Why choosing the right timing component matters
Precise timebases are the heart of microcontrollers, radios, sensors and communication modules. Selecting the correct crystal, oscillator or resonator affects clock stability, EMI behaviour, boot timing and RF performance - not just frequency. At Communica we keep a broad range of through-hole and SMD crystals, MEMS oscillators and ceramic resonators in stock so South African makers, students and engineering teams can prototype now rather than wait weeks for imports.
Local availability and practical benefits
Buying locally matters: immediate branch collection from Samrand, Pretoria CBD or Cape Town reduces lead time and makes it easy to get VAT invoices for school, university or procurement. Check branch hours and collection options to plan urgent builds: Branches & Trading Hours.
Quick spec primer
Here are the practical specs to compare at a glance when price is one consideration among performance and availability.
| Type | Typical use | Key spec impact |
| Crystal (quartz) | MCU clocks, precision timebases | Frequency accuracy, ageing, load capacitance |
| Oscillator (XO/TCXO) | Plug-and-play clock sources, comms | Output type, stability over temp, supply voltage |
| Resonator (ceramic) | Cost-sensitive MCU clocks | Lower precision, cheaper, integrated load capacitors |
Specification callouts that affect price
When comparing prices, verify these seller-reported specs: frequency tolerance (ppm), frequency stability over temperature, load capacitance (C L ), ageing (ppm/year), package (SMD size or through-hole can affect assembly cost), and whether the part is a calibrated oscillator versus a passive crystal. Higher-stability TCXOs and MEMS-based oscillators carry a price premium but can remove downstream calibration work.
Compatibility and accessories
Match output type (CMOS, TTL, sine) to your device input. For crystals, confirm the microcontroller's supported load capacitance. We stock sockets, crystal caps and oscillator holders to simplify swaps; see our category listings for related items: Collections and the full parts index at All Products.
Compare prices without losing performance
Price comparisons are meaningful only after you normalise key specs. Use a short checklist: required frequency and tolerance, operating temperature range, output type, package and lead time. A simple price comparison table like the one below helps - we list many brands so you can pick by spec and stock status.
| Model class | Typical price band | When to choose |
| Ceramic resonator | Low | Student projects, non-critical MCU clocks |
| Standard crystal | Mid | General embedded use with low jitter needs |
| TCXO / MEMS oscillator | High | Precision comms, GPS disciplined systems |
Practical example and wiring
If a microcontroller requires a 16 MHz crystal with 18 pF load caps, wiring is straightforward:
MCU XTAL1 ---||--- Crystal ---||--- MCU XTAL2 C1 18pF C2 18pFCrystal case --- GND
For oscillators, simply wire VCC and Ground; route the output (CMOS) to the MCU clock input with proper decoupling and, for high-speed signals, short traces. If you need help matching load caps or decoupling values, our technical team at Communica can advise - learn about our company and technical ethos: About Us.
Handling objections: lead times, pricing transparency and education-use
Concerned about delivery or sudden price shifts? We publish stock status for many SKUs and offer branch pickup from Samrand for urgent orders. For larger procurement, request a formal quote or account terms; Communica supports VAT invoicing for education and institutional purchases and can bundle related accessories to simplify procurement. Start a quote or check availability in Samrand: Shop by Brand.
Summary - why buy your timing parts from Communica
We combine deep component ranges, up-to-date stock visibility and local branch collection to minimise project delays. Whether you are a student building a final-year project, a maker iterating a prototype, or a procurement team sizing a production run, our technical staff and stocked accessories reduce rework and unexpected costs. For a hands-on comparison of parts and prices, visit our homepage and then compare specs or request a quote: Communica Homepage.
Ready to match the right timing component to your project? Use our stock checker, compare spec sheets, or request a written quote to lock pricing and lead times for your build.