NX3225GA-42.000MHZ - 42MHz SMD Crystal 3225 | NDK
MPN: NX3225GA-42.000MHZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.45 | $0.45 |
| 10 | $0.38 | $3.80 |
| 100 | $0.29 | $29.00 |
| 500 | $0.24 | $120.00 |
| 1,000 | $0.19 | $190.00 |
NX3225GA-42.000MHZ Overview
A quartz crystal unit is a passive frequency-control component that exploits the piezoelectric resonance of an AT-cut quartz blank to generate a highly stable reference frequency. Within the system hierarchy, crystal units sit at the base of the clock and timing chain, feeding oscillator circuits in MCUs, RF transceivers, and SoCs, which in turn drive PLLs and clock trees. Unlike integrated oscillators, a crystal unit requires external circuit conditions (load capacitance, negative resistance margin) defined by the host IC.
Key features of the NX3225GA include its ultra-compact and thin 3.2 x 2.5 x 0.75 mm typ. package, excellent environmental characteristics including heat and shock resistance, and stable start-up characteristics even under severe environmental conditions. For the 42 MHz frequency point, the standard specification gives a maximum equivalent series resistance of 50 ohms, per the NDK standard specification table for the 20 to 50 MHz band.
The NX3225GA uses an AT-cut fundamental-mode quartz resonator sealed in a ceramic SMD package with metal lid. NDK manufactures these crystals with advanced photolithographic tuning and thorough quality control, achieving uniform high quality in mass production. The OA/AV (office automation / audiovisual) grade datasheet highlights strong electrical performance for digital clocking, while a separate automotive-grade variant datasheet documents heat, vibration, and shock resistance for in-vehicle use.
Typical applications include 42 MHz clocking for USB, Ethernet PHY, and wireless SoC reference circuits, office automation equipment, and audiovisual products where a compact, low-profile clock source is required.
Design consideration: always verify oscillation margin with the host IC - NDK explicitly recommends checking circuit conditions, load capacitance, and negative resistance before using the crystal, and re-checking when reusing a crystal on a different board.
This page synthesizes verified distributor data, drop-in alternatives, and practical design notes beyond the raw NDK datasheet, with pricing and stock references as of 2026-09-14.
Drop-in alternatives for NX3225GA-42.000MHZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with NX3225GA-42.000MHZ (same form factor and footprint) — differing in Nominal Frequency, Package Dimensions, Frequency Tolerance, Package Type, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NX3225GA-42.0000
✅ Drop-In📋 Reference alternative (not in catalog)
NX3225GA-25.000M-STD-CRG-2
✅ Drop-In✓ In Stock
$0.19 / Unit
View Datasheet →NX3225GA-24.000MHZ
✅ Drop-In✓ In Stock
$0.28 / Unit
View Datasheet →NX3225GA-13.56M-STD-CRG-2
✅ Drop-In✓ In Stock
$0.11 / Unit
View Datasheet →NX3225DA
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
NX3225GA-42.000MHZ Specifications
| Nominal Frequency | 42.000 MHz |
| Series Frequency Range | 9.8 MHz to 50 MHz |
| Overtone Order | Fundamental |
| Equivalent Series Resistance (Max, 20-50 MHz band) | 50 ohm |
| Package Size | 3.2 x 2.5 x 0.75 mm typ. |
| Mounting Type | Surface Mount (SMD) |
| Package Type | Ceramic SMD crystal package (3225) |
| Resonator Type | AT-cut quartz crystal unit (passive) |
| Application Grade | OA / AV; automotive-grade variant available |
| Environmental Features | Heat and shock resistant; stable start-up under severe conditions |
NX3225GA-42.000MHZ ceramic smd crystal package (3225) Pin Configuration Guide
Pin configuration for NX3225GA-42.000MHZ (ceramic smd crystal package (3225) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for NX3225GA-42.000MHZ.
Refer to the datasheet for full pin configuration.
Typical Applications
NX3225GA-42.000MHZ is suitable for 6 applications: MCU / SoC Reference Clock, Ethernet PHY Clocking, Office Automation Equipment, Audiovisual and Consumer Electronics, Automotive Electronics (Automotive-Grade Variant), Wireless and RF Reference Clocking.
MCU / SoC Reference Clock
The NX3225GA-42.000MHZ provides the fundamental 42 MHz reference for microcontrollers and SoCs that multiply it internally via PLLs. Its ultra-thin 3.2 x 2.5 x 0.75 mm typ. package lets it sit directly beside the IC on dense boards, and NDK documents stable start-up even under severe environmental conditions, reducing reset risk at cold boot. Placed in a Pierce oscillator with load capacitors matched to the specified CL, the 50 ohm maximum ESR (20-50 MHz band, NDK standard specification) keeps negative-resistance margin comfortable for reliable oscillation. Always verify oscillation margin on the final PCB, as NDK explicitly recommends, since crystal circuit conditions depend on the host IC.
Recommended
Ethernet PHY Clocking
Many Ethernet PHY and MAC designs use a 25 MHz or 42 MHz-range crystal multiplied to the 125 MHz transmit reference. The NX3225GA-42.000MHZ, with its 50 ohm maximum ESR and AT-cut fundamental stability, supplies a clean reference whose phase noise contributes minimally to RMS jitter. The compact ceramic SMD package suits switch and router layouts where multiple PHYs crowd the PCB, and its heat and shock resistance keeps frequency deviation in check in fan-cooled networking hardware. NDK recommends confirming circuit conditions and negative-resistance margin on the real board before production; jitter performance also depends on the PHY's internal PLL bandwidth.
