Product Overview
20.000 MHz Surface Mount HC-49/US Microcontroller Timing Resonator
Condition
Unused new old stock (NOS). Laser marking on each low-profile metal can reads E20.000. Visual inspection confirms clean surface-mount solder pads with no signs of installation or handling wear.
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Product Overview
The E20.000 is a 20.000 MHz quartz crystal resonator housed in an industry-standard HC-49/US SMD (HC-49S/SMD) low-profile metal package. Designed for parallel resonance timing applications, this two-pad passive component provides a fundamental reference clock for microcontrollers, communication interfaces, and embedded digital logic circuits.
Key Features
- Nominal Frequency: 20.000 MHz
- Package / Case: HC-49/US SMD (low-profile resistance-weld metal can)
- Termination: 2 surface-mount flat solder pads
- Marking: E20.000 laser-etched on package top
- Operating Type: Passive quartz crystal resonator
Applications
- Generating 20 MHz master clock signals on microcontroller boards including AVR, PIC, and STM32 designs
- Benchtop repairs and component replacements on communication and industrial control boards
- Timing clock sources for custom DIY synthesizers, digital audio equipment, and hobby electronics
Frequently Asked Questions
Is this an active oscillator or a passive crystal?
This is a passive two-pad quartz crystal resonator. It relies on the microcontroller or circuit's internal oscillator inverter and external load capacitors to oscillate.
What package footprint does this unit use?
It uses the standard HC-49/US SMD footprint (also referenced as HC-49S/SMD), featuring two opposing surface-mount pads on a low-profile metal can.
Why buy individual components instead of a full production reel?
Purchasing surplus from PartsMine allows you to obtain the exact count required for prototyping or maintenance runs without committing budget to bulk packaging. More pieces cost less each, and the price-break table on this page shows what each quantity costs. Orders ship for an $8 flat rate, qualify for free shipping over $28, and leave our Idaho warehouse the same or next business day.
A steady 20 MHz heartbeat doesn't need fuss, just the right slice of quartz cut to keep time. Drop it onto the pads and let the clock run.
