NDK NX3225GA-CC 3225 SMD Quartz Crystal Unit | NDK
MPN: NX3225GA-CC ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.3 | $0.30 |
| 10 | $0.27 | $2.70 |
| 100 | $0.24 | $24.00 |
| 500 | $0.22 | $110.00 |
| 1,000 | $0.2 | $200.00 |
NX3225GA-CC Overview
A quartz crystal unit is a passive frequency-control component that exploits the piezoelectric resonance of an AT-cut quartz blank to generate an extremely stable reference frequency. Within the frequency-control hierarchy (crystal unit -> resonator -> oscillator -> clock/timing IC), the bare crystal unit is the most fundamental element: it must be driven by an external oscillator circuit (typically built into an MCU, SoC, or chipset) to produce the actual clock signal. This makes the NX3225GA family suitable wherever an accurate, low-cost reference is required without the power budget of a packaged oscillator.
Key features of the NX3225GA series include ultra-compact and thin construction (height typ. 0.75 mm) that enables dense PCB layouts, excellent environmental characteristics including heat and shock resistance, stable start-up characteristics, and lead-free reflow compatibility meeting RoHS requirements. Equivalent series resistance (ESR) is tightly specified by frequency band: 200 ohm max for 9.8-12 MHz, 100 ohm max for 12-13 MHz, 80 ohm max for 13-20 MHz, and 50 ohm max for 20-50 MHz (STD-CRG-2 grade).
Technically, the AT-cut fundamental-mode resonator offers low phase jitter contribution and minimal sensitivity to supply noise compared with integrated oscillators, since the frequency stability is set by the mechanical resonance of the quartz blank rather than by any semiconductor process.
Typical applications include office automation (OA) equipment, audiovisual (AV) products, MCU/SoC clock references, and automotive-grade designs using the related NX3225GA automotive variant with heat, vibration and shock resistance.
Design consideration: select the load capacitance (e.g., 8 pF variants such as the STDCRG2-16M) to match the MCU oscillator circuit gain margin, and keep the crystal traces short to minimize stray capacitance.
This page synthesizes distributor cross-reference data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for NX3225GA-CC — 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-CC (same form factor and footprint) — differing in Equivalent Series Resistance (ESR), Frequency Tolerance, Nominal Frequency, Frequency Stability, Package Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NX3225GA-25.000M-STD-CRG-2
✅ Drop-In✓ In Stock
$0.19 / Unit
View Datasheet →NX3225GA-25MHZ-STD-CRG-2
✅ Drop-In✓ In Stock
$0.07 / Unit
View Datasheet →NX3225GA-12MHZ-STD-CRG-1
✅ Drop-In✓ In Stock
$0.2007 / Unit
View Datasheet →STDCRG2-16M
✅ Drop-In📋 Reference alternative (not in catalog)
NX3225GA-CC Specifications
| Product Type | Quartz Crystal Unit (AT-cut, fundamental mode) |
| Series | NX3225GA |
| Frequency Range | 9.8 MHz to 50 MHz (fundamental) |
| Frequency Tolerance (+25 C) | +/-20 x 10-6 max (ppm) |
| Frequency Stability (-40 to +85 C) | +/-40 x 10-6 max (ppm) |
| Reference Temperature | +25 C |
| Equivalent Series Resistance (9.8-12 MHz) | 200 ohm max |
| Equivalent Series Resistance (12-13 MHz) | 100 ohm max |
| Equivalent Series Resistance (13-20 MHz) | 80 ohm max |
| Equivalent Series Resistance (20-50 MHz) | 50 ohm max |
| Package Size | 3.2 x 2.5 x 0.75 mm typ. |
| Package Type | 4-SMD, No Lead (ceramic, 3225) |
| Mounting Type | Surface Mount |
| Soldering | Lead-free reflow profile compatible |
| RoHS Status | Compliant |
| Environmental Characteristics | Heat and shock resistant, stable start-up |
NX3225GA-CC Pin Configuration
| Pin 1 | XTAL1 (Crystal Terminal 1) — Resonator terminal 1 - connect to oscillator inverting input |
| Pin 2 | GND (Case) — Grounded case pad (per datasheet package configuration) |
| Pin 3 | XTAL2 (Crystal Terminal 2) — Resonator terminal 2 - connect to oscillator output via load capacitors |
| Pin 4 | GND (Case) — Grounded case pad (per datasheet package configuration) |
Typical Applications
NX3225GA-CC is suitable for 6 applications: MCU / SoC Clock Reference, Office Automation (OA) Equipment, Audiovisual (AV) Equipment, Automotive Clock References, Ethernet and Networking Interfaces, IoT and Battery-Powered Devices.
