquiry
DS1251W-120 Analog Devices, Inc.
IC RTC PHANTOM PA...
4,020
In-stock
Inquiry
DS1251Y-70 Analog Devices, Inc.
IC RTC PHANTOM PA...
2,280
In-stock
Inquiry
DS1251WP-120IND Analog Devices, Inc.
IC RTC PHANTOM PA...
5,330
In-stock
Inquiry
DS1747-70IND Analog Devices, Inc.
IC RTC CLK/CALEND...
4,820
In-stock
Inquiry
DS1747W-120IND Analog Devices, Inc.
IC RTC CLK/CALEND...
7,100
In-stock
Inquiry
DS1251W-120IND Analog Devices, Inc.
IC RTC PHANTOM PA...
6,050
In-stock
Inquiry
DS1254WB-150 Analog Devices, Inc.
IC RTC PHANTOM PA...
7,950
In-stock
Inquiry
DS1254YB-100 Analog Devices, Inc.
IC RTC PHANTOM PA...
6,630
In-stock
Inquiry
DS1501YSN Analog Devices, Inc.
IC RTC CLK/CALEND...
1,280
In-stock
Inquiry
DS1673S-5 Analog Devices, Inc.
IC RTC SYSTEM CTR...
6,510
In-stock
Inquiry
DS17285E-3 Analog Devices, Inc.
IC RTC CLK/CALEND...
6,720
In-stock
Inquiry
DS17285E-5 Analog Devices, Inc.
IC RTC CLK/CALEND...
6,060
In-stock
Inquiry
DS1677E Analog Devices, Inc.
IC RTC SYSTEM CTR...
2,150
In-stock
Inquiry
DS17285SN-5 Analog Devices, Inc.
IC RTC CLK/CALEND...
5,580
In-stock
Inquiry
DS17285SN-3 Analog Devices, Inc.
IC RTC CLK/CALEND...
6,470
In-stock
Inquiry
DS1500YN Analog Devices, Inc.
IC RTC CLK/CALEND...
7,610
In-stock
Inquiry