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1XTW29491PAA

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KDS Daishinku Temperature Compensated Crystal Oscillators (TCXOs), SMD3225-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1XTW29491PAA

KDS Daishinku · Temperature Compensated Crystal Oscillators (TCXOs) · SMD3225-4P

1XTW29491PAA from KDS Daishinku, in a SMD3225-4P. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground connection; pin #1 is the indexed pin of the DSB321SDN TCXO.
2 GND power_in Ground connection of the TCXO, tied to the measurement-circuit GND.
3 Output output Clipped sine wave (DC-coupled) output, min 0.8 Vp-p into 10 kΩ // 10 pF load.
4 VCC power_in Supply voltage input, +2.85 to +3.15 V (typ +3.0 V), absolute maximum -0.3 to +4.6 V.

Key specifications

Parameter Value
Manufacturer KDS Daishinku
Package SMD3225-4P
Category Crystals/Oscillators/Resonators
Pins 4

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage VCC -0.3 4.6 V 2
Storage Temperature Range T_STG -55 105 °C 2
Supply Voltage VCC 2.85 3 3.15 V 2
Load Impedance (resistance part) LOAD_R 9 10 11 kΩ 2
Load Impedance (parallel capacitance) LOAD_C 9 10 11 pF 2
Operating Temperature Range T_OPR -30 85 °C 2
Nominal Frequency 29.4912 MHz 2
Current Consumption 2 mA TA=-40~+85°C, LOAD_R//C=10kΩ//10pF, VCC=+3.0V 2
Output Level 0.8 VP-P Clipped sine wave (DC-coupled) 2
Symmetry 40 60 % GND level (DC cut) 2
Harmonics -5 dBc 2
Frequency Tolerance -1.5 1.5 ppm After 2 times reflow, ref. to nominal frequency, TA=+25°C 2
Frequency vs Temperature -2 2 ppm TA=-30~+80°C, ref. to frequency (TA=+25°C) 2
Frequency vs Supply Voltage -0.2 0.2 ppm VCC=+3.0V±0.15V 2
Frequency vs Load Variation -0.2 0.2 ppm LOAD_R//C=(10kΩ//10pF)±5% 2
Frequency Aging per day -0.02 0.02 ppm/day TA=Room ambient, after 1h of operation 2
Frequency Aging per year -1 1 ppm/year TA=Room ambient, after 1h of operation 2
Start Up Time 2 ms @90% of final Vout level 2
SSB Phase Noise -80 dBc/Hz Relative to f0 level offset 10Hz 2
SSB Phase Noise -110 dBc/Hz Relative to f0 level offset 100Hz 2
SSB Phase Noise -130 dBc/Hz Relative to f0 level offset 1kHz 2
SSB Phase Noise -140 dBc/Hz Relative to f0 level offset 10kHz 2
SSB Phase Noise -143 dBc/Hz Relative to f0 level offset 100kHz 2
SSB Phase Noise -145 dBc/Hz Relative to f0 level offset 1MHz 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing PET Cover Tape : PET + Olefin Resin (Conductivity) 8
contacts silver Leads, such as solder, are not used for this product. (Lead Free) 17.6 About the existence of silver and mercury use 13

CAD (KiCad official)

  • Symbol: 1XTW29491PAA
  • Footprint: Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm
  • 3D model: SMD3225-4P (KiCad packages3D, STEP)
  • 3D model files: 1xtw29491paa-etched.step / 1xtw29491paa-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1xtw29491paa.step / 1xtw29491paa.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: KDS Daishinku datasheet (14 pp, sha256 9139d916ab0359cd, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF