The **M-1C5-R** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) Quartz Crystal** or a **Crystal Oscillator**, often associated with Micro Crystal (a Swatch Group company). It is widely used in timing applications where low power consumption and a small footprint are critical. --- ## 1. Technical Specifications The following table outlines the primary electrical and physical characteristics of the M-1C5-R: | Feature | Specification | | :--- | :--- | | **Frequency Range** | Usually 32.768 kHz (Standard for RTC) | | **Package Type** | Metal Lid, Ceramic Package (SMD) | | **Frequency Tolerance** | ±20 ppm to ±100 ppm (typical) | | **Load Capacitance** | 7.0 pF to 12.5 pF | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | | **Mounting Style** | Surface Mount (SMT) | --- ## 2. Key Internal Components The "Electronic Parts" within this device are integrated into a hermetically sealed unit: 1. **Quartz Blank:** The heart of the component. It is a high-purity synthetic quartz wafer cut at a specific angle (usually XY-cut for low frequencies) to vibrate at the desired frequency when voltage is applied. 2. **Electrodes:** Thin layers of gold or silver deposited on the quartz surface to provide electrical contact. 3. **Ceramic Base:** Provides high insulation and thermal stability to protect the quartz crystal. 4. **Kovar/Metal Lid:** Seams-sealed to the ceramic base to create a vacuum-tight environment, preventing moisture from affecting the oscillation frequency. --- ## 3. Typical Pin Configuration While small, the footprint follows standard SMD layouts: ```text [ Top View ] ___________________ | (4) (3) | | +-----------+ | | | | | | +-----------+ | | (1) (2) | --------------------- Pin 1 & 2: Crystal Connection Pin 3 & 4: Ground (Metal Lid connection) ``` --- ## 4. Common Applications Due to its low power requirements, the M-1C5-R is frequently found in: * **Real-Time Clocks (RTC):** Keeping time in computers and embedded systems. * **IoT Devices:** Low-power wireless sensors requiring precise wake-up intervals. * **Wearables:** Smartwatches and fitness trackers where PCB space is limited. * **Automotive:** Keyless entry systems and dashboard clocks.