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Microchip Technology VMK4-1EE-12-32K7680000
- Part No.:
- VMK4-1EE-12-32K7680000
- Manufacturer:
- Microchip Technology
- Category:
- Crystals
- Package:
- 2-SMD, No Lead
- Datasheet:
-
VMK4-1EE-12-32K7680000.pdf
- Description:
- 2X1.2MM TUNING FORK CRYSTAL, +/-
- Quantity:
- Payment:
- Shipping:
Inventory:7,236
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Product details
Overview
VMK4-1EE-12-32K7680000 from Microchip Technology is a 32.768 kHz fundamental-mode tuning fork crystal in a 2.0 mm × 1.2 mm CDFP package, with ±20 ppm frequency tolerance at +25°C, –40°C to +85°C operating temperature range, and 12.5 pF load capacitance - used as the timing reference for real-time clocks and low-power microcontrollers in space-constrained wearable and IoT devices.
For engineers reviewing the VMK4-1EE-12-32K7680000 datasheet, VMK4-1EE-12-32K7680000 pinout, VMK4-1EE-12-32K7680000 application, or VMK4-1EE-12-32K7680000 equivalent, key selection considerations include aging performance (±3 ppm/yr), ESR (≤90 kΩ), motional capacitance (4.7 fF), and compatibility with RoHS-compliant lead-free reflow profiles per JEDEC J-STD-020.
Technical Context
This 2-lead passive quartz crystal operates in fundamental tuning fork mode at 32.768 kHz, optimized for low-drive-level oscillator circuits (≤1.0 µW) and exhibits parabolic frequency vs. temperature behavior with turnover near 25°C. Its stability over temperature is characterized by –0.045 ppm/°C² curvature coefficient.
Designed for integration into CMOS-based RTC oscillator circuits, it requires external load capacitors matching its specified 12.5 pF CL value and supports standard SMT reflow per MIL-STD-202-210B and JEDEC J-STD-020 MSL 1 classification - no moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Frequency | 32.768 kHz - precise base frequency for 1 Hz clock division in RTCs and sleep-mode timing. |
| Frequency Tolerance | ±20 ppm at +25°C - ensures initial timekeeping accuracy within ±1.7 seconds per day before calibration. |
| Operating Temperature | –40°C to +85°C - enables reliable operation in industrial and automotive cabin environments. |
| Load Capacitance | 12.5 pF - defines required external capacitor value for accurate oscillation frequency in Pierce oscillator topology. |
| ESR | ≤90 kΩ - low motional resistance supports stable start-up and low-power operation in battery-powered systems. |
| Aging (1st Year) | ±3 ppm - predicts long-term drift impact on timekeeping accuracy over product lifetime. |
| Motional Capacitance | 4.7 fF - determines oscillator loop gain margin and influences circuit sensitivity to stray capacitance. |
Pinout & Package
VMK4-1EE-12-32K7680000 uses a 2-lead CDFP (Ceramic Dual Flat Package) measuring 2.0 mm × 1.2 mm with bottom-side solder pads. Pin one is identified by a dot or delta mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Oscillator Input / Crystal Terminal A | Connects to inverter input or XTAL1 node in RTC IC; forms half of resonant path. |
| Terminal 2 | Oscillator Output / Crystal Terminal B | Connects to inverter output or XTAL2 node; completes resonant loop with load capacitors to ground. |
Key Features
| Feature | Design Value |
|---|---|
| ±20 ppm Initial Accuracy | Enables sub-second daily timekeeping without factory calibration in cost-sensitive consumer devices. |
| –40°C to +85°C Operating Range | Supports deployment in extended-temperature environments such as smart meters and medical wearables. |
| RoHS-Compliant & Lead-Free Assembly Compatible | Meets global environmental regulations and qualifies for standard Pb-free reflow profiles (J-STD-020). |
| Low Drive Level (≤1.0 µW) | Minimizes power consumption and mechanical stress, extending crystal life in battery-operated applications. |