MCU / SoC Clock Reference
The NX3225GA-CC provides the primary reference frequency for microcontroller and SoC oscillator circuits, where the chip's internal inverter amplifier drives the bare crystal through its XTAL pins. The +/-20 ppm tolerance at +25 C and +/-40 ppm over -40 C to +85 C keep clock error within typical UART, USB, and timer budget requirements, while the frequency-band ESR limits (50-200 ohm max per NDKX03-00006) guarantee reliable start-up when the oscillation margin is at least 5x ESR. The 0.75 mm typ. height and 3.2 x 2.5 mm footprint allow placement close to the MCU, minimizing stray capacitance that would otherwise detune the load. Unlike packaged oscillators, the crystal adds no supply current of its own, making it ideal for battery-powered designs.
Recommended
Office Automation (OA) Equipment
NDK explicitly positions the NX3225GA series for OA (office automation) applications such as printers, copiers, and scanners, citing excellent electrical performance for these products. In these systems the crystal clocks main control MCUs, image-processing SoCs, and communication interfaces, where the ultra-compact 3.2 x 2.5 x 0.75 mm typ. package supports dense controller boards. The series' heat and shock resistance tolerates the thermal cycling and mechanical vibration typical of print mechanisms, and stable start-up characteristics ensure the clock begins reliably after power-on in diverse ambient conditions. Lead-free reflow compatibility per RoHS requirements fits standard SMT assembly used for high-volume office equipment production.
Recommended
Audiovisual (AV) Equipment
For AV (audiovisual) products - set-top boxes, displays, and audio equipment - the NX3225GA series delivers the master clock for audio codecs, video decoders, and HDMI/media SoCs. NDK datasheets highlight excellent electrical performance for AV applications: the AT-cut quartz resonance contributes low phase noise, and the ceramic 4-pad package (two grounded case pads) improves electromagnetic shielding versus 2-pad designs, reducing spurious coupling into sensitive analog audio paths. Frequency accuracy of +/-20 ppm at +25 C keeps sample-rate clocks within tolerance for digital audio interfaces. The 0.75 mm typ. ultra-thin profile suits slim consumer AV enclosures where board-to-chassis clearance is limited.
Recommended
Automotive Clock References
The NX3225GA automotive variant (NDK catalog c_NX3225GA-2_e.pdf) extends the family for vehicle-mounted equipment, offering stable start-up under extremely severe environmental conditions and excellent resistance to heat, vibration, and shock. Applications include body-control modules, infotainment processors, and CAN/LIN communication nodes, where a 3.2 x 2.5 mm crystal clocks the MCU and transceiver chips. The -40 C to +85 C characterization with +/-40 ppm stability covers typical under-dash and engine-bay-adjacent module environments, while the compact ceramic package withstands automotive soldering and vibration profiles. Designers should verify the automotive grade option and AEC-related qualification status for the exact order code with NDK.
Recommended
Ethernet and Networking Interfaces
The NX3225GA family's 25 MHz members (e.g., NX3225GA-25.000M-STD-CRG-2) serve as the reference for Ethernet PHYs, which internally generate the 125 MHz transmit clock from a 25 MHz crystal. The 20-50 MHz band ESR limit of 50 ohm max per NDKX03-00006 ensures robust start-up with typical PHY integrated oscillators, and +/-20 ppm initial tolerance meets the IEEE-class frequency budget when paired with the +/-40 ppm temperature drift within -40 C to +85 C. The grounded case pads of the 4-SMD ceramic package help contain oscillator spurious emissions in dense networking boards. The 3.2 x 2.5 mm footprint fits under PHY chips or near magnetics without consuming premium board area.
