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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.

1,699 Records
Image Part Manufacturer Description Stock Action
SN74LS629DRG4 Texas Instruments
IC OSC DUAL VCO 20...
3,740
In-stock
Inquiry
SN74LS629NSRG4 Texas Instruments
IC OSC DUAL VCO 20...
4,740
In-stock
Inquiry
SN74S124DRG4 Texas Instruments
IC OSC DUAL VCO 60...
4,480
In-stock
Inquiry
TLC556MDG4 Texas Instruments
IC OSC TIMER DUAL...
7,200
In-stock
Inquiry
TLC555QDRG4 Texas Instruments
IC OSC SGL TIMER ...
6,220
In-stock
Inquiry
LM556CM Texas Instruments
IC OSC TIMER DUAL...
5,680
In-stock
Inquiry
LM556CMX Texas Instruments
IC OSC TIMER DUAL...
5,300
In-stock
Inquiry
LMC555CN Texas Instruments
IC OSC SINGLE TIM...
1,500
In-stock
Inquiry
LM555CN Texas Instruments
IC OSC SINGLE TIM...
4,570
In-stock
Inquiry
NE555V Texas Instruments
IC OSC SINGLE TIM...
3,370
In-stock
Inquiry
NE556V Texas Instruments
IC OSC TIMER DUAL...
2,160
In-stock
Inquiry
LM556CN Texas Instruments
IC OSC TIMER DUAL...
5,170
In-stock
Inquiry
LM556 MWC Texas Instruments
IC OSC TIMER DIE
2,560
In-stock
Inquiry
LMC555 MDA Texas Instruments
IC OSC TIMER SING...
2,520
In-stock
Inquiry
TLC555IDRG4 Texas Instruments
IC OSC SGL TIMER ...
7,000
In-stock
Inquiry
TPL5110QDDCRQ1 Texas Instruments
TPL5110-Q1 - ULTRA L...
5,380
In-stock
Inquiry
DP8573AV/NOPB Texas Instruments
IC RTC CLK/CALEND...
3,280
In-stock
Inquiry
BQ3285S-SB2 Texas Instruments
IC RTC CLK/CALEND...
4,640
In-stock
Inquiry
BQ3285LCS Texas Instruments
TIMER OR RTC, VOL...
7,920
In-stock
Inquiry
BQ3285ESS-N Texas Instruments
REAL TIME CLOCK, ...
7,580
In-stock
Inquiry