NX3225GA-13.56M-STD-CRG-2 13.56MHz Crystal 8pF SMD | NDK
MPN: NX3225GA-13.56M-STD-CRG-2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.2011 | $0.20 |
| 10 | $0.19 | $1.90 |
| 100 | $0.16 | $16.00 |
| 500 | $0.13 | $65.00 |
| 1,000 | $0.11 | $110.00 |
Drop-in alternatives for NX3225GA-13.56M-STD-CRG-2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NX3225GA-25.000M-STD-CRG-2
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View Datasheet →NX3225GA-25MHZ-STD-CRG-2
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View Datasheet →NX3225GA-24.000MHZ
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View Datasheet →NX3225GA-12.000MHZ
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View Datasheet →NX3225GA-CC
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View Datasheet →NX3225GA-13.56M-STD-CRG-2 Maximum Ratings & Electrical Characteristics
| Type | MHz Crystal Unit |
| Nominal Frequency | 13.56 MHz |
| Frequency Tolerance | ±20 ppm (at 25C) |
| Frequency Stability | ±30 ppm |
| Load Capacitance | 8 pF |
| ESR (Equivalent Series Resistance) | 80 Ohm |
| Operating Mode | Fundamental |
| Operating Temperature | -40C to +85C |
| Series | NX3225GA |
| Specification Number | STD-CRG-2 |
| Package | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) |
| Mounting Type | Surface Mount |
| Part Status | Active |
| Frequency Band | 9.8 MHz to 50 MHz (series range) |
| Application | RFID/NFC, industrial automation clocking |
NX3225GA-13.56M-STD-CRG-2 Pin Configuration
| Pin 1 | XTAL1 — Crystal terminal 1 (connect to oscillator inverter input) |
| Pin 2 | GND — Ground / shielding pad tied to ceramic package lid |
| Pin 3 | XTAL2 — Crystal terminal 2 (connect to oscillator inverter output) |
| Pin 4 | GND — Ground / shielding pad tied to ceramic package lid |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
NX3225GA-13.56M-STD-CRG-2 is suitable for 6 applications: 13.56 MHz RFID / NFC Readers, Industrial Automation MCU Clocking, Wireless Charging and Proximity Sensing, Smart Meters and Building Automation, Contactless Smart Cards and Payment Terminals, Test and Measurement Fixtures.
13.56 MHz RFID / NFC Readers
The NX3225GA-13.56M-STD-CRG-2 is purpose-aligned with RFID and NFC reader designs because its nominal 13.56 MHz frequency directly matches the contactless carrier band used by ISO 14443-type smart-card and NFC systems. The ±20 ppm tolerance plus ±30 ppm stability keeps the carrier within the reader air-interface budget, while the 80 ohm ESR is easily driven by the oscillator cells integrated in common NFC reader ICs. In a typical Pierce topology, two 10 to 15 pF load capacitors set the 8 pF load condition; place the crystal within a few millimeters of the reader IC with a solid ground return to minimize phase noise. Because it is a passive crystal rather than an oscillator module, it adds no supply current and no switching artifacts into the sensitive analog front end of the reader.
Recommended
Industrial Automation MCU Clocking
In industrial automation controllers, the NX3225GA-13.56M-STD-CRG-2 provides a robust MCU or FPGA clock reference across the full -40C to +85C industrial temperature range. The ±30 ppm stability over temperature avoids the need for temperature compensation in general-purpose control loops, while the 80 ohm maximum ESR guarantees startup with standard inverter transconductance even at cold temperatures where crystal Q and motional parameters degrade. Its compact 3.2 x 2.5 x 0.75 mm no-lead footprint suits dense PLC I/O and motor-control boards where board area is at a premium. As a passive component it draws zero quiescent current, an advantage over packaged oscillators in always-on nodes. Layout best practice: short series trace to the inverter input, guard ring, and load capacitors placed directly at the pads with via-stitched ground pour.
Recommended
Wireless Charging and Proximity Sensing
Wireless charging transmitters and inductive proximity sensors frequently reference a 13.56 MHz-derived timing chain, and the NX3225GA-13.56M-STD-CRG-2 fits this role with its fundamental-mode 13.56 MHz resonance and tight ±50 ppm worst-case frequency budget. The fundamental operating mode removes overtone-suppression components, simplifying the BOM around the controller IC. With an 8 pF load capacitance, the two external capacitors can be standard NP0/C0G ceramics, preserving frequency accuracy over temperature better than X7R dielectrics. The crystal's low profile of 0.75 mm also suits coil-driver PCBs stacked under charging pads where height is constrained. Designers should verify drive level stays within the series limit by sizing the series resistor so crystal current remains well below the datasheet maximum.
Recommended
Smart Meters and Building Automation
Smart metering and building-automation nodes benefit from the NX3225GA-13.56M-STD-CRG-2's combination of long-term availability (part status Active in NDK's lineup), industrial temperature rating, and low unit cost starting near $0.20. Its passive nature means no oscillator supply rail is needed, simplifying power-domain design in meters where the MCU sleeps most of the time. The 3225 package reflows on standard lead-free profiles and withstands rework. For sub-GHz or 2.4 GHz radio subsystems in the same meter, designers often pair this 13.56 MHz crystal for the controller with a higher-frequency same-family part such as the NX3225GA-25.000M-STD-CRG-2 for the radio PLL reference - both share one footprint in CAD libraries, cutting qualification effort across product variants.
