Microchip Technology VXM7-1361-49M1520000

Overview

VXM7-1361-49M1520000 from Vectron is a 3.2 × 2.5 mm surface-mount fundamental-mode AT-cut quartz crystal operating at 49.152 MHz with ±10 ppm frequency stability over –40 °C to +85 °C, 12 pF load capacitance, and 40 Ω typical ESR - used in precision timing for industrial Ethernet PHYs and USB 3.0 reference clocks.

For engineers reviewing the VXM7-1361-49M1520000 datasheet, VXM7-1361-49M1520000 pinout, VXM7-1361-49M1520000 application, or VXM7-1361-49M1520000 equivalent, key selection criteria include temperature range compliance (–40 °C to +85 °C), tight ±10 ppm stability, low 40 Ω ESR at 49.152 MHz, and RoHS-compliant gold-over-nickel termination compatible with Pb-free reflow.

Technical Context

This crystal uses an AT-cut quartz blank vibrating in fundamental mode, optimized for stable oscillation at 49.152 MHz under industrial temperature extremes. Its mechanical design meets MIL-STD-883 shock/vibration specs and MSL 1 moisture sensitivity rating.

The device requires external oscillator circuitry (e.g., Pierce configuration) and specifies drive level ≤100 µW to prevent activity dips or aging acceleration. Load capacitance is fixed at 12 pF per ordering code "1361", defining required external capacitive loading for nominal frequency accuracy.

Key Specifications

Pinout & Package

Package: 3.2 mm × 2.5 mm × 0.7 mm ceramic SMD four-pad package (bottom view); gold-over-nickel contact pads; MSL 1; compatible with SnPb and Pb-free reflow per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ABM8-49.152MHZ-B2-T and FA-238V-49.152000, the VXM7-1361-49M1520000 uniquely combines 49.152 MHz fundamental operation, 12 pF load, 40 Ω ESR, and –40 °C to +85 °C stability in a production-proven 3.2 × 2.5 mm package - making it the only validated option for USB 3.0 and industrial Ethernet PHY timing without derating or layout change.

Availability

VXM7-1361-49M1520000 is available at Aetrix Electronics and suitable for industrial Ethernet PHY timing, USB 3.0 reference clocking, medical imaging data acquisition, and programmable logic controller real-time clock applications requiring stable component supply across extended temperature ranges.

Supply support for VXM7-1361-49M1520000 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 high-reliability frequency control products for industrial, automotive, and communications markets.

The VXM7 series delivers precision, low-profile SMD crystals targeting applications demanding tight stability, low ESR, and full industrial temperature operation - specifically engineered for Ethernet, USB, and real-time control timing.

FAQ

What is the load capacitance specified for VXM7-1361-49M1520000?

The VXM7-1361-49M1520000 is specified for 12 pF load capacitance, as indicated by the "6" in position 5 of the ordering code "1361". This value determines the required external capacitive loading in the oscillator circuit - typically implemented using two identical capacitors from each crystal terminal to ground, whose series combination equals 12 pF (e.g., two 24 pF caps). Using incorrect load capacitance will shift the actual operating frequency away from 49.152 MHz.

Does VXM7-1361-49M1520000 support fundamental-mode operation at 49.152 MHz?

Yes, VXM7-1361-49M1520000 operates in fundamental mode at 49.152 MHz using an AT-cut quartz blank. The datasheet confirms fundamental-mode capability up to 60 MHz, and the ESR table explicitly lists 40 Ω for the 30.001–60.000 MHz band - confirming suitability for direct 49.152 MHz use without overtone circuitry or filtering.

What is the maximum allowable drive level for VXM7-1361-49M1520000?

The maximum recommended drive level for VXM7-1361-49M1520000 is 100 µW, as specified in Table 1 of the datasheet. Exceeding this level risks accelerated aging, activity dips, or crystal fracture. Oscillator circuits must be designed to limit power dissipation in the crystal - typically achieved via feedback resistor selection and inverter bias control - ensuring long-term frequency stability and reliability.

Is VXM7-1361-49M1520000 compliant with RoHS and Pb-free assembly standards?

Yes, VXM7-1361-49M1520000 is RoHS-compliant and fully compatible with lead-free assembly. Its gold-over-nickel contact pads meet JEDEC J-STD-020 reflow requirements, including peak temperature ≤260 °C and time above 217 °C between 60–150 seconds. The device carries MSL 1 rating, meaning it can be stored indefinitely before assembly without baking.

What does the "1361" suffix in VXM7-1361-49M1520000 indicate?

The "1361" suffix in VXM7-1361-49M1520000 decodes as follows: "1" = fundamental mode, "3" = –40 °C to +85 °C operating temperature range (E grade), "6" = 12 pF load capacitance, "1" = standard packaging (TR tape-and-reel). This ordering code precisely defines the electrical and mechanical configuration of the VXM7-1361-49M1520000 unit shipped.