16MHz Crystal Oscillator HC-49S – Quartz Crystal for Arduino, AVR & Microcontroller Clock
The 16MHz Crystal Oscillator in the HC-49S package is a fundamental timing component for digital electronics and microcontroller circuits. This quartz crystal provides a precise 16.000 MHz clock signal that serves as the heartbeat for your microcontroller projects. It is the exact same frequency used by the Arduino Uno (ATmega328P), Arduino Nano, and countless AVR-based development boards, making it an essential spare or prototyping part for every electronics enthusiast, engineering student, and IoT hobbyist in India. The HC-49S is a low-profile, through-hole package that is easy to solder onto perfboards, stripboards, and custom PCBs. Unlike the taller HC-49/U variant, the HC-49S sits closer to the board, saving vertical space in compact enclosures. This crystal works with the internal Pierce oscillator circuit built into most microcontrollers — simply connect it across the XTAL1 and XTAL2 pins with two load capacitors (typically 22pF each) and your MCU will run at a rock-solid 16 MHz. Why keep a few of these in your component bin? Crystals can get damaged from physical shock, overheating during soldering, or electrostatic discharge. If your Arduino suddenly stops responding or behaves erratically, a dead crystal could be the culprit. Swapping in a fresh HC-49S 16MHz crystal is a quick, low-cost repair that can bring a dead board back to life. These crystals are also perfect for building standalone ATmega328P circuits on a breadboard — the classic "breadboard Arduino" project that every Indian engineering student tackles in their second or third year. Beyond Arduino, the 16MHz HC-49S is used in digital clocks, frequency counters, RF circuits, USB-to-serial converters, and any application that demands a stable, accurate timebase. TecnoMate sources these crystals from reliable manufacturers with tight frequency tolerance so your projects run reliably, semester after semester.
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About 16MHz Crystal Oscillator HC-49S – Quartz Crystal for Arduino, AVR & Microcontroller Clock
Technical Specifications
| Aging | ±5ppm per year (max) |
|---|---|
| Frequency | 16.000 MHz |
| Pin Pitch | 4.88mm (standard through-hole) |
| Dimensions | Approx. 11.5mm x 5.0mm x 3.5mm (L x W x H) |
| Drive Level | 100µW (typical) |
| Package Type | HC-49S (Low-Profile) |
| Mounting Type | Through-Hole (THT) |
| Frequency Stability | ±30ppm over -20°C to +70°C |
| Frequency Tolerance | ±20ppm to ±30ppm (at 25°C) |
| Insulation Resistance | ≥500 MΩ at 100V DC |
| Load Capacitance (CL) | 18pF – 20pF (typical) |
| Shunt Capacitance (C0) | 7pF max |
| Storage Temperature Range | -40°C to +85°C |
| Operating Temperature Range | -20°C to +70°C |
| Equivalent Series Resistance (ESR) | 40Ω max (fundamental mode) |
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