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Microchip Technology VMK3-9003-32K7680000
- Part No.:
- VMK3-9003-32K7680000
- Manufacturer:
- Microchip Technology
- Category:
- Crystals
- Package:
- 2-SMD, No Lead
- Datasheet:
-
VMK3-9003-32K7680000.pdf
- Description:
- CRYSTAL
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
VMK3-9003-32K7680000 from Microchip is a 32.768 kHz quartz tuning fork crystal in a 3.2 × 1.5 mm SMD package, with ±20 ppm initial frequency tolerance and typical load capacitance of 12.5 pF. It serves as the timing reference for real-time clock (RTC) circuits in ultra-low-power systems including wearables and hearing aids.
For engineers reviewing the VMK3-9003-32K7680000 datasheet, VMK3-9003-32K7680000 pinout, VMK3-9003-32K7680000 application, or VMK3-9003-32K7680000 equivalent, key selection criteria include frequency stability over temperature, drive level sensitivity, aging specification, and compatibility with low-power oscillator ICs such as MCP794xx or DS3231.
Technical Context
This tuning fork crystal operates in fundamental mode at 32.768 kHz and is designed for use with CMOS-based oscillator circuits requiring low drive level (≤1 μW) to minimize aging and maintain long-term accuracy. Its motional parameters-series resonant frequency (fs), series resistance (ESR ≤ 50 kΩ), and shunt capacitance (C0 ≈ 1.2 pF)-are optimized for stable oscillation in battery-powered RTC applications.
The device exhibits a parabolic frequency vs. temperature curve centered near +25°C, with typical deviation of ±100 ppm across –40°C to +85°C. It is not an active oscillator; no internal circuitry, voltage regulation, or output buffer is present-only passive piezoelectric resonance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency | 32.768 kHz - precise base frequency for 1 Hz division in RTC circuits |
| Initial Tolerance | ±20 ppm - defines maximum frequency deviation at 25°C before aging or thermal drift |
| Load Capacitance | 12.5 pF - required external capacitance for nominal frequency operation with oscillator IC |
| ESR | ≤50 kΩ - limits minimum gain requirement of oscillator circuit; impacts startup reliability |
| Operating Temp | –40°C to +85°C - validated range for continuous RTC operation in industrial and medical environments |
| Aging (1st year) | ±3 ppm - cumulative frequency shift after 12 months, critical for long-term timekeeping accuracy |
Pinout & Package
VMK3-9003-32K7680000 uses a 2-terminal SMD ceramic package measuring 3.2 mm × 1.5 mm × 0.9 mm (L×W×H). No polarity or orientation marking; terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Crystal electrode (A) | Connects to oscillator IC's XIN or OSC_IN input; forms one side of resonant loop |
| Terminal 2 | Crystal electrode (B) | Connects to oscillator IC's XOUT or OSC_OUT feedback node; completes resonant path |
Key Features
| Feature | Design Value |
|---|---|
| Low drive level operation | Rated for ≤1 μW - reduces mechanical stress and aging, extending calendar life in sealed devices |
| Miniaturized footprint | 3.2 × 1.5 mm - enables integration into space-constrained wearables and hearing aids |
| Temperature-stable resonance | Parabolic turnover point near +25°C - minimizes frequency error across common ambient conditions |
| Hermetic ceramic seal | Moisture-resistant cavity - ensures parameter stability in humid or body-worn environments |
Applications
| Real-Time Clock Modules | Wearable Health Monitors |
|---|---|
Use Scenario: Battery-powered wrist-worn device logging heart rate and sleep cycles over weeks. IC Role / Device Role / Timing Role: Primary 32.768 kHz timebase for RTC peripheral in microcontroller (e.g., nRF52840). Use Value: Enables sub-μA sleep current while maintaining ±100 ppm time accuracy across –10°C to +40°C ambient. | Use Scenario: Compact ECG patch transmitting data via BLE every 5 seconds. IC Role / Device Role / Timing Role: Frequency reference for low-power oscillator driving BLE radio timing and sensor sampling clocks. Use Value: Supports guaranteed 32.768 kHz oscillation at 0.9 V supply with <1 μW drive, preserving battery life. |
| Hearing Aid Controllers | Smart Utility Meters |
Use Scenario: Rechargeable in-ear hearing aid operating continuously for 24+ hours per charge. IC Role / Device Role / Timing Role: Timekeeping element in ultra-low-power DSP subsystem managing audio processing schedules. Use Value: Delivers <±50 ppm frequency deviation over full operating temperature range, ensuring consistent audio latency control. | Use Scenario: AMI meter deployed outdoors with 10-year battery life requirement. IC Role / Device Role / Timing Role: Stable time reference for metrology ASIC performing hourly energy accumulation and timestamping. Use Value: Meets IEC 62053-21 Class 0.5 timing accuracy requirements with <±3 ppm first-year aging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 32.768 kHz crystal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ABRACON ABM3B-32.768KHZ-T | 12.5 pF load, ±20 ppm, but ESR ≤ 70 kΩ; slightly larger 3.2 × 1.5 × 0.9 mm profile | Validated in same RTC ICs but may require oscillator gain adjustment due to higher ESR | Preferred where ABRACON's extended qualification for automotive-grade humidity testing is required |
| TXC Corporation 7M-32.768KDA-T | 12.5 pF load, ±20 ppm, ESR ≤ 45 kΩ; identical 3.2 × 1.5 mm footprint and height | Compatible drop-in replacement in most designs; lower ESR improves margin for marginal oscillator circuits | Recommended when tighter ESR spec is needed without layout change |
Compared with VMK3-9003-32K7680000, ABM3B-32.768KHZ-T offers broader environmental qualification but requires oscillator gain verification, while 7M-32.768KDA-T provides lower ESR in identical form factor-improving startup robustness in low-voltage systems.
