NX3225GA-12.000MHZ - 12MHz 8pF SMD Crystal | NDK
N.º de pieza: NX3225GA-12.000MHZ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0.27 | $0,27 |
| 10 | $0.24 | $2,40 |
| 100 | $0.2 | $20,00 |
| 500 | $0.16 | $80,00 |
| 1.000 | $0.13 | $130,00 |
NX3225GA-12.000MHZ Descripción general
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. In the frequency-control hierarchy, crystal units form the resonator tier below crystal oscillators (XO/TCXO/OCXO): a crystal itself does not oscillate, but combined with an inverter or a MCU/SoC on-chip oscillator circuit it sets the clock of virtually every digital and RF system.
Key features of the NX3225GA series include its ultra-thin 0.75 mm profile, excellent heat and shock resistance, stable start-up characteristics, and the broad 9.8 MHz to 50 MHz frequency range covered by the family. For 12 MHz, the NDK standard specification STD-CRG-2 sets the maximum equivalent series resistance (ESR) at 100 ohm, per document NDKX03-00006.
Technically, the NX3225GA uses an AT-cut quartz resonator sealed in a ceramic surface-mount package with metal lid, achieving tight motional parameter control and low aging. Its small footprint allows placement directly beside the MCU or transceiver OSC_IN/OSC_OUT pins, minimizing trace length and parasitic capacitance.
Typical applications include microcontroller clock references (for example TI TM4C123 MCUs, for which the NX3225GA-12 appears in reference designs), Wi-Fi/Bluetooth and USB interface chips, and industrial control boards requiring a robust 12 MHz reference.
Design consideration: verify the oscillator loop with the manufacturer-recommended negative resistance margin and match the load capacitors to the specified 8 pF CL, since crystal units are passive and correct circuit conditions are essential.
This page synthesizes distributor pricing, same-footprint alternatives, and practical design notes not found in the manufacturer datasheet. Pricing shown is as of 2026-09-14 from LCSC and Mouser listings.
Alternativas directas para NX3225GA-12.000MHZ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con NX3225GA-12.000MHZ (mismo factor de forma y huella) — difiere en Frequency Tolerance, Nominal Frequency, Package, Package Size, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
NX3225GA-12.000M-STD-CRG-2
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NX3225GA-12.000M-STD-CRG-1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NX3225GA-12.000M-STD-CRA-1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NX3225GA-12.000MHz-EXS00A-CG06572
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NX3225GA-12MHZ-STD-CRG-2
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NX3225GA-12.000MHZ Especificaciones
| Nominal Frequency | 12 MHz |
| Frequency Tolerance | +/-30 ppm |
| Load Capacitance (CL) | 8 pF |
| Temperatura de funcionamiento | -40C to +85C |
| Equivalent Series Resistance (ESR) Max | 100 ohm (STD-CRG-2, 12 <= f < 13 MHz) |
| Frequency Range of Series | 9.8 MHz to 50 MHz |
| Package Size | 3.2 x 2.5 x 0.75 mm (typ.) |
| Encapsulado | SMD-3225, 4-pad |
| Tipo de montaje | Surface Mount |
| Resonator Type | AT-cut quartz crystal unit |
| Height (max, typ.) | 0.75 mm |
| Características | Ultra compact and thin; heat and shock resistance; stable start-up |
| Estado RoHS | RoHS compliant |
Configuración de pines de NX3225GA-12.000MHZ
| Pin 1 | X1 (XTAL1) — Crystal terminal 1 - connect to oscillator input/inverter input |
| Pin 2 | GND — Mounting/ground pad |
| Pin 3 | X2 (XTAL2) — Crystal terminal 2 - connect to oscillator output/inverter output |
| Pin 4 | GND — Mounting/ground pad |
Aplicaciones típicas
NX3225GA-12.000MHZ es adecuado para 6 aplicacións: Microcontroller Clock Reference, USB and Wired Interface Clocking, Industrial Control and Automation Boards, IoT and Wearable Devices, Wireless Modules and RF SoC Boards, Automotive Body and Comfort Electronics.
Microcontroller Clock Reference
The NX3225GA-12.000MHZ is a natural external crystal for MCU OSC_IN/OSC_OUT circuits, a role confirmed by its appearance in TI TM4C123 series reference material under the same 12 MHz ordering code. Its 8 pF load capacitance matches typical on-chip Pierce oscillator designs, and the 100 ohm maximum ESR at 12 MHz (STD-CRG-2) provides comfortable negative-resistance margin against the few-hundred-ohm to k-ohm range of typical MCU oscillators. The 0.75 mm profile lets the crystal sit within a few millimeters of the MCU pins, shortening the loop and reducing stray capacitance. NDK highlights stable start-up characteristics, valuable for brown-out and low-temperature boot scenarios.
Recomendado
USB and Wired Interface Clocking
A 12 MHz reference is the classic seed clock for USB full-speed and many wired interface PHYs, where internal PLLs multiply it to 48 MHz or higher. The NX3225GA's +/-30 ppm tolerance over -40C to +85C keeps the multiplied clock within data-eye budgets, and the low 0.75 mm profile suits dongles, hubs, and compact bridge boards. Because the crystal is passive, placing it with short, guarded traces and loading capacitors matched to 8 pF CL minimizes jitter contribution; NDK's datasheet explicitly instructs verifying circuit margin and confirming the output frequency on the actual board before production.
