Crystals & Resonators
Products (13)
NDK NX3225GA-CC 3225 SMD Quartz Crystal Unit | NDK
The NDK NX3225GA-CC is a compact surface-mount quartz crystal unit from NIHON DEMPA KOGYO (NDK), delivered in an ultra-thin 3.2 x 2.5 x 0.75 mm typ. 4-pad SMD (no-lead, 3225) ceramic package. Frequency tolerance is +/-20 x 10-6 max at +25 C and +/-40 x 10-6 max over -40 C to +85 C, supporting standard clock references from 9.8 MHz up to 50 MHz fundamental mode. 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.
NX3225GA-12.000MHZ - 12MHz 8pF SMD Crystal | NDK
The NDK NX3225GA-12.000MHZ is a 12 MHz quartz crystal unit in an ultra-compact 3.2 x 2.5 x 0.75 mm SMD-3225 4-pad surface-mount package, specified with an 8 pF load capacitance, +/-30 ppm frequency tolerance, and a -40C to +85C operating temperature range. 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.
NX3225GA-12MHZ-STD-CRG-1 - 12MHz 8pF SMD3225 Crystal | NDK
The NDK NX3225GA-12MHZ-STD-CRG-1 is a 12 MHz quartz crystal unit in a compact SMD3225-4P surface-mount package measuring 3.2 x 2.5 x 0.75 mm typical, with a load capacitance of 8 pF, a frequency tolerance of ±20 ppm, and an equivalent series resistance (ESR) of 100 ohm maximum. A quartz crystal unit is a passive frequency-control component that uses the mechanical resonance of a vibrating quartz wafer to generate a highly stable reference frequency. Within the electronics hierarchy, it sits at the foundation of the clock and timing subsystem: oscillator circuits (Pierce, Colpitts) built around a crystal feed MCU, CPU, PLL, and RF synthesizer reference inputs, making the crystal the accuracy anchor of the entire system timing chain. Key features of the NX3225GA series include the ultra-compact and thin 3.2 x 2.5 x 0.75 mm typ. footprint that saves board area in space-constrained designs, excellent environmental resistance including heat and shock resistance, and stable electrical performance over a -10 C to +70 C operating range. The ±20 ppm calibration tolerance and ±30 ppm class aging specification support typical MCU and USB reference requirements when combined with correct load-capacitor selection. Technically, the NX3225GA uses an AT-cut quartz element with tungsten terminal metallization (Au plating over Ni pre-plating), delivered in a hermetically sealed ceramic SMD package with four pads (two resonator terminals plus two ground pads) that improves parasitic isolation and reflow reliability. The 8 pF load capacitance keeps external capacitors small, and the 100 ohm ESR ceiling ensures reliable oscillation start-up with most standard MCUs. Typical applications include microcontroller clock references for office automation (OA) and audiovisual (AV) equipment, USB and UART communication timing, consumer IoT nodes, and general embedded systems requiring a 12 MHz fundamental reference. Design consideration: match the crystal to the oscillator transconductance and select external load capacitors so that CL(external) equals the 8 pF rated load; incorrect loading is the most common cause of frequency offset in crystal designs. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
NX3225GA-13.56M-STD-CRG-2 13.56MHz Crystal 8pF SMD | NDK
The NDK NX3225GA-13.56M-STD-CRG-2 is a 13.56 MHz quartz crystal unit with 8 pF load capacitance, ±20 ppm frequency tolerance, and ±30 ppm frequency stability over the operating range, housed in a compact 4-pad SMD, no-lead package measuring 3.2 x 2.5 x 0.75 mm. A MHz-band crystal unit is a passive frequency-control component that exploits the piezoelectric resonance of a precisely cut quartz blank to provide a stable, low-cost frequency reference. In the system hierarchy of frequency-control devices, the crystal unit sits below the packaged oscillator module (XO/TCXO/OCXO): the crystal itself generates no signal and must be paired with an inverter or MCU oscillator circuit, trading a small amount of board design effort for superior power efficiency, lower cost, and excellent phase-noise characteristics compared with resonator alternatives such as ceramics. Key features of the NX3225GA series include its compact 3225 surface-mount footprint suitable for high-density layouts, fundamental-mode operation at 13.56 MHz which simplifies the oscillator circuit and improves startup reliability, an equivalent series resistance (ESR) of 80 ohms that guarantees startup with typical MCU and RF inverter gains, and an extended operating temperature range of -40C to +85C for industrial environments. NDK's established quartz processing yields tight batch-to-batch consistency. Technically, the -STD-CRG-2 suffix identifies NDK's standard specification code with the CRG-2 specification number for this frequency band, and the device operates in fundamental mode rather than third overtone, avoiding the need for external overtone-suppression networks. The 8 pF load capacitance requires designer-side matching with two shunt capacitors to pull the resonant frequency onto target. Typical applications include 13.56 MHz RFID and NFC readers, contactless smart-card systems operating under the ISO 14443-type carrier frequency, wireless charging and industrial proximity sensing, and clocking of MCUs where a 13.56 MHz reference is convenient for frequency-division schemes. When designing, verify that the target inverter's transconductance comfortably exceeds the startup margin implied by the 80 ohm ESR, and compute the two external load capacitors from CL = (C1 x C2)/(C1 + C2) + Cstray to hit the 8 pF load condition. This page synthesizes distributor pricing, same-family drop-in alternates, and practical design notes not found in the manufacturer datasheet alone.