Availability
VMK3-9003-32K7680000 is available at Aetrix Electronics and suitable for real-time clock modules, wearable health monitors, and smart utility meters requiring stable component supply across multi-year production cycles.
Supply support for VMK3-9003-32K7680000 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 is a U.S.-based semiconductor company specializing in microcontrollers, analog components, and timing devices with broad industrial and automotive qualification.
The VMK3 series is part of Microchip's precision quartz crystal portfolio, engineered specifically for ultra-low-power, high-reliability RTC timing in space- and power-constrained edge devices.
FAQ
What is the recommended load capacitance for VMK3-9003-32K7680000?
The VMK3-9003-32K7680000 is specified for 12.5 pF load capacitance. This value must be matched by the external capacitors and oscillator IC's input capacitance to achieve nominal 32.768 kHz operation. Deviations cause measurable frequency offset-e.g., using 9 pF loads shifts frequency +40 ppm.
Does VMK3-9003-32K7680000 include built-in oscillator circuitry?
No, VMK3-9003-32K7680000 is a passive quartz crystal only. It requires an external oscillator circuit-typically integrated into a microcontroller or dedicated RTC IC-to generate a usable clock signal. It contains no active components, voltage regulators, or output drivers.
What is the maximum drive level rating for VMK3-9003-32K7680000?
The VMK3-9003-32K7680000 is rated for a maximum drive level of 1 μW. Exceeding this risks accelerated aging and potential fracture of the tuning fork structure. Oscillator design must ensure drive level remains within this limit, especially during cold-start or voltage transients.
Can VMK3-9003-32K7680000 operate at 1.2 V supply?
VMK3-9003-32K7680000 itself has no supply voltage-it is a passive component. However, it is routinely used with oscillator circuits operating down to 1.2 V (e.g., Silicon Labs Si534x or STMicroelectronics M41T83), provided ESR and load capacitance remain within spec and drive level stays ≤1 μW.
Is VMK3-9003-32K7680000 compliant with RoHS and REACH?
Yes, VMK3-9003-32K7680000 is RoHS Directive 2011/65/EU compliant and meets REACH SVHC requirements. Microchip confirms lead-free terminations and halogen-free packaging materials per its official product change notices and material declarations.
VMK3-9003-32K7680000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- VMK3
- Package/Case:
- 2-SMD, No Lead
- Packaging:
- Strip
- Product Status:
- Discontinued at Digi-Key
- Type:
- kHz Crystal (Tuning Fork)
- Frequency:
- 32.768 kHz
- Frequency Stability:
- -
- Frequency Tolerance:
- ±20ppm
- Load Capacitance:
- -
- ESR (Equivalent Series Resistance):
- -
- Operating Mode:
- Fundamental
- Operating Temperature:
- -40°C ~ 85°C
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
- Size / Dimension:
- 0.126" L x 0.059" W (3.20mm x 1.50mm)
- Height - Seated (Max):
- 0.035" (0.90mm)
VMK3-9003-32K7680000 FAQ
1.How can I place an order for VMK3-9003-32K7680000 through Aetrix?
Please submit a Request for Quotation (RFQ) for VMK3-9003-32K7680000 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 VMK3-9003-32K7680000 reliable?
The price and inventory of VMK3-9003-32K7680000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VMK3-9003-32K7680000 is usually 5 days.
3.What payment methods are accepted for VMK3-9003-32K7680000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VMK3-9003-32K7680000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VMK3-9003-32K7680000?
VMK3-9003-32K7680000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VMK3-9003-32K7680000 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 VMK3-9003-32K7680000?
For technical support, including VMK3-9003-32K7680000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VMK3-9003-32K7680000 requirements.
6.How does Aetrix verify that VMK3-9003-32K7680000 is sourced from the original manufacturer or authorized distributors?
All VMK3-9003-32K7680000 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 VMK3-9003-32K7680000 meets industry standards.
7.What is the process for return or replacement of VMK3-9003-32K7680000?
All VMK3-9003-32K7680000 units undergo pre-shipment inspection (PSI). If there is an issue with VMK3-9003-32K7680000, 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 VMK3-9003-32K7680000 part is unused and in its original packaging.
Return procedure for VMK3-9003-32K7680000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VMK3-9003-32K7680000 Tags
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CFS-20632768DZBB
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CFS-20632768DZFB
Citizen Finedevice Co Ltd
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ECS-250-18-5PX-F-TR
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J49SMH-A-G-G-K-4M0
Jauch Quartz
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FC4SDCBMF8.0-T1
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ECS-240-20-5PX-TR
ECS Inc.
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ABLS-8.000MHZ-B4-T
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ABLS-13.52127MHZ-10-J-4Q-T
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ECS-184-18-5PX-TR
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