Recommended
IoT and Battery-Powered Devices
In smart-home sensors, beacons, and wireless IoT nodes, the NX3225GA-CC clocks the wireless MCU or module while consuming zero quiescent current itself - the crystal is a passive resonator, so system sleep current is governed solely by the MCU. The +/-20 ppm at +25 C accuracy supports Bluetooth Low Energy and sub-GHz radio frequency-error budgets when temperature drift (+/-40 ppm over -40 C to +85 C) is accounted for in the radio calibration plan. The ultra-thin 0.75 mm typ. height suits very slim wearable and sensor enclosures, and the compact 3.2 x 2.5 mm footprint leaves board space for the antenna keep-out and battery, critical constraints in coin-cell IoT designs.
Recommended
Recommended Products Summary
Engineering reference data for NX3225GA-CC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NX3225GA-25.000M-STD-CRG-2 | NX3225GA-12MHZ-STD-CRG-1 | STDCRG2-16M |
|---|---|---|---|---|
| Package | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm typ.) | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) - same | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) - same | 4-SMD, No Lead - same |
| Brand | NDK (NIHON DEMPA KOGYO) | NDK | NDK | NDK |
| Max ESR (respective band) | 50-200 ohm max by band (NDKX03-00006) | 50 ohm max (20-50 MHz band) | 100 ohm max (12-13 MHz band, STD-CRG table) | 80 ohm max |
| Typical Application | OA / AV / general clocking | Ethernet PHY / SoC clocking | MCU clocking | General MCU clocking (catalog part) |
Key Differentiators
- Ultra-compact, ultra-thin construction (vs STDCRG2-16M)
- Frequency-band-optimized ESR limits (vs NX3225GA-12MHZ-STD-CRG-1)
- Automotive-grade variant available in the same footprint (vs NX3225GA-25.000M-STD-CRG-2)
Design Notes
Place the NX3225GA-CC as close as possible to the MCU/SoC XTAL pins with short, symmetrical traces (ideally under 10 mm) to minimize stray capacitance, which directly shifts the load capacitance and therefore the oscillation frequency. Route the crystal traces over a solid ground plane, keep other signals (especially fast switching lines) away from the crystal nets, and surround the area with a guard ground. Connect both grounded case pads (pins 2 and 4) solidly to ground - this provides mechanical stability and shields the resonator. Estimated: each 1 pF of additional stray capacitance on a nominal 8 pF load crystal can shift frequency by tens of ppm, exceeding the +/-20 ppm budget.
Select load capacitors (C1/C2) so that (C1 x C2)/(C1 + C2) + Cstray equals the crystal's specified load capacitance; STD-CRG-2 grade family members are commonly specified at 8 pF-class loads (see STDCRG2-16M as an example). Then verify oscillation margin: the MCU oscillator's negative resistance should be at least 5x the crystal's maximum ESR per the applicable frequency band (200 ohm max for 9.8-12 MHz down to 50 ohm max for 20-50 MHz per NDKX03-00006). Under-margin designs fail to start at temperature extremes. Keep drive level within the crystal's rated limit - excess drive ages the quartz blank and degrades ppm accuracy over time.
Order-code confusion is the most common pitfall with this family: NX3225GA is the series name, and the full ordering string (frequency + specification suffix, e.g., -25.000M-STD-CRG-2) defines the actual part. Before releasing a BOM, confirm the complete code for the -CC suffix against the NDKX03-00006 specification sheet or an NDK FAE, since ESR limits, load capacitance, and tolerance can differ between specification grades. Also note NDK's specification sheet warning: for equipment related to human life or property, the customer is responsible for safety design (redundancy, malfunction prevention) before use.
Compliance Information
RoHS compliant and lead-free reflow compatible per NX3225GA product documentation (LCSC/NK product listings). REACH, halogen-free, and conflict-minerals status not stated in retrieved data. Automotive-grade variant exists in the NX3225GA family (NDK catalog c_NX3225GA-2_e.pdf); AEC-Q100 status for this order code not confirmed.
