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製品 (23)
ABM3B-24.000MHZ-B2-T - 24MHz 18pF 50Ω SMD Crystal | Abracon
The Abracon ABM3B-24.000MHZ-B2-T is a 24 MHz quartz crystal resonator packaged in a 5.0 mm x 3.2 mm x 1.1 mm four-pad surface-mount ceramic SMD housing, designed for reflow soldering. Per the ABM3B datasheet, the device delivers ±20 ppm frequency tolerance, ±50 ppm frequency stability across the -40 °C to +85 °C operating range, 18 pF load capacitance, and 50 Ω equivalent series resistance (ESR). It is hermetically sealed with a glass seal (Pb in glass) to ensure high precision and long-term reliability in industrial and commercial environments. A quartz crystal is a passive electromechanical resonator that exploits the piezoelectric effect of an AT-cut quartz blank to produce a stable reference frequency. Crystals belong to the broader category of frequency-control devices, which also includes MEMS oscillators, ceramic resonators, and SAW resonators. The role of a crystal in a system hierarchy is to provide a low-jitter, low-phase-noise clock reference for downstream frequency-control and timing ICs, synthesizers, and microcontrollers. The ABM3B-24.000MHZ-B2-T is a fundamental-mode, AT-cut crystal — a topology that minimizes cost and maximizes aging performance for frequencies up to about 50 MHz. Key features that distinguish this part include its compact 5.0 x 3.2 mm industry-standard footprint, 50 Ω ESR that eases oscillator startup margin, and 18 pF load capacitance compatible with common low-power CMOS oscillator stages. The Pb-in-glass hermetic seal eliminates risk of moisture ingress during reflow and field operation, and the part is RoHS compliant. Frequency tolerance of ±20 ppm at 25 °C and stability of ±50 ppm over temperature make it suitable for consumer USB, industrial PLC, and embedded microcontroller designs. Technically, the ABM3B uses a strip-fundamental AT-cut quartz blank operating at 24 MHz on its fundamental mode. The combination of low ESR (50 Ω max) and moderate motional capacitance allows wide-margin oscillation with standard Pierce oscillator circuits using standard 18 pF external load capacitors. Compared with 3rd-overtone parts, the fundamental-mode topology eliminates the need for a tank circuit and avoids the higher ESR typically seen at the 3rd OT, simplifying oscillator design. Typical applications include USB 2.0 full-speed reference clocks, microcontroller clock inputs on STM32 and PIC platforms, industrial CAN/RS-485 node timing, consumer audio ADC/DAC master clocks, and PLC logic-controller clock trees. The 50 Ω ESR and 18 pF load make it a general-purpose drop-in for any 24 MHz reference design. When designing with this part, ensure PCB pad pattern matches the 5.0 x 3.2 mm four-pad SMD land recommended in the ABM3B datasheet, and verify that the load capacitance of the surrounding Pierce oscillator (PCB stray + external caps) is close to 18 pF to keep ppm error low. Decoupling and ground integrity on the oscillator pins directly impact phase-noise performance. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical layout guidance that the bare manufacturer datasheet does not consolidate in one place.
ASFLMB-100.000MHZ-LR-T - 100MHz LVCMOS MEMS Oscillator | Abracon
The Abracon ASFLMB-100.000MHZ-LR-T is a 100 MHz LVCMOS MEMS-based crystal oscillator in an ultra-miniature 5032 (5.0 x 3.2 x 0.9 mm) 4-pad SMD package. It delivers a frequency stability of ±25 ppm over the industrial -40°C to +85°C operating range and operates from a wide 1.8 V to 3.3 V supply with 15 mA typical supply current. The part integrates a standby (power-down) function on pin 1, allowing system-level power gating for battery-powered designs. Output format is LVCMOS with a typical rise/fall time suitable for high-speed logic fan-out. A MEMS oscillator is a silicon-based timing device that replaces legacy quartz crystals with a micro-electromechanical resonator, offering superior shock and vibration immunity, faster startup, and tighter stability than comparable quartz units at similar cost. In the component taxonomy, MEMS oscillators sit within crystal oscillators -> oscillators -> frequency control components -> timing devices. MEMS resonators are manufactured in standard semiconductor processes, enabling finer lot-to-lot consistency and enabling integration of the oscillator circuitry on the same silicon die. Key differentiating features of the ASFLMB series include ±25 ppm total stability (which includes post-reflow, temperature, load and supply variation per the manufacturer datasheet), an industry-standard 4-pad SMD footprint with no mechanical rotate, and low-jitter performance suitable for networking and FPGA reference-clock applications. According to the Abracon datasheet, the part is offered across 1.5 MHz to 110 MHz frequency options with multiple stability grades. Typical applications include Ethernet switch and router reference clocks, FPGA/SoC primary reference inputs, industrial controller timing, USB 2.0/3.x high-speed interfaces, and portable battery-powered instruments requiring a low-power standby mode. The wide 1.8V-3.3V supply supports direct connection to common MCU rails without level shifting. When designing with this part, place a 0.01 µF bypass capacitor between pin 2 (GND) and pin 4 (VDD) as recommended in the manufacturer datasheet, and route the output trace with 50 Ω characteristic impedance for best edge fidelity. This page synthesizes distributor pricing, drop-in alternatives from the ASFLMB family, and practical design notes not aggregated on the manufacturer product page.
