component
1XTV21850MAA
Public Made by Adomby adom
KDS Daishinku Temperature Compensated Crystal Oscillators (TCXOs), SMD3225-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdown1XTV21850MAA
KDS Daishinku · Temperature Compensated Crystal Oscillators (TCXOs) · SMD3225-4P
1XTV21850MAA 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 | VCONT | input | Frequency control voltage input, range +0.5 to +2.5 V (+1.5 V typ.), positive slope, input resistance 500 kΩ min. |
| 2 | GND | power_in | Ground connection. |
| 3 | Output | output | Clipped sine wave output (DC-coupled), 0.8 Vp-p min. into 10 kΩ//10 pF load. |
| 4 | VCC | power_in | Supply voltage pin, +2.85 to +3.15 V recommended (+3.0 V typ.), 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 (abs max) | VCC | -0.3 | 4.6 | V | 2 | ||
| Storage Temperature Range | T_STG | -40 | 85 | 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 | |
| Control Voltage Range | VCONT | 0.5 | 1.5 | 2.5 | V | 2 | |
| Operating Temperature Range | T_OPR | -30 | 80 | C | 2 | ||
| Nominal Frequency | 21.85 | MHz | 2 | ||||
| Current Consumption | 2 | mA | TA=-30~+80C, LOAD_R//C=10kΩ//10pF, VCC=+3.0V, VCONT=+1.5V | 2 | |||
| Output Level | 0.8 | VP-P | TA=-30~+80C, LOAD_R//C=10kΩ//10pF, VCC=+3.0V, VCONT=+1.5V | 2 | |||
| Symmetry | 40 | 60 | % | GND level (DC cut) | 2 | ||
| Harmonics | -5 | dBc | TA=-30~+80C, LOAD_R//C=10kΩ//10pF, VCC=+3.0V, VCONT=+1.5V | 2 | |||
| Frequency Tolerance | -1.5 | 1.5 | ppm | After 2 times reflow, Ref. to nominal frequency, TA=+25C | 2 | ||
| Frequency vs Temperature | -2.5 | 2.5 | ppm | TA=-30~+80C, Ref. to frequency (TA=+25C) | 2 | ||
| Frequency vs Supply Voltage | -0.3 | 0.3 | ppm | VCC=+3.0V±5% | 2 | ||
| Frequency vs Load Variation | -0.3 | 0.3 | ppm | LOAD_R//C=(10kΩ//10pF)±10% | 2 | ||
| Frequency vs Aging | -1 | 1 | ppm/year | TA=Room ambient | 2 | ||
| Start Up Time | 3 | ms | @90% of final Vout level | 2 | |||
| Frequency Control Range | 8 | ppm | VCONT=+1.5V±1.0V | 2 | |||
| Frequency Control Input Resistance | 500 | kΩ | 2 | ||||
| SSB Phase Noise | -130 | dBc/Hz | Relative to f0 level offset 1kHz | 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:
1XTV21850MAA - Footprint:
Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm - 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files:
1xtv21850maa-etched.step/1xtv21850maa-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1xtv21850maa.step/1xtv21850maa.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: KDS Daishinku datasheet (14 pp, sha256
2baf19b676d879aa, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).