| MSL 1 Moisture Sensitivity | Eliminates bake requirements prior to assembly, reducing manufacturing complexity and cost. |
Applications
| Real-Time Clock Modules | Bluetooth Low Energy Peripherals |
|---|---|
Use Scenario: Maintaining accurate wall-clock time during deep-sleep modes in battery-powered RTCC modules. IC Role / Device Role / Timing Role: Primary 32.768 kHz reference oscillator for RTC IP blocks in microcontrollers or dedicated RTC ICs. Use Value: Enables <1.7 sec/day time error at room temperature and stable 1 Hz output across –40°C to +85°C for multi-year device operation. | Use Scenario: Providing wake-up timing and protocol timing reference in BLE beacons and sensor nodes. IC Role / Device Role / Timing Role: Low-power timing source for BLE stack sleep/wake cycles and advertising interval generation. Use Value: Supports ultra-low standby current (<1 µA typical) while meeting Bluetooth SIG timing accuracy requirements for connection intervals. |
| Medical Hearing Aids | Smart Utility Meters |
Use Scenario: Synchronizing audio processing and wireless telemetry in miniaturized hearing aids. IC Role / Device Role / Timing Role: Precision timing element for DSP clocking and RF synchronization in Class II medical devices. Use Value: Delivers stable 32.768 kHz signal in 2.0 mm × 1.2 mm footprint, enabling compact form factor without compromising timebase reliability. | Use Scenario: Time-stamping energy consumption data and enabling secure firmware updates via time-based cryptographic keys. IC Role / Device Role / Timing Role: Core timing reference for metrology SoCs and secure boot timestamping logic. Use Value: ±3 ppm/year aging and –40°C to +85°C operation ensure decade-long accuracy compliance with ANSI C12.1 and IEC 62053 standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar crystal resonator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ABM3B-32.768KHZ-12-7-T3 | 3.2 mm × 1.5 mm SMD package; 12 pF CL; ±20 ppm tolerance; ESR ≤70 kΩ | Larger footprint; lower ESR supports higher gain margin in marginal oscillator designs | Select when board layout allows larger package and oscillator circuit requires lower impedance drive. |
| ECX-327MVLF | 2.0 mm × 1.2 mm SMD; 12.5 pF CL; ±20 ppm; ESR ≤80 kΩ; –40°C to +85°C | Same footprint and CL; slightly lower ESR; different aging spec (±5 ppm/yr) | Valid alternative where tighter ESR budget is needed but longer-term aging tolerance can be relaxed. |
Compared with ABM3B-32.768KHZ-12-7-T3 and ECX-327MVLF, VMK4-1EE-12-32K7680000 offers identical package size and load capacitance but trades slightly higher ESR for proven aging performance (±3 ppm/yr) and full Microchip qualification to MIL-STD-883 reliability standards.
Availability
VMK4-1EE-12-32K7680000 is available at Aetrix Electronics and suitable for real-time clock modules, Bluetooth Low Energy peripherals, and medical hearing aids requiring stable component supply with guaranteed long-term availability.
Supply support for VMK4-1EE-12-32K7680000 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and timing solutions, with global design, manufacturing, and support infrastructure.
The VMK series is part of Microchip's precision timing portfolio, engineered specifically for ultra-low-power, high-reliability 32.768 kHz reference applications in portable and mission-critical embedded systems.
FAQ
What is the nominal frequency and mode of operation for VMK4-1EE-12-32K7680000?
The VMK4-1EE-12-32K7680000 operates at a nominal frequency of 32.768 kHz in fundamental tuning fork mode. This configuration delivers optimal phase noise and aging performance for real-time clock applications. Its mechanical resonance structure is optimized for low-power, high-stability operation - a defining characteristic of the VMK4-1EE-12-32K7680000 within Microchip's timing portfolio.
What load capacitance does VMK4-1EE-12-32K7680000 require for accurate frequency operation?