DSC1123CI2-100.0000T - 100MHz LVDS MEMS Oscillator | Microchip
The Microchip Technology DSC1123CI2-100.0000T is a 100 MHz LVDS MEMS-based XO (crystal oscillator) with ±25 ppm stability, housed in a 6-pin 3.2 x 2.5 mm VDFN surface-mount package. It operates from a wide 2.25 V to 3.63 V supply (supporting both 2.5 V and 3.3 V rails) and includes an enable/disable pin for power-gating in multi-clock systems. An XO (crystal oscillator) is a self-contained timing device delivering a fixed-frequency reference clock without the need for an external crystal or tuning network. MEMS (micro-electromechanical systems) XOs replace traditional quartz resonators with a silicon mechanical structure, providing superior shock and vibration immunity, faster startup, and tighter stability over industrial temperature ranges. They sit within the broader hierarchy of clocking components: XO -> oscillator -> frequency control -> clock generation -> timing IC -> power management and signal chain. Key features of the DSC1123CI2-100.0000T include LVDS differential output (350 mV swing into 100 ohm, low EMI), ±25 ppm frequency stability across -40 °C to +85 °C, sub-1 ps RMS phase jitter (typical), and an LVDS-compatible tri-state enable/disable function on Pin 1. The 6-VDFN (3.2 x 2.5 x 0.85 mm) package provides an industry-standard footprint compatible with other 6-pin 3.2 x 2.5 mm MEMS oscillators. The DSC1123 uses a proven silicon MEMS resonator plus an analog PLL multiplier stage. This architecture eliminates quartz-related fragility and provides consistent start-up behavior at any temperature, while the LVDS output stage delivers clean 100 MHz differential signaling to high-performance serializer/deserializer (SerDes) ICs, network PHYs, and FPGA transceiver reference inputs. Typical applications include Ethernet switch clocking, FPGA reference clocks, PCIe Gen2/Gen3 reference inputs, telecom line cards, and industrial controllers. Its 2.5 V/3.3 V dual-rail compatibility simplifies designs migrating between legacy 2.5 V and modern 3.3 V logic. When designing with this part, place a 100 ohm differential termination across the LVDS output pins as close to the receiver as possible, and add 0.1 µF + 10 µF decoupling near the VDD pin. Avoid routing the enable line near switching power nodes to prevent false triggering. This page synthesizes distributor pricing, drop-in cross-brand equivalents, and practical PCB layout guidance not found in the manufacturer datasheet, giving design and sourcing teams a single authoritative reference.
ECS-2033-080-AU - 8MHz CMOS XO 3.3V Oscillator | ECS Inc.
