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.

3,736 Records
Image Part Manufacturer Description Stock Action
DS1251WP-C01+ Analog Devices, Inc.
IC RTC PHANTOM PA...
2,170
In-stock
Inquiry
DS1251WP-C02+ Analog Devices, Inc.
IC RTC PHANTOM PA...
3,360
In-stock
Inquiry
DS1254WB2-150 Analog Devices, Inc.
IC RTC PHANTOM PA...
5,240
In-stock
Inquiry
DS1254WB-C02 Analog Devices, Inc.
IC RTC PHANTOM PA...
2,210
In-stock
Inquiry
DS12R887-33 Analog Devices, Inc.
IC RTC CLK/CALEND...
1,330
In-stock
Inquiry
DS12R887-5 Analog Devices, Inc.
IC RTC CLK/CALEND...
6,020
In-stock
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DS1318 Analog Devices, Inc.
IC RTC ELAPSED CN...
4,120
In-stock
Inquiry
DS1337C Analog Devices, Inc.
IC RTC CLK/CALEND...
1,530
In-stock
Inquiry
DS1337C/T&R Analog Devices, Inc.
IC RTC CLK/CALEND...
1,320
In-stock
Inquiry
DS1339C-33 Analog Devices, Inc.
IC RTC CLK/CALEND...
1,020
In-stock
Inquiry
DS1339U-33 Analog Devices, Inc.
IC RTC CLK/CALEND...
7,120
In-stock
Inquiry
DS1371U Analog Devices, Inc.
IC RTC BINARY CNT...
3,580
In-stock
Inquiry
DS1374U-33 Analog Devices, Inc.
IC RTC BINARY CNT...
2,510
In-stock
Inquiry
DS1391U-33 Analog Devices, Inc.
IC RTC CLK/CALEND...
7,820
In-stock
Inquiry
DS1682S/T&R Analog Devices, Inc.
IC RTC ELAPSED CN...
2,580
In-stock
Inquiry
DS3231S Analog Devices, Inc.
IC RTC CLK/CALEND...
2,440
In-stock
Inquiry
DS3231S/T&R Analog Devices, Inc.
IC RTC CLK/CALEND...
3,470
In-stock
Inquiry
DS12885TN+ Analog Devices, Inc.
IC RTC CLK/CALEND...
3,950
In-stock
Inquiry
DS17485E-5+ Analog Devices, Inc.
IC RTC CLK/CALEND...
3,150
In-stock
Inquiry
DS17285E-3+ Analog Devices, Inc.
IC RTC CLK/CALEND...
5,230
In-stock
Inquiry