VMK3-9005-32K7680000TR Microchip Technology VMK3-9005-32K7680000TR Crystals
The Microchip Technology VMK3-9005-32K7680000TR is a high-performance tuning fork crystal that provides accurate 32.768 kHz oscillation for wearable, IoT, and low-power embedded systems. With its ??20ppm stability, small SMD package, and RoHS compliance, it is an excellent choice for real-time clock circuits in consumer, medical, and industrial applications.
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The VMK3-9005-32K7680000TR from Microchip Technology is a highly accurate and reliable 32.768 kHz tuning fork crystal, designed for real-time clocks (RTCs), microcontrollers (MCUs), and ultra-low-power IoT devices. Featuring ??20ppm initial frequency accuracy and ceramic hermetic sealing, this surface-mount crystal provides exceptional stability for wearables, medical devices, and Bluetooth Low Energy (BLE) applications.
Housed in a compact 3.2mm x 1.5mm package, the VMK3 series is ideal for space-constrained designs, offering high performance with low power consumption.
Key Features
✅ 32.768 kHz Fundamental Frequency ?C Precision timing for RTC circuits
✅ ??20ppm Initial Accuracy ?C Ensures long-term reliability in timing applications
✅ Wide Temperature Range (?C40??C to +85??C) ?C Stable performance in industrial & medical applications
✅ Small Footprint (3.2mm ?? 1.5mm) ?C Saves board space in wearable & IoT devices
✅ Ceramic Hermetic Sealing ?C Protects against moisture & environmental stress
✅ Lead-Free & RoHS Compliant ?C Compatible with environmentally friendly assembly
✅ Tape & Reel (TR) Packaging ?C Optimized for automated SMD assembly
Technical Specifications
Electrical Characteristics
| Parameter | Value |
|---|---|
| Frequency | 32.768 kHz (tuning fork) |
| Frequency Tolerance | ??20ppm (initial accuracy) |
| Operating Mode | Fundamental |
| Operating Temperature | ?C40??C to +85??C |
| Aging Stability | ??5ppm/year (typical) |
| Drive Level | 0.5??W (max) |
Mechanical & Package Details
| Attribute | Value |
|---|---|
| Package Type | 2-SMD, No Lead |
| Dimensions (L ?? W ?? H) | 3.20mm ?? 1.50mm ?? 0.90mm |
| Mounting Type | Surface Mount (SMD) |
| Termination | Solder Pads |
| Hermetic Sealing | Ceramic Package |
| Weight | Lightweight (~10mg) |
Applications
The VMK3-9005-32K7680000TR is optimized for battery-powered and ultra-low-power systems, including:
1. Real-Time Clocks (RTCs) & Watch ICs
- MCU backup clocking?(STM32, ESP32, etc.)
- Accurate timekeeping for smartwatches & digital clocks
2. Wearable & IoT Devices
- BLE/Wi-Fi synchronization?(smart bands, fitness trackers)
- Energy-efficient timekeeping in sensor nodes
3. Medical & Hearing Aid Electronics
- Portable health monitors
- Implantable & wearable medical sensor timing
4. Industrial & Security Systems
- Electronic access control & smart locks
- Metering & data logging equipment
5. Consumer Electronics
- Smart home automation (smart plugs, lighting control)
- Digital audio & infotainment systems
Advantages Over Competing Crystals
✅ Superior Stability (??20ppm) vs. Standard Crystals (???50ppm)
- Maintains?better timing accuracy?for?long-term applications.
✅ Smaller Footprint vs. Larger HC-49/US Crystals
- Saves PCB space?in wearables & IoT devices.
✅ Ceramic Encapsulation vs. Metal Can Crystals
- Provides?better moisture resistance & shock tolerance.
✅ Low Power Consumption (0.5??W Drive Level)
- Ideal for?battery-operated devices (CR2032, coin cells, etc.).
Recommended Circuit & PCB Layout Guidelines
Best Practices for Optimal Performance
🔹 Place Crystal Close to MCU Oscillator Pins (minimize trace length)
🔹 Avoid Running High-Speed Signals Near Crystal Traces (prevents interference)
🔹 Use Load Capacitors as per MCU Datasheet (Typically 6-12pF for RTCs)
🔹 Ensure Proper Soldering (Avoid Excessive Heat for SMT Assembly)
Comparison with Other VMK3 Series Models
| Part Number | Frequency Tolerance | Packaging | Key Distinction |
|---|---|---|---|
| VMK3-9005-32K7680000TR | ??20ppm | Tape & Reel (TR) | Standard accuracy for cost-sensitive designs |
| VMK3-1EE-09-32K7680000TR | ??10ppm | Tape & Reel (TR) | Higher precision for medical/industrial use |
| VMK3-9012-32K7680000TR | ??20ppm | Tape & Reel (TR) | Alternative model with similar specs |
Selection Guide:
- For best cost-performance balance ?? Choose VMK3-9005-32K7680000TR
- For ultra-precise timing (??10ppm) ?? Upgrade to VMK3-1EE-09
Specification: Microchip Technology VMK3-9005-32K7680000TR Crystals
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