Overview
The ASFLMB-8.000MHz-LR-T is a surface-mount quartz crystal oscillator widely used in electronic devices requiring precise timing. Its 8.000 MHz output frequency suits applications like microcontroller clocks, RFID systems, and wireless modules. The 'LR' designation indicates low equivalent series resistance (ESR), improving energy efficiency in battery-powered devices. Manufactured with a ceramic base and hermetically sealed quartz crystal, this oscillator offers reliable performance under standard environmental conditions. Its compact 3.2 x 2.5 mm footprint aligns with modern miniaturization trends in PCB design.
Structure and Working Principle
The oscillator consists of a quartz crystal wafer sandwiched between two electrodes, enclosed in a vacuum-sealed ceramic package. When voltage is applied, the piezoelectric effect causes the crystal to vibrate at its resonant frequency (8.000 MHz), generating a stable electrical signal. Internal circuitry includes a load capacitor network to maintain oscillation stability. The 'T' suffix typically denotes tape-and-reel packaging for automated assembly. Unlike temperature-compensated (TCXO) variants, this standard oscillator relies on the inherent stability of quartz without additional calibration components.
Key Features
Frequency stability of ±50ppm ensures consistent performance in most ambient conditions, adequate for consumer electronics and industrial controls. The low-resistance design (LR) reduces power consumption, making it suitable for portable devices. With an operating temperature range of -20°C to +70°C, it covers typical commercial applications. The SMD form factor supports reflow soldering processes. Its aging rate is typically ±5ppm per year, maintaining long-term reliability without frequent recalibration.
Application Areas
Primary applications include clock generation for microcontrollers (e.g., ARM Cortex, AVR, PIC), real-time clocks (RTC), and serial communication interfaces (UART, SPI). It's also used in IoT sensor nodes, wearable devices, and automotive infotainment systems where moderate timing precision is sufficient. Industrial uses encompass PLCs, instrumentation, and barcode scanners. Consumer electronics like smart home gadgets and toys frequently integrate this oscillator due to its cost-effectiveness and compact size.
Maintenance and Precautions
Avoid exposing the oscillator to excessive mechanical shock or vibration, which may damage the quartz crystal. Storage should be in dry, static-free environments to prevent moisture absorption or ESD damage. During PCB assembly, adhere to reflow soldering profiles recommended by the manufacturer (typically peak temperatures of 260°C for ≤10 seconds). Post-solder cleaning should use non-corrosive agents to preserve the ceramic package's integrity.
B2B Procurement Guide
Bulk purchases (reels of 1,000–3,000 units) commonly reduce per-unit costs by 15–30%. Verify manufacturer certifications (e.g., ISO 9001) and RoHS compliance for environmental regulations. Lead times vary from 2–8 weeks; consider stocking agreements for high-volume production. Technical support for integration (e.g., layout guidelines to minimize EMI) is often provided by suppliers. Compare datasheet parameters like drive level and phase noise for critical applications.
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