The **387LP-R** is an electronic component primarily associated with the **387 series** of low-power, surface-mount (SMD) quartz crystal oscillators or specialized RF components. Depending on the manufacturer (commonly components like those from *CTS*, *Fox*, or *Epson*), the "LP" typically signifies "Low Power" or "Low Profile," and the "R" often indicates "RoHS Compliant" or "Tape & Reel" packaging. Below is a detailed breakdown of the electronic characteristics typically found in this part class: --- ### 1. General Specifications Most components with this numbering scheme follow these physical and electrical parameters: | Feature | Typical Specification | | :--- | :--- | | **Package Type** | SMD (Surface Mount Device) | | **Dimensions** | Often 7.0mm x 5.0mm or 3.2mm x 2.5mm | | **Mounting Type** | SMT (Surface Mount Technology) | | **Output Type** | CMOS / HCMOS | | **Power Consumption** | Low Power (Optimized for battery-operated devices) | | **Compliance** | RoHS / REACH Compliant | --- ### 2. Key Electronic Attributes #### A. Frequency Stability The "387" series parts are designed to maintain a precise frequency output. They usually operate within a stability range of **±25ppm to ±50ppm** (parts per million) across a wide temperature range (e.g., -40°C to +85°C). #### B. Supply Voltage ($V_{dd}$) These parts are designed to operate at standard logic levels: * **1.8V** (Ultra-low power) * **2.5V** * **3.3V** (Most common) #### C. Enable/Disable Function Pin 1 is frequently used for an **Output Enable (OE)** or **Standby** function. This allows the system to shut down the clock signal to conserve power when the device is idle, which is a hallmark of "LP" (Low Power) variants. --- ### 3. Part Number Decoding (Typical) | Segment | Meaning | | :--- | :--- | | **387** | Base Series / Model number defining the footprint and internal architecture. | | **LP** | **Low Power** (Reduced current consumption) or **Low Profile** (Height < 1.0mm). | | **-R** | **RoHS Compliant** (Lead-free) or **Reel** (Supplied on a 7" or 13" tape reel). | --- ### 4. Common Applications Due to its low-power nature and SMD form factor, the 387LP-R is commonly found in: * **IoT Devices:** Battery-powered sensors and controllers. * **Wearables:** Smartwatches and fitness trackers. * **Networking:** Compact routers and small-scale wireless modules. * **Industrial Electronics:** Embedded systems requiring stable timing in a small footprint. ---