The ECS Inc. ECS-2033-080-AU is a 8 MHz HCMOS surface-mount crystal oscillator (XO) operating from a 3.3 V supply with ±100 ppm frequency stability, housed in a subminiature 4-pad 2.5 mm × 2.0 mm × 0.8 mm SMD package. It is a standard-frequency timing source with an enable/disable function, 15 pF CMOS drive, and a 55% duty cycle, suitable for a broad range of digital clocking applications. An XO (crystal oscillator) is a self-contained timing device that integrates a quartz resonator and an oscillator IC into a single package, delivering a fixed-frequency square wave without requiring external components. Compared with bare quartz crystals, XOs provide tighter frequency tolerance and faster startup, and they sit within the broader timing-device hierarchy as: oscillator -> frequency control -> timing device -> passive/electromechanical component. The ECS-2033 series is the 3.3 V member of ECS Inc.'s subminiature SMD oscillator family, with a 2.5 V counterpart (ECS-2025) covering low-voltage designs. Key features include ±100 ppm frequency stability over the operating temperature range, an industrial operating range (one distributor listing shows the part spans from −10 °C to +70 °C with extended options available), low current consumption suitable for portable designs, and a tri-state enable/disable pad that allows the oscillator to be placed in a high-impedance state for power management in multi-clock systems. The 4-pad SMD footprint is JEDEC-standard for this subminiature class and supports reflow soldering. The oscillator uses a fundamental-mode AT-cut quartz resonator coupled to a CMOS inverter/amplifier stage, with on-chip regulation that supplies a clean 3.3 V rail to the resonator circuit. Output drive is a CMOS push-pull stage capable of driving 15 pF loads with sub-nanosecond rise/fall times, while internal damping limits jitter to within HCMOS timing budgets typical for microcontroller clock inputs. Typical applications include microcontroller and DSP clock inputs, USB-to-UART bridge reference clocks, FPGA general-purpose clock inputs, consumer electronics timing, IoT sensor hubs, and industrial controller boards. The 8 MHz frequency is a common derivative of the 48 MHz USB clock family (8 MHz × 6) and pairs naturally with low-power microcontrollers such as the ATmega328P-AUR and ATSAMD21G18A-MU families. When designing with this device, observe the enable/disable pad polarity and ensure the output load capacitance does not exceed the 15 pF specification, as additional capacitive loading degrades rise time and may push the duty cycle outside the 45–55% window. A 0.1 µF decoupling capacitor placed within 2 mm of the Vdd pad is recommended. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
FOX924B-10.000 - 10MHz TCXO 3.3V HCMOS SMD | Fox / Abracon
The Fox / Abracon FOX924B-10.000 is a 10 MHz Temperature Compensated Crystal Oscillator (TCXO) housed in a 5.0 mm x 3.2 mm surface-mount ceramic package with HCMOS output and 2.5 ppm frequency stability. It operates from a 3.3 V supply and is rated for the -30 °C to +85 °C industrial temperature range. The part is a member of the FOX924B family, the trimmed (non-voltage-controlled) variant of the FOX924 series; the E suffix on the package denotes the TCXO/VCTCXO pinout (#1 NC, #2 GND, #3 Output, #4 Vcc). A TCXO (Temperature Compensated Crystal Oscillator) is a crystal oscillator whose frequency-versus-temperature characteristic is actively corrected by a compensation network - usually a varactor driven by a temperature-sensed voltage - so that the output frequency stays within tight bounds across the operating temperature range. Compared with a plain XO, a TCXO trades a slightly higher current draw and unit cost for stability measured in parts per million rather than tens of ppm, which is why TCXOs are the default reference for cellular base stations, GPS modules, industrial metering, and any data-acquisition chain where a stable serial clock is required. Key features of the FOX924B-10.000 include 2.5 ppm frequency stability over -30 °C to +85 °C, low-profile 1.5 mm maximum height for slim-line modules, HCMOS square-wave output suitable for direct clocking of microcontrollers, FPGAs, and serializer/deserializer (SerDes) PHYs, plus a low-jitter design suitable for serial-protocol reference clocks. The 3.3 V single-rail supply simplifies power tree design; no external bias or charge-pump circuitry is required. The part is built around an AT-cut quartz resonator and a compensation IC in a hermetically sealed ceramic SMD package, delivering stable 10.000 MHz output across wide thermal swings. Its HCMOS output swings rail-to-rail with a typical rise/fall time suited for short PCB traces; a series-terminated layout is recommended when the clock is distributed more than a few centimeters. Typical applications include GPS/GNSS module reference clocks, cellular IoT (NB-IoT, LTE-M) timing references, industrial data loggers, smart-metering and energy-monitoring endpoints, machine-to-machine (M2M) communication modules, and consumer wearables requiring a stable low-jitter reference. Its 5x3.2 mm footprint is also well suited for compact handheld and portable designs. When designing with this device, place a 0.1 µF decoupling capacitor as close as possible to pin #4 (Vcc) and keep the output trace short and impedance-controlled. If a VCTCXO (voltage-controlled) variant is needed for PLL pulling, use the FOX924E equivalent from the same family. This page synthesizes distributor pricing, same-family Fox drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
