Microchip Technology VXM9-9012-66M6666660

Overview

VXM9-9012-66M6666660 from Vectron is a 2.0 × 1.6 mm surface-mount quartz crystal resonator operating at 66.666666 MHz, fundamental mode, AT-cut, with ±10 ppm frequency tolerance and ±10 ppm stability over –40 °C to +85 °C. It serves as the primary timing reference in compact wireless transceivers requiring low-phase-noise clock generation.

For engineers reviewing the VXM9-9012-66M6666660 datasheet, VXM9-9012-66M6666660 pinout, VXM9-9012-66M6666660 application, or VXM9-9012-66M6666660 equivalent, key selection criteria include load capacitance (12 pF), ESR (≤80 Ω), aging (±5 ppm/year), RoHS compliance, and MSL 1 reflow compatibility.

Technical Context

This crystal is designed for series-resonant operation with no internal load capacitors, requiring external matching to 12 pF. Its AT-cut quartz blank delivers stable frequency vs. temperature performance across industrial-grade thermal ranges.

The device uses gold-over-nickel contact pads compatible with both SnPb and Pb-free soldering, and meets MIL-STD-883 mechanical shock, vibration, and temperature cycle requirements per Table 3.

Key Specifications

Pinout & Package

2.0 × 1.6 × 0.55 mm ceramic SMD package with metal lid; hermetically sealed, gold-plated Ni contact pads (MSL 1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar crystal resonator applications.

Compared with ABM10-66.6666MHZ-B2-T and FA-238 66.666666MHz 12pF, the VXM9-9012-66M6666660 uniquely combines industrial temperature range (–40 °C to +85 °C), 2.0 × 1.6 mm miniaturization, and ≤80 Ω ESR-enabling high-reliability timing in thermally constrained, space-limited embedded systems without layout or firmware compromise.

Availability

VXM9-9012-66M6666660 is available at Aetrix Electronics and suitable for wireless IoT sensor nodes, USB 2.0 peripheral controllers, and industrial CAN FD gateways requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for VXM9-9012-66M6666660 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

Vectron International, now part of Microchip Technology, designs and manufactures precision frequency control components including crystals, oscillators, and filters for industrial, automotive, and communications markets.

The VXM9 series targets miniaturized, high-stability crystal resonators for space-constrained embedded systems where thermal resilience and reflow robustness are critical design constraints.

FAQ

What is the nominal frequency and tolerance of the VXM9-9012-66M6666660?

The VXM9-9012-66M6666660 has a nominal frequency of 66.666666 MHz with a frequency tolerance of ±10 ppm at 25 °C. This tolerance ensures initial accuracy within ±0.667 Hz, meeting tight timing requirements for USB 2.0 and Bluetooth LE applications. The VXM9-9012-66M6666660 maintains this specification across its full operating temperature range of –40 °C to +85 °C.

Does the VXM9-9012-66M6666660 require external load capacitors?

Yes, the VXM9-9012-66M6666660 is a series-resonant crystal requiring external load capacitors totaling 12 pF to match its specified load capacitance. These capacitors must be placed symmetrically between Pins 1 and 3 and ground, with minimal trace length to preserve phase noise and startup reliability. The VXM9-9012-66M6666660 does not include internal capacitors.

What is the maximum ESR for the VXM9-9012-66M6666660, and why does it matter?

The VXM9-9012-66M6666660 has a maximum ESR of 80 Ω for frequencies above 30 MHz. This low ESR ensures reliable oscillation startup and sustained operation with low-power oscillator circuits such as those found in STM32L4 or nRF52-series MCUs. Exceeding this ESR may cause failure to start or intermittent oscillation, making ESR verification essential during schematic review of the VXM9-9012-66M6666660 design-in.

Is the VXM9-9012-66M6666660 compatible with lead-free reflow processes?

Yes, the VXM9-9012-66M6666660 is fully compatible with Pb-free reflow and rated MSL 1, meaning it can be stored indefinitely at ambient conditions and withstand standard JEDEC J-STD-020 profiles-including peak temperatures up to 260 °C for 30 seconds. Its Au/Ni contact pads ensure wetting integrity with SAC305 solder, and the VXM9-9012-66M6666660 requires no pre-baking prior to assembly.

How is the date code marked on the VXM9-9012-66M6666660 package?

The VXM9-9012-66M6666660 uses a three-character date code laser-marked on the top surface: the first character is the year (e.g., '9' = 2019), the second is the month ('A' = Jan, 'B' = Feb, ..., 'L' = Dec), and the third is the manufacturing location code. This marking follows the format defined in the VT-804 specification sheet and applies directly to the VXM9-9012-66M6666660 unit.