Recomendado
Industrial Control and Automation Boards
In factory automation and PLC-style controllers, clock sources must survive vibration, thermal cycling, and shock. The NX3225GA series provides excellent environment-resistant performance including heat and shock resistance per NDK product documentation, and for the most severe conditions the STD-CRA automotive grade of the same package is available. The -40C to +85C range and 100 ohm ESR ceiling at 12 MHz ensure oscillator start-up on cold cabinets and margin for MCU loops driving long trace stubs. The metal-lid ceramic SMD package also reflows reliably in standard lead-free profiles, supporting high-volume industrial assembly.
Recomendado
IoT and Wearable Devices
Wearables and battery-powered IoT nodes benefit directly from the NX3225GA's ultra-compact 3.2 x 2.5 x 0.75 mm footprint, one of the thinnest in its class, enabling placement under shields or beside coin cells. A 12 MHz crystal seeds the MCU and radio PLLs for BLE/802.15.4 stacks; the +/-30 ppm grade is generally adequate because protocol timing correction is handled in the stack. Designers should size load capacitors for the 8 pF CL and confirm drive level to keep quartz power within spec, preserving long-term frequency accuracy and low aging in always-on applications such as sensor beacons and smart tags.
Recomendado
Wireless Modules and RF SoC Boards
Many RF SoCs and Wi-Fi/BT modules specify a 12 MHz, 8 pF external crystal feeding the on-chip synthesizer. The NX3225GA's tight ESR control (100 ohm max at 12 MHz under STD-CRG-2) supports reliable oscillation start-up with RF SoCs whose transconductance budgets are modest. NDK's mass-production quality discipline yields consistent motional parameters lot to lot, important because RF PLL lock range and phase noise depend on crystal Q and load accuracy. Layout-wise, keep the crystal loop away from antenna feeds and switching regulators; NDK recommends checking circuit conditions whenever reusing a crystal design on a new board.
Recomendado
Automotive Body and Comfort Electronics
For automotive subsystems such as body control modules, tire-pressure sensors, and comfort ECUs, NDK offers the NX3225GA in the STD-CRA automotive specification with the same 3.2 x 2.5 x 0.75 mm footprint. NDK documentation cites stable start-up under extremely severe environmental conditions and resistance to heat, vibration, and shock - the dominant failure drivers for crystals near engines, doors, and wheels. The 12 MHz value serves as the master clock for MCU and LIN/CAN transceiver timing via PLL multiplication. Using the identical footprint across consumer and automotive builds lets one PCB design serve multiple vehicle programs.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para NX3225GA-12.000MHZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | NX3225GA-12.000M-STD-CRG-2 | NX3225GA-12.000M-STD-CRG-1 | NX3225GA-12.000M-STD-CRA-1 |
|---|---|---|---|---|
| Package | SMD-3225 (3.2 x 2.5 x 0.75 mm), 4-pad | SMD-3225 - same | SMD-3225 - same | SMD-3225 - same |
| Brand | NDK (Nihon Dempa Kogyo) | NDK | NDK | NDK |
| Nominal Frequency | 12 MHz | 12 MHz | 12 MHz | 12 MHz |
| Environment Rating | Industrial/consumer standard grade | Standard grade | Standard grade | Automotive: heat, vibration, shock resistant |
Diferenciadores clave
- Ultra-thin 0.75 mm profile (frente a Larger 5032 / 49S 12 MHz crystals)
- Automotive-grade sibling on identical footprint (frente a NX3225GA-12.000M-STD-CRA-1)
- Documented, frequency-banded ESR limits (frente a Generic unbranded 3225 crystals)
Notas de diseño
Place the crystal within 3-5 mm of the MCU/SoC oscillator pins and keep the X1/X2 traces short, symmetrical, and guarded by ground. Route the loop away from switching regulators, antenna feeds, and high-speed clocks to avoid injection locking and phase-noise degradation. NDK's own guidance in NDKX03-00006 states that a crystal unit is a passive component and appropriate circuit conditions must be confirmed on the actual board - re-verify whenever the crystal is used on a new PCB.
Size load capacitors from the specified 8 pF CL: CL = (C1 x C2)/(C1 + C2) + Cstray. With roughly 2-3 pF of stray capacitance, 12-15 pF capacitors are a typical starting point; fine-tune the frequency on a sample build if ppm accuracy matters. Also verify negative-resistance margin per NDK's recommended method (target | -R | at least 5x the 100 ohm maximum ESR at 12 MHz) to guarantee start-up at -40C and at end-of-life ESR.
Do not drive the crystal beyond its specified drive level - excessive quartz power accelerates aging and can shift frequency beyond the +/-30 ppm tolerance; add a series resistor (typically 100 ohm to 1 kohm at 12 MHz) if drive level measurement exceeds the limit. Estimated: a 100 ohm series resistor with typical MCU oscillator impedance reduces crystal current proportionally, but the value should be confirmed by measurement. Finally, confirm the exact NDK spec code (STD-CRG vs CRA) on your PO - specifications differ by ordering suffix.
Información de cumplimiento
RoHS compliance stated in LCSC listing for NX3225GA-12.000MHz-EXS00A-CG06572. AEC-Q100 not applicable (passive component); automotive variants follow NDK's automotive STD-CRA specification. REACH, halogen-free, and conflict-minerals status not stated in provided data.