KC2520B24.0000C1GE00 - 24MHz CMOS XO Oscillator | KYOCERA AVX
The KYOCERA AVX KC2520B24.0000C1GE00 is a 24.0000 MHz CMOS-output standard clock oscillator (SPXO) from the KC2520B / KC2520C-C1 series, housed in a 4-pad 2.50 mm x 2.00 mm surface-mount no-lead package. It accepts a supply voltage of 1.6 V to 3.63 V (typical operating points 1.8 V, 2.5 V, 3.3 V), delivers a CMOS square-wave output, and provides a Standby (Power-Down) function on pin 1 for power-gated designs. An XO (crystal oscillator) is a self-contained timing device that integrates a quartz resonator and an oscillation circuit in a single sealed package, eliminating the need for external load capacitors or matching networks. Compared with a bare quartz crystal, an SPXO offers higher drive strength, a clean logic-level output, and tighter initial frequency tolerance, making it the workhorse timing source for digital MCUs, SoCs, and high-speed serial links. Key features of the KC2520B24.0000C1GE00 include a ±50 ppm frequency stability over the full -40 °C to +85 °C operating range, a CMOS output drive capable of sinking/sourcing 15 pF loads, 55 % typical symmetry, and very low standby current. The 4-pad SMD package enables reflow-compatible assembly and excellent mechanical stability for handheld and industrial equipment. Architecturally, this part is built around an AT-cut quartz resonator and a CMOS-compatible sustaining amplifier, with internal voltage regulation that allows operation across the 1.6 V – 3.63 V supply window without external level translation. The KC2520C-C1 series targets applications where a small footprint, low power consumption, and stable frequency are simultaneously required. Typical applications include smartphone and tablet PC main reference timing, communication-module clocking, wearable and audio devices, industrial controllers, and base-station equipment. The 24 MHz output is widely used for USB full-speed peripherals, low-power MCU reference clocks, and audio DSP clock trees. When designing with this part, place the decoupling capacitor within 2 mm of the VDD pin, keep the standby pin either tied high through a pull-up or driven by a logic-level GPIO, and avoid routing high-speed signal traces directly under the oscillator to minimise load-capacitance drift and jitter. This page synthesises distributor pricing, drop-in alternatives from the KC2520 family and competing 2.5 x 2.0 mm CMOS XO parts, and practical design notes that are not aggregated in the manufacturer datasheet alone.
LFXTAL003156BULK - 8MHz ±30ppm Crystal 30pF HC-49/4H | IQD
The IQD Frequency Products LFXTAL003156BULK is an 8 MHz fundamental-mode quartz crystal with ±30 ppm frequency tolerance and ±50 ppm frequency stability, housed in a 2-pin through-hole HC-49/4H metal package measuring 11.05 x 4.7 x 4.1 mm. The device operates at the parallel resonant fundamental mode with a load capacitance of 30 pF and an equivalent series resistance (ESR) of 40 ohms, making it a standard reference for low-cost microcontroller and digital logic clock circuits. A quartz crystal is a passive electromechanical resonator that exploits the piezoelectric effect of an AT-cut or BT-cut quartz blank. When inserted into an oscillator circuit, it provides a stable frequency reference whose accuracy is governed by the cut angle, the mechanical dimensions, and the load capacitance presented by the external oscillator stage. Crystals are classified as resonators under the broader category of frequency-control devices, which also includes ceramic resonators, SAW devices, MEMS oscillators, and TCXO/OCXO modules. Compared to ceramic resonators, quartz crystals offer 10-100x better frequency stability and tighter tolerance, which is why they remain the dominant timing reference in digital electronics. Key features of the LFXTAL003156BULK include 8.0 MHz nominal frequency, 30 pF load capacitance rating, 40 ohm maximum ESR, ±30 ppm initial tolerance (at 25°C), and ±50 ppm stability over the operating temperature range. Aging is specified at 5 ppm per year, and the part is rated for operation from -20°C to +70°C. The through-hole HC-49/4H package is a vertically mounted, leaded format preferred for hobbyist, industrial, and educational designs where leaded components simplify prototyping, rework, and mechanical strain relief. The crystal uses a fundamental-mode AT-cut quartz blank driven at its primary 8 MHz resonance, which avoids spurious overtone responses and simplifies oscillator loop design. The 30 pF load capacitance corresponds to a typical Pierce oscillator configuration with two external load capacitors of approximately 27 pF each (assuming 5 pF stray capacitance). At 40 ohms ESR, the part is well within the drive capability of virtually any modern microcontroller's internal Pierce oscillator. Typical applications include microcontroller clock references for 8051, PIC, AVR, and STM8 devices, digital logic clock trees, USB-to-UART bridge circuits, simple UART baud-rate generators, and educational/development boards. The 8 MHz frequency is also useful as a system clock for 8-bit MCUs that derive lower internal frequencies via divider chains. When designing with the LFXTAL003156BULK, place the crystal as close as possible to the oscillator pins of the IC and route the load capacitors symmetrically to ground. Keep the crystal traces short to minimize parasitic capacitance and stray pickup, and avoid routing noisy signal or power lines beneath the crystal can to prevent frequency pulling. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
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.