Recommended
Office Automation Equipment
The OA (office automation) grade of the NX3225GA is explicitly characterized for printers, copiers, scanners, and MFP controller boards, per the NDK 'For OA / AV' datasheet. The 42.000 MHz unit clocks SoC and ASIC cores in these systems, where the ultra-compact 3.2 x 2.5 x 0.75 mm package and excellent heat and shock resistance withstand the thermal cycling and mechanical vibration typical of printing mechanisms. Its 50 ohm maximum ESR (20-50 MHz band) supports robust oscillation with standard MCU amplifiers. Designers should match load capacitors to the ordered spec code and re-validate start-up at temperature extremes, as NDK advises checking circuit conditions whenever a crystal is reused on a new board.
Recommended
Audiovisual and Consumer Electronics
NDK's 'For OA / AV' datasheet highlights the NX3225GA's strong electrical performance for audiovisual products. A 42.000 MHz crystal serves as the master clock for AV SoCs, set-top boxes, and display controllers whose PLLs synthesize audio and video clocks; crystal accuracy and stability directly affect audio sampling-rate correctness and video frame timing. The thin 0.75 mm typ. profile fits slim media hardware, and the ceramic SMD package resists heat generated by nearby power circuitry. As with all passive crystals, verify the oscillation loop margin and load capacitance on the production PCB to guarantee start-up across the full AV product temperature range.
Recommended
Automotive Electronics (Automotive-Grade Variant)
NDK publishes a dedicated 'NX3225GA For Automotive' datasheet describing the same 3.2 x 2.5 x 0.75 mm crystal package engineered for stable start-up under extremely severe environmental conditions, with excellent resistance to heat, vibration, and shock. A 42 MHz automotive-grade unit can clock body-domain MCUs, gateway SoCs, and sensor interfaces. For in-vehicle designs, order the automotive specification code rather than the OA/AV NX3225GA-42.000MHZ, and confirm AEC qualification documents with NDK. Layout should keep the crystal close to the MCU with short traces and guard ground to limit EMI from the 42 MHz fundamental and its harmonics.
Recommended
Wireless and RF Reference Clocking
Short-range wireless SoCs (ZigBee, 2.4 GHz proprietary radios) require a stable crystal reference that is multiplied to RF frequencies; NDK's NX3225GA specification documents appear in reference designs for TI CC253x/CC2540-class SoCs, confirming series suitability for RF clocking. The NX3225GA-42.000MHZ, with 50 ohm maximum ESR and fundamental AT-cut stability, minimizes frequency error contribution to the PLL output, protecting channel accuracy. The compact footprint fits antenna-adjacent layouts, but designers should isolate the crystal from switching supplies and verify load capacitance per the radio's reference design to maintain acceptable spurious and start-up performance across temperature.
Recommended
Recommended Products Summary
Engineering reference data for NX3225GA-42.000MHZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NX3225GA-42.0000 | NX3225GA-25.000M-STD-CRG-2 | NX3225DA |
|---|---|---|---|---|
| Package | 3225 SMD (3.2 x 2.5 x 0.75 mm typ.) | 3225 SMD (3.2 x 2.5 x 0.75 mm typ.) - same | 3225 SMD (3.2 x 2.5 x 0.75 mm typ.) - same | 3225 SMD - same family footprint |
| Brand | NDK | NDK | NDK | NDK |
| Package Height | 0.75 mm typ. | 0.75 mm typ. | 0.75 mm typ. | 0.75 mm typ. |
| Application Grade | OA / AV (automotive variant available) | OA / AV | STD-CRG-2 (standard) | Standard |
Key Differentiators
- Identical-device alternative availability (vs NX3225GA-42.0000)
- Ultra-thin profile within the family (vs NX3225DA)
- Documented RF reference-design usage (vs NX3225GA-13.56M-STD-CRG-2)
Design Notes
Place the NX3225GA-42.000MHZ as close to the host oscillator pins as possible, with load capacitors (C1, C2) grounded through short, wide returns. Load capacitance is CL = (C1 x C2)/(C1 + C2) + Cstray; size C1 and C2 so the sum matches the ordered spec code's CL value. Keep the crystal loop free of high-current or switching traces, and ring the area with ground to suppress radiation of the 42 MHz fundamental and its harmonics.
NDK's application guidance in the NX3225GA specification document stresses that a crystal unit is a passive component and appropriate circuit conditions must be confirmed: check negative-resistance margin (recommend at least 3-5x the crystal ESR, so roughly 150-250 ohms against the 50 ohm max at 42 MHz) on the actual PCB, and re-check whenever the crystal is used on a different board or with a different IC. Failing to verify oscillation margin is the most common cause of field start-up failures.
Keep drive level within the datasheet maximum for the ordered spec code. Excessive drive across the crystal degrades aging and can damage the quartz blank. If the MCU's oscillator amplifier is strong, add a series resistor (typically 100 ohm to 1 kohm, tuned by measurement) between the amplifier output and the crystal to limit drive. Estimated: at 42 MHz with typical 3225 crystals, a few hundred microwatts of drive is the safe region; confirm the exact maximum drive level figure in your spec code document before release.
Compliance Information
Compliance status for this exact spec code is not stated in the verified web data; request declarations from NDK or the distributor. An automotive-grade NX3225GA datasheet exists as a separate variant document.