Recommended
Contactless Smart Cards and Payment Terminals
Payment terminals and contactless front ends operating the 13.56 MHz carrier need a frequency reference that meets both cost and regulatory stability targets; the NX3225GA-13.56M-STD-CRG-2 delivers ±20 ppm initial tolerance and ±30 ppm drift, adequate for terminal-side carrier generation. The 80 ohm ESR ensures dependable oscillation with the low-power inverter cells typical of secure-payment MCUs, and the hermetically sealed ceramic SMD construction resists the thermal cycling of high-volume reflow and field use. Because EMC pre-compliance matters in payment hardware, keep the crystal loop area minimal - load capacitors on the component side, ground pours on both layers, and no signal routing beneath the crystal. The 3.2 x 2.5 mm footprint integrates easily alongside antenna-matching networks near the board edge.
Recommended
Test and Measurement Fixtures
Bench and production test fixtures that stimulate DUTs at the 13.56 MHz NFC carrier use the NX3225GA-13.56M-STD-CRG-2 as a low-cost onboard reference. Its fundamental-mode operation yields clean spectral output with the crystal's inherently high Q, minimizing reference spurs in the fixture's stimulus chain. The ±50 ppm worst-case accuracy is sufficient for functional pass/fail testing, and where finer verification is needed the fixture output can be calibrated against a house standard. The crystal's 0.75 mm height and no-lead pads survive repeated handling and reflow in fixture refurbishment. For fixtures clocking host MCUs and RF instruments simultaneously, pairing with the same-family NX3225GA-24.000MHZ on the identical footprint standardizes the fixture BOM and simplifies sourcing through one NDK series.
Recommended
Recommended Products Summary
Engineering reference data for NX3225GA-13.56M-STD-CRG-2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NX3225GA-25.000M-STD-CRG-2 | NX3225GA-25MHZ-STD-CRG-2 | NX3225GA-24.000MHZ | NX3225GA-12.000MHZ | NX3225GA-CC |
|---|---|---|---|---|---|---|
| Package | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) - same | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) - same | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) - same | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) - same | 4-SMD, No Lead (3.2 x 2.5 x 0.75 mm) - same |
| Brand | NDK | NDK - same | NDK - same | NDK - same | NDK - same | NDK - same |
| Nominal Frequency | 13.56 MHz | 25.000 MHz | 25 MHz | 24.000 MHz | 12.000 MHz | [DATA_NEEDED] |
| Load Capacitance | 8 pF | 8 pF (STD-CRG-2) | 8 pF (STD-CRG-2) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Frequency Tolerance | ±20 ppm | ±20 ppm (STD-CRG-2) | ±20 ppm (STD-CRG-2) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| ESR (max) | 80 Ohm | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Temperature | -40C to +85C | -40C to +85C (series) | -40C to +85C (series) | -40C to +85C (series) | -40C to +85C (series) | -40C to +85C (series) |
| Operating Mode | Fundamental | Fundamental | Fundamental | Fundamental | Fundamental | Fundamental |
| Unit Price (qty 1, as of 2026-09-14) | $0.2011 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Exact 13.56 MHz carrier frequency (vs NX3225GA-12.000MHZ)
- Identical 3225 footprint across the family (vs NX3225GA-25.000M-STD-CRG-2)
- Low ESR of 80 ohm in fundamental mode (vs NX3225GA-24.000MHZ)
Design Notes
Keep the crystal loop as small as possible: place the two load capacitors within 1-2 mm of the XTAL pads, route the crystal traces on the component side only, and do not run switching signals under or adjacent to the crystal. Use a via-stitched ground pour around the crystal area tied to the ground pads (pins 2 and 4) which connect to the package lid for shielding. Estimated: a loop area reduction from 20 mm2 to 5 mm2 reduces radiated emission contribution roughly 4x in the 13.56 MHz band.
The 80 ohm ESR sets the startup margin: ensure the inverter negative resistance is at least 3x (preferably 5x) 80 ohms, i.e., about 240-400 ohms. If a series resistor is used to limit drive level, start with 100 to 330 ohms and verify oscillation margin at -40C, where crystal motional resistance rises. Excessive drive can age the crystal and shift frequency; insufficient drive risks slow or failed startup.
Frequency error budget is ±50 ppm worst case (±20 ppm tolerance + ±30 ppm stability). Using X7R dielectric load capacitors or ignoring PCB stray capacitance (2-3 pF typical) can add tens of ppm of pulling on the 8 pF load condition - use NP0/C0G capacitors and trim values empirically on the first article. Do not substitute a different spec code (e.g., NX3225GA-CC) without verifying frequency-specific ESR and load capacitance.
Compliance Information
Compliance status was not stated in the retrieved distributor or manufacturer data; request material declarations from NDK for the STD-CRG-2 spec code.