NX3225GA-14.7456M - 14.7456MHz 8pF SMD Crystal | NDK
The NDK (Nihon Dempa Kogyo) NX3225GA-14.7456M is a 14.7456 MHz quartz crystal unit in a compact 4-SMD, no-lead surface-mount package measuring 3.2 x 2.5 x 0.75 mm (typical), specified at an 8 pF load capacitance with 80 ohms equivalent series resistance (ESR) operating in fundamental mode. A crystal unit is a passive frequency-control component that uses the mechanical resonance of a precisely cut quartz blank to generate a stable reference frequency. Within the frequency-control hierarchy, crystals sit above raw resonators in accuracy and below temperature-compensated (TCXO) and oven-controlled (OCXO) oscillators; a crystal requires an oscillator circuit (often inside an MCU, SoC, or transceiver) to oscillate. The 14.7456 MHz value is a common audio-rate multiple, making this crystal popular in audio and A/V clocking chains. Key features of the NX3225GA series include compact and thin construction (typ. 3.2 x 2.5 x 0.75 mm), excellent heat and shock resistance, and strong electrical performance suited to OA (office automation) and AV (audiovisual) equipment. The -STD-CRG suffix variants specify 20 ppm frequency tolerance, 30 ppm stability over -40C to +85C, and lead-free reflow-compatible termination. The fundamental-mode AT-cut design minimizes spurious modes, and the low-profile ceramic package supports automated high-volume surface-mount assembly. The 80 ohm ESR at 14.7456 MHz provides adequate oscillation margin for typical Pierce oscillator circuits in microcontrollers and audio codecs. Typical applications include audio interface clocking (14.7456 MHz is a convenient audio clock multiple), USB-audio and DSP systems, set-top boxes, OA equipment, and general-purpose MCU reference clocks where miniaturization matters. When designing the layout, keep load capacitors close to the crystal pads and match the total load capacitance to the specified 8 pF; excessive stray capacitance pulls the frequency lower than tolerance. This page synthesizes distributor pricing, availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
NX3225GA-20MHZ-STD-CRA-1 - 20MHz AEC-Q200 Crystal | NDK
The NDK NX3225GA-20MHZ-STD-CRA-1 is an AEC-Q200 qualified 20 MHz surface-mount quartz crystal unit in a compact 3.2 x 2.5 x 0.75 mm SMD3225-4P package, specified with 8 pF load capacitance, 100 ohms maximum ESR, -40C to +150C operating temperature range, and +/-50 ppm frequency tolerance per the STD-CRA-1 specification. A crystal unit is a passive frequency-control component that uses the mechanical resonance of a vibrating quartz blank to generate a highly stable reference frequency. Within the signal-chain hierarchy, it sits at the foundation of clock generation: the crystal feeds the oscillator circuit inside a MCU, SoC, CAN transceiver, or RF IC, which amplifies and shapes the oscillation into a logic clock. Compared with a MEMS or crystal oscillator (XO), a bare crystal offers the lowest cost and smallest BOM footprint but requires the host IC to provide the inverter, load capacitors, and biasing network. Key features of the NX3225GA series include automotive-grade qualification (AEC-Q200), an extended -40C to +150C operating range that exceeds standard -40C to +85C industrial crystals, excellent heat, vibration and shock resistance, and stable start-up characteristics even under extremely severe environmental conditions, according to the NDK NX3225GA datasheet. Technically, the part uses an AT-cut quartz resonator mounted in a ceramic surface-mount package with four pads (two functional terminals plus two ground pads for mechanical stability and symmetry). The 8 pF load capacitance requires two appropriate load capacitors (typically 12-18 pF, calculated from CL = (C1 x C2)/(C1 + C2) + Cstray) for accurate 20 MHz output. The 100 ohms ESR rating ensures reliable start-up with most common MCU oscillator circuits. Typical applications include automotive body control modules, engine bay ECUs exposed to high ambient temperatures, industrial motor controllers, and CAN/LIN network nodes where a 20 MHz reference must survive -40C to +150C environments. Design consideration: verify the negative resistance margin of your oscillator loop (recommended -5x ESR or better) at the temperature extremes; the 100 ohms ESR spec is at the STD-CRA-1 drive level. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
NX3225GA-20MHZ-STD-CRG-2 - 20MHz 3225 SMD Crystal | NDK
The NDK NX3225GA-20MHZ-STD-CRG-2 (also ordered as NX3225GA-20.000M-STD-CRG-2) is a 20 MHz quartz crystal unit with an 8 pF load capacitance and +/-30 ppm frequency tolerance over -40C to +85C, supplied in an ultra-compact surface-mount SMD3225-4P package measuring just 3.2 x 2.5 x 0.75 mm. A quartz crystal unit is a passive frequency-control component that uses the piezoelectric resonance of an AT-cut quartz blank to generate a highly stable reference frequency. Within the system hierarchy, it sits at the base of every clock chain: the crystal feeds the oscillator circuit inside a microcontroller, SoC, or real-time clock, which in turn clocks the digital system. Crystals are preferred over ceramic resonators and silicon oscillators where frequency accuracy and low phase jitter matter, because the quartz resonator's Q is orders of magnitude higher. Key features of the NX3225GA series include its compact and thin 3.2 x 2.5 x 0.75 mm typ. footprint suited to size-constrained boards, excellent environmental characteristics including heat and shock resistance, and excellent electrical performance for OA (office automation) and AV (audiovisual) applications, according to the NDK NX3225GA datasheet. The STD-CRG-2 specification number covers the standard 9.8 to 50 MHz frequency range with -40C to +85C operation. Technically, the NX3225GA is an AT-cut fundamental-mode crystal. The 8 pF rated load capacitance means the oscillator circuit must present approximately 8 pF of effective load (including PCB parasitics) for the crystal to oscillate exactly at 20 MHz; typical designs use two shunt capacitors calculated from the load capacitance equation. Note that the frequency tolerance of +/-30 ppm applies across the operating temperature range for this specification number. Typical applications include microcontroller clock references for industrial and office-automation equipment, audio/video SoC reference clocks, USB and network-adjacent MCU systems, and IoT node boards where the 3225 footprint is standard. Design consideration: always verify the negative resistance margin of the oscillator loop (at least 5x the crystal ESR) and keep crystal traces short and guarded by ground to avoid stray capacitance shifts. This page synthesizes distributor pricing, same-footprint alternatives, and practical design notes not found in the manufacturer datasheet.
NX3225GA-24.000MHZ - 24MHz SMD Crystal 3225 | NDK
The NDK (Nihon Dempa Kogyo) NX3225GA-24.000MHZ is a 24 MHz fundamental-mode quartz crystal unit in an ultra-compact 3.2 x 2.5 x 0.75 mm surface-mount ceramic package (3225 footprint, 4-pad SMD, no lead). It is a passive resonator that requires an external oscillator inverter or MCU on-chip oscillator circuit to generate the clock. A quartz crystal unit is an electromechanical resonator cut from synthetic quartz that exhibits extremely stable piezoelectric resonance. In the system hierarchy, it sits at the base of frequency-control devices: crystal unit -> crystal oscillator (XO) -> clock generator -> timing IC. Crystals define carrier frequencies, baud rates, and MCU clocks in virtually every digital product, where frequency stability directly affects communication accuracy and timing margin. Key features of the NX3225GA series include its ultra-compact and thin profile (0.75 mm typical height), excellent environmental characteristics including heat and shock resistance, and excellent electrical performance for OA (office automation) and AV (audio visual) equipment. For the 20 MHz to 50 MHz range, NDK specifies a maximum equivalent series resistance (ESR) of 50 ohms under the STD-CRG-2 standard spec, which ensures reliable oscillation start-up with typical MCU Pierce oscillator circuits. The 24 MHz frequency is a popular choice for USB full-speed and other embedded systems, since 24 MHz divides evenly to the 12 MHz and 48 MHz clocks required by many USB and microcontroller peripherals. The crystal is driven in parallel (anti-resonant) mode with two external loading capacitors. Typical applications include microcontroller clock sources, USB interfaces, set-top boxes, monitors, LCD TVs, network interface cards, and small consumer OA/AV equipment where board height is constrained. Design consideration: because a crystal unit is a passive component, NDK explicitly recommends verifying circuit conditions - negative resistance margin, load capacitance, and drive level - on the actual PCB before mass production. This page synthesizes distributor pricing, same-family drop-in frequency variants, and practical design notes not found in the manufacturer datasheet alone.