SIT1602BC-23-33N-28.636300 - 28.6363 MHz LVCMOS XO 3.3V | SiTime
The SiTime SIT1602BC-23-33N-28.636300 is a 28.6363 MHz HCMOS/LVCMOS fixed-frequency crystal oscillator (XO) operating from a 3.3 V supply in a 4-pin 3.2 x 2.5 mm SMD package. It provides a standard 50 ppm frequency stability across the -20 °C to +70 °C commercial operating range, with default drive strength and a no-connect feature on the standby pin. An XO (crystal oscillator) is a self-contained timing device that delivers a fixed square-wave frequency without requiring an external resonator, used as a system clock source in digital designs. The SiT1602B family is built on SiTime's silicon MEMS technology rather than quartz, which yields superior mechanical robustness, better immunity to vibration and shock, and tighter stability than legacy quartz-based oscillators in the same footprint. Key features include 28.6363 MHz nominal output, 50 ppm total stability over temperature, 3.3 V single-supply operation, HCMOS/LVCMOS-compatible output drive, and a small 3.2 x 2.5 mm 4-pin SMD package. The datasheet specifies 100% pin-to-pin compatibility with conventional quartz XOs of the same package footprint, simplifying migration paths and re-designs. Architecturally, the SiT1602B integrates a MEMS resonator, a low-jitter PLL, and an HCMOS output driver on a single die. Because the resonator is silicon and factory-trimmed, the part exhibits markedly better start-up consistency, lower sensitivity to board-level stress, and improved frequency aging versus quartz equivalents, at a comparable bill-of-materials cost. Typical applications include microcontroller and SoC clocking, USB 2.0 reference timing, industrial automation controllers, consumer-electronics main clocks, and embedded serial-link PHYs. Designers select the SIT1602B family when footprint drop-in replacement of a quartz XO is required alongside tighter temperature behavior and improved mechanical durability. When designing with this part, place the decoupling capacitor as close as possible to pin 2 (VDD) and route the output trace (pin 4) over a continuous ground reference to minimize radiated emissions. Confirm that downstream counter/PLL input thresholds are compatible with the LVCMOS swing rail. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer's standard product page.