VMK4-1EE-12-32K7680000 requires a 12.5 pF load capacitance to achieve its specified ±20 ppm frequency tolerance. This value must be matched by the sum of external capacitors and PCB stray capacitance in the oscillator circuit. Deviations from 12.5 pF will shift the actual oscillation frequency - a critical design constraint for the VMK4-1EE-12-32K7680000 in precision timing applications.
Is VMK4-1EE-12-32K7680000 compatible with lead-free reflow processes?
Yes, VMK4-1EE-12-32K7680000 is fully compatible with lead-free reflow per JEDEC J-STD-020 and MIL-STD-202-210B. It is rated MSL 1, meaning it can be stored indefinitely at ambient conditions without baking. The ceramic CDFP package and matte tin terminations of the VMK4-1EE-12-32K7680000 withstand peak reflow temperatures up to 260°C for ≤10 seconds.
What is the aging specification for VMK4-1EE-12-32K7680000 over its first year of operation?
The VMK4-1EE-12-32K7680000 exhibits ±3 ppm aging over its first year of operation at +25°C, as verified per Microchip DS20006440A. This low aging rate directly contributes to long-term timekeeping accuracy in applications such as smart meters and medical devices where recalibration is impractical. The aging performance is a confirmed specification of the VMK4-1EE-12-32K7680000, not an estimate.
Can VMK4-1EE-12-32K7680000 be cleaned using ultrasonic methods?
No - ultrasonic cleaning is explicitly discouraged for VMK4-1EE-12-32K7680000 due to risk of electrical resonance deterioration or structural damage. Microchip's DS20006440A states that tuning fork crystals like the VMK4-1EE-12-32K7680000 operate near ultrasonic frequencies, making them susceptible to mechanical overstress. If ultrasonic cleaning is unavoidable, full pre- and post-process functional qualification of each VMK4-1EE-12-32K7680000 unit is mandatory.
VMK4-1EE-12-32K7680000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- VMK4
- Package/Case:
- 2-SMD, No Lead
- Packaging:
- Strip
- Product Status:
- Active
- Type:
- kHz Crystal (Tuning Fork)
- Frequency:
- 32.768 kHz
- Frequency Stability:
- -
- Frequency Tolerance:
- ±20ppm
- Load Capacitance:
- 12.5pF
- ESR (Equivalent Series Resistance):
- 90 kOhms
- Operating Mode:
- Fundamental
- Operating Temperature:
- -40°C ~ 85°C
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
- Size / Dimension:
- 0.079" L x 0.047" W (2.00mm x 1.20mm)
- Height - Seated (Max):
- 0.024" (0.60mm)
VMK4-1EE-12-32K7680000 FAQ
1.How can I place an order for VMK4-1EE-12-32K7680000 through Aetrix?
Please submit a Request for Quotation (RFQ) for VMK4-1EE-12-32K7680000 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VMK4-1EE-12-32K7680000 reliable?
The price and inventory of VMK4-1EE-12-32K7680000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VMK4-1EE-12-32K7680000 is usually 5 days.
3.What payment methods are accepted for VMK4-1EE-12-32K7680000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VMK4-1EE-12-32K7680000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VMK4-1EE-12-32K7680000?
VMK4-1EE-12-32K7680000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VMK4-1EE-12-32K7680000 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VMK4-1EE-12-32K7680000?
For technical support, including VMK4-1EE-12-32K7680000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VMK4-1EE-12-32K7680000 requirements.
6.How does Aetrix verify that VMK4-1EE-12-32K7680000 is sourced from the original manufacturer or authorized distributors?
All VMK4-1EE-12-32K7680000 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VMK4-1EE-12-32K7680000 meets industry standards.
7.What is the process for return or replacement of VMK4-1EE-12-32K7680000?
All VMK4-1EE-12-32K7680000 units undergo pre-shipment inspection (PSI). If there is an issue with VMK4-1EE-12-32K7680000, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VMK4-1EE-12-32K7680000 part is unused and in its original packaging.
Return procedure for VMK4-1EE-12-32K7680000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VMK4-1EE-12-32K7680000 Tags
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