NX3225GA-25.000M-STD-CRG-2 - 25MHz 8pF SMD Crystal | NDK
The NDK NX3225GA-25.000M-STD-CRG-2 is a 25 MHz quartz crystal unit with +/-20 ppm frequency tolerance, +/-30 ppm frequency stability over -40C to +85C, 8 pF load capacitance and 50 ohm maximum ESR, housed in a compact 3.2 x 2.5 x 0.75 mm 4-pad surface-mount package. A crystal unit is a passive frequency-control component that uses the mechanical resonance of a quartz blank to generate a highly stable reference frequency. Within the timing-signal hierarchy, the crystal sits at the base of every clock chain: crystal unit -> Pierce oscillator circuit -> MCU/PLL system clock -> full digital system. Unlike crystal oscillators (XO/TCXO), a bare crystal requires the oscillator circuit integrated in the host MCU or chipset to operate. Key features of the NX3225GA series include an ultra-compact and thin 0.75 mm profile suited to dense layouts, excellent heat and shock resistance for harsh environments, and fundamental-mode operation at 25 MHz. The 8 pF load capacitance allows small, inexpensive loading capacitors, and the 50 ohm ESR supports reliable oscillation start-up with most MCU on-chip inverters. The device uses an AT-cut fundamental-mode quartz resonator with a hermetically sealed ceramic SMD package. NDK manufactures and supplies these crystals with advanced technology and thorough quality control, and this suffix (-CRG-2) is specified for automotive-relevant applications per the series ordering code. Typical applications include microcontroller clock references for automotive body and powertrain ECUs, CAN/LIN network nodes, industrial control boards, and AV/office-automation equipment where a 25 MHz reference feeds USB, Ethernet PHYs, or PLL synthesizers. When designing the Pierce circuit, match the external loading capacitors so that their series combination equals 8 pF (typically two 15 pF capacitors minus stray capacitance), and verify negative resistance margin of at least 5x ESR for reliable start-up. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
NX3225GA-25MHZ-STD-CRG-2 - 25MHz 8pF SMD Crystal | NDK
The NDK NX3225GA-25MHZ-STD-CRG-2 is a 25 MHz surface-mount quartz crystal unit with a frequency tolerance of plus or minus 20 ppm, a load capacitance of 8 pF, and a maximum equivalent series resistance (ESR) of 50 ohms, housed in a compact 3.2 x 2.5 x 0.75 mm 4-pad SMD-3225 no-lead package. 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 timing-signal hierarchy, the crystal sits below the crystal oscillator (XO) and the oscillator IC: it requires an external oscillator circuit (typically built into a microcontroller or PLL) to oscillate, but offers the lowest cost and lowest power path to a precision clock. Crystals are foundational elements of every digital system's clock tree. Key features of the NX3225GA include its ultra-compact and thin 3.2 x 2.5 x 0.75 mm outline, excellent heat and shock resistance, and stable start-up characteristics across an operating temperature range of -40 C to +85 C. The nominal frequency range of the STD-CRG-2 specification spans 9.8 MHz to 50 MHz, with the 20-50 MHz range specified at 50 ohms maximum ESR. Pins 2 and 4 are not connected and may be tied to ground for improved stability. Technically, the NX3225GA uses an AT-cut quartz resonator optimized for fundamental-mode operation in the HF band. NDK manufactures the series with proprietary processing that yields uniform quality and high reliability, as reflected in the -40 C to +85 C industrial-grade temperature rating and vibration/shock resistance noted in the manufacturer datasheet. Typical applications include office automation (OA) equipment such as printers and scanners, audiovisual (AV) equipment, microcontroller clock references in consumer electronics, USB and Ethernet physical-layer timing, and control boards in industrial equipment where a compact, low-cost 25 MHz reference is required. Design consideration: match the crystal's 8 pF rated load capacitance by selecting external load capacitors CL of roughly (CL - Cstray x 2) per leg, and verify negative resistance margin of at least 5x ESR in the oscillator loop to guarantee start-up across temperature. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in a single manufacturer datasheet, providing consolidated information-gain for engineers evaluating 25 MHz SMD crystals.