SIT1602BI-11-30S-66.600000 - 66.6MHz MEMS XO 3V Standby | SiTime
The SiTime SIT1602BI-11-30S-66.600000 is a low-power, fixed-frequency MEMS oscillator (XO) delivering a 66.6 MHz HCMOS/LVCMOS output from a 1.8V to 3.3V supply in a 4-pin SMD, No Lead (2.5x2.0 mm) package. It is configured for 3.0V operation (the "30" in the part number) and includes a Standby (Power Down) function (the "S" pin-1 option) for battery-aware applications. What is a MEMS oscillator? A MEMS (Micro-Electro-Mechanical Systems) oscillator is a solid-state timing device that replaces traditional quartz crystals with a silicon resonator and an integrated PLL/divider network. Compared to quartz XOs, MEMS XOs provide superior vibration tolerance, better aging characteristics, faster startup (typically 5 ms for the SiT1602 family), and better immunity to EMI. As a fixed-frequency device, the SIT1602B fits into the taxonomy: oscillator -> MEMS oscillator -> XO -> frequency control component -> passive/timing device. Key features include ±20 ppm frequency stability over -40C to +85C, typical supply current of 3.5 mA at 1.8V, and a continuous 1.62V to 3.63V supply range that lets one device serve 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V rails. The SiT1602B is a 100% pin-to-pin drop-in replacement for legacy quartz-based XOs in standard 4-pad SMD layouts, simplifying PCB redesign when migrating from crystal-based oscillators. Architecture-wise, the SiTime MEMS oscillator uses a programmable silicon resonator plus an analog PLL to synthesize the target frequency. Internal LDOs and a temperature-compensation block maintain frequency accuracy over temperature. The Standby pin (S in the part number) drives the device to <10 uA current when held low, which is critical for handheld and IoT battery-powered designs. Typical applications include IoT sensor nodes, wearables, portable medical devices, microcontroller clock inputs, and any compact embedded system where a 66.6 MHz reference is needed and PCB space is at a premium. The 2.5x2.0 mm footprint enables use in tight enclosures such as BLE wearables and small-form-factor industrial modules. When designing with the SiT1602B, place a 0.1 uF decoupling capacitor as close as possible to the VDD pin and ensure the Standby pin is either driven logic-high (run) or logic-low (power down) — leaving it floating can cause undefined behavior. The output drive strength is suitable for short PCB traces; if you route the clock to multiple loads, consider buffering. The device does not need an external series resistor, unlike some quartz oscillator circuits. This page synthesizes distributor pricing, drop-in alternatives within the SiT1602 family, and practical design notes not found in the manufacturer datasheet alone.
SIT9002AI-233N33DQ100.00000Y - 100MHz LVDS MEMS Oscillator | SiTime
The SiTime SIT9002AI-233N33DQ100.00000Y is a programmable 100 MHz spread-spectrum differential MEMS oscillator housed in a 6-pin 5.0 x 3.2 mm SMD (5032) package. It delivers LVDS output at 3.3 V supply with ±50 ppm frequency stability across the industrial -40°C to +85°C range, and integrates a -1.0% center-spread modulation profile for EMI reduction. A spread-spectrum oscillator (SSXO) is a programmable timing device that intentionally modulates its output frequency across a narrow band around the target frequency, typically by ±0.5% to ±2.0%. In the hierarchy of timing components, this places the SiT9002 family above standard crystal oscillators (XO) and below more advanced jitter-cleaner PLL devices; it belongs to the broader class of MEMS oscillators that replace legacy quartz resonators with silicon-based mechanical structures. Spread-spectrum modulation is most often used to suppress peak electromagnetic emissions in high-speed serial links. Key features include support for four programmable differential output types (LVDS, LVPECL, HCSL, and CML), integrated 50-ohm near-termination on each output pin, and a pin-1 Select/Digital Enable function for power-gating. The device is built on SiTime's MEMS-first silicon-gate process, which delivers resilience against shock and vibration orders of magnitude better than quartz. Output rise/fall times are held below 1 ns to support 100 MHz LVDS links. At the architecture level, the part combines a MEMS resonator, a fractional-N PLL multiplier, and an LVDS driver. Frequency is factory-programmed between 1 MHz and 220 MHz, while the spread profile is configurable in steps down to -0.25%. The internal PLL supports low multiplicative jitter, typically under 1 ps RMS over the 12 kHz to 20 MHz integration band relevant to PCIe, Ethernet, and SATA reference clocks. Typical applications include PCI Express Gen 2/3 reference clocks, SATA and SAS storage interfaces, multi-gigabit Ethernet PHYs, FPGA fabric clocks in Spartan-6/Kintex-7 reference designs, and high-speed serial link retimers. The -1.0% down-spread profile reduces EMI peak amplitude by approximately 7-10 dB measured at the third harmonic, easing compliance with FCC and CE radiated emissions limits. When designing with this device, place the four-layer stack-up with a continuous ground beneath the 5032 footprint and keep LVDS traces to 100-ohm differential impedance with length matching under 5 mil. Decouple VDD with a 0.1 µF ceramic capacitor placed within 2 mm of pin 4 to suppress PLL power-rail noise modulation. The pin-1 SD input also doubles as output enable; tie it high when unused. This page synthesizes distributor pricing, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.