Product Overview
HC-49/S Low-Profile 24 MHz Passive Quartz Resonator
Condition
Unused new old stock (NOS). Plated metal can with straight through-hole wire leads showing no solder or handling wear. Sold each.
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Product Overview
Passive 24 MHz quartz crystal in an HC-49/S low-profile resistance-weld metal can. Provides a stable reference frequency for digital logic, microcontrollers, and communication hardware. As a passive two-terminal resonator, it pairs with an on-chip oscillator inverter and external load capacitors to establish a system clock. The compact can profile reduces overall board height while preserving standard through-hole lead spacing.
Key Features
- HC-49/S low-profile resistance-weld metal package
- 24.000 MHz nominal fundamental frequency reference
- Two straight through-hole wire leads with glass-to-metal sealed base
- Passive two-pin quartz resonator for parallel resonant oscillator circuits
- Low-profile footprint fits boards with tight vertical height constraints
Applications
- Soldering onto microcontroller, interface, or USB peripheral boards requiring a dedicated 24 MHz master clock
- Replacing damaged or aged clock crystals during radio, synthesizer, or test equipment repairs
- Assembling breadboard prototypes and timing circuits on standard perfboards
Frequently Asked Questions
Is this an active oscillator or a passive crystal?
This is a passive two-lead quartz crystal resonator. Operating it requires external oscillator circuitry, typically an internal microcontroller inverter and two load capacitors, rather than direct DC power.
Can an HC-49/S crystal replace a taller standard HC-49/U crystal?
Yes. The HC-49/S shares the same lead spacing and pin arrangement as the full-height HC-49/U package, allowing direct substitution where enclosure height is restricted. The price-break table on this page gives the price per piece at each quantity.
A quartz slice sealed inside a clean steel can, humming faithfully at twenty-four million cycles every second. Drop it onto the board and let the clockwork run.