NX3225GA-32.4576MHZ - 32.4576MHz SMD Crystal | NDK
The NDK NX3225GA-32.4576MHZ is a 32.4576 MHz quartz crystal unit in a compact surface-mount 3225 package measuring 3.2 x 2.5 x 0.75 mm (typical), with a standard frequency tolerance of plus/minus 20 x 10-6 and frequency-temperature characteristics of plus/minus 20 x 10-6 over 0 to +70 C. A quartz crystal unit is a passive frequency-control component that uses the mechanical resonance of a vibrating quartz die to generate a highly stable reference frequency. Within the timing-component hierarchy - crystal unit -> resonator -> frequency control device -> passive component - crystals form the heart of oscillator circuits, setting the clock for microcontrollers, transceivers, and audio/video systems where a stable reference directly determines system timing accuracy. Key features of the NX3225GA include its ultra-compact and thin 3.2 x 2.5 x 0.75 mm outline, excellent heat and shock resistance, and electrical performance optimized for OA (office automation) and AV (audiovisual) applications. According to the NDK NX3225GA datasheet (document NDKX03-00006), equivalent series resistance depends on the frequency band: 200 ohms max for 9.8 MHz to below 12 MHz, 100 ohms max for 12 to below 13 MHz, 80 ohms max for 13 to below 20 MHz, and 50 ohms max for 20 to 50 MHz, confirming that the 32.4576 MHz part operates in the low-ESR fundamental region. Technically, the NX3225GA is an AT-cut fundamental-mode crystal tuned for parallel resonance, supplied with a standard load-capacitance ordering code (STD-CRG family). Its tight plus/minus 20 ppm calibration plus plus/minus 20 ppm temperature drift yields roughly plus/minus 40 ppm total stability over the commercial temperature range, sufficient for USB, audio master clocks, and general-purpose MCU clocking. Typical applications include 32.4576 MHz audio and video master clocks (a frequency that divides cleanly to standard audio sample rates), office-automation equipment, consumer AV gear, and embedded MCU clock sources requiring miniaturization. Design consideration: place the crystal close to the oscillator pins with short traces and follow the MCU load-capacitance recommendation to pull the frequency into tolerance. This page adds distributor pricing, drop-in NX3225GA-family alternatives, design notes, and an FAQ not found in the manufacturer datasheet alone.
NX3225GA-42.000MHZ - 42MHz SMD Crystal 3225 | NDK
The NDK NX3225GA-42.000MHZ is a 42.000 MHz fundamental-mode quartz crystal unit in an ultra-compact 3.2 x 2.5 x 0.75 mm surface-mount ceramic package, drawn from NDK's NX3225GA series covering nominal frequencies from 9.8 MHz to 50 MHz. 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.
NX3225GA-55.46667HMZ - 55.46667MHz SMD Crystal | NDK | OA/AV Timing
The NDK NX3225GA-55.46667HMZ is a compact surface-mount quartz crystal unit oscillating at 55.46667 MHz in an ultra-thin 3.2 x 2.5 x 0.75 mm ceramic SMD package (3225 footprint, 2-pad). As part of NDK's NX3225GA Standard series for office automation (OA) and audiovisual (AV) equipment, it delivers high-frequency stability in one of the smallest footprints in its class. A quartz crystal unit is a passive frequency-control device that uses the piezoelectric resonance of an AT-cut quartz blank to generate a highly stable reference frequency. Within the timing-device hierarchy, it sits at the component level: crystal unit -> resonator -> frequency-control component -> system clock source, feeding oscillators, PLLs, MCUs, SoCs, and networking PHYs that require a precise clock reference. Key features include the ultra-compact and thin 3.2 x 2.5 x 0.75 mm (typ.) seam-welded ceramic package, excellent environmental resistance including heat and shock resistance, and excellent electrical performance optimized for OA and AV related equipment. The seam-sealed construction protects the resonating quartz element from moisture and contaminants, supporting reflow soldering processes. Technically, the NX3225GA family covers a fundamental/ overtone frequency range in the tens of MHz; per the NDK standard specification (STD-CRG-2), equivalent series resistance limits scale with frequency, for example 50 ohms max in the 20 to 50 MHz band. The 55.46667 MHz calibration frequency is trimmed to tight tolerance at the factory, and the precise 55.46667 MHz value is commonly used for high-speed serial and video clock synthesis. Typical applications include LAN and networking equipment, digital video and set-top box clock references, OA equipment such as printers and scanners, and AV amplifiers or display timing circuits where board space is constrained. Design consideration: PCB layout must respect the crystal's load capacitance specification; stray board capacitance shifts the operating frequency, so keep traces short and place ground guarding around the crystal pads. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.