# S3225SMD24MOSC

**SST** · Crystal Oscillators · SMD3225-4P

S3225SMD24MOSC from SST, 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 | INHB | input | Output state control (tri-state enable): H or open selects normal oscillator output, L (low) puts the output in tri-state (high impedance), and the pin must not be grounded or the oscillator output goes high impedance. |
| 2 | Vss | power_in | Ground (GND) reference pin for the oscillator. |
| 3 | QOUT | output | Oscillator clock output; normal output when enabled, high impedance when INHB is pulled low. Specified as 15pF/HCMOS/TTL compatible load. |
| 4 | VDD | power_in | Supply voltage pin; the datasheet gives an operating voltage of 3.3V±10% (and 1.8V±10% listed as an option). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SST |
| 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 |
|---|---|---|---|---|---|---|---|
| Frequency stability |  | -20 |  | 20 | ppm |  | 2 |
| Aging per year (年老化) |  | -5 |  | 5 | ppm |  | 2 |
| Supply voltage tolerance | VDD | -10 |  | 10 | % | nominal 3.3 V | 2 |
| Input current |  |  |  | 10 | mA |  | 2 |
| Duty cycle |  | 40 |  | 60 | % |  | 2 |
| Rise/fall time |  |  |  | 8 | ns |  | 2 |
| Output low level |  |  |  | 0.4 | V | TTL | 2 |
| Output low level |  |  |  | 10 | %VDD | HCMOS | 2 |
| Output high level |  | 2.4 |  |  | V | TTL | 2 |
| Output high level |  | 90 |  |  | %VDD | HCMOS | 2 |
| Startup time (起振时间) |  |  |  | 5 | ns |  | 2 |
| Storage temperature |  | -40 |  | 85 | °C |  | 2 |
| Operating temperature |  | -40 |  | 85 | °C |  | 2 |
| Room-temp frequency change after vibration |  | -10 |  | 10 | ×10^-6 | Vibration 10-55 Hz, 1.5 mm p-p, 30 min in each of 3 perpendicular directions | 5 |
| Room-temp frequency change after climatic sequence |  | -10 |  | 10 | ×10^-6 | Climatic sequence: dry heat 100°C, cyclic damp heat, low temp -65°C | 5 |
| Room-temp frequency change after steady-state damp heat |  | -10 |  | 10 | ×10^-6 | 40°C, 90-95% RH, 10 d | 5 |
| Room-temp frequency change after aging |  | -10 |  | 10 | ×10^-6 | 85°C ±3°C, 30 d | 5 |
| Room-temp frequency change after drop |  | -10 |  | 10 | ×10^-6 | Drop from 50 cm onto 30 mm hardboard, 3 times | 5 |
| Nominal frequency |  |  | 24 |  | MHz |  | 2 |

## CAD (KiCad official)

- Symbol: `S3225SMD24MOSC`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `s3225smd24mosc-etched.step` / `s3225smd24mosc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s3225smd24mosc.step` / `s3225smd24mosc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SST datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602998622397624320) (5 pp, sha256 `96491e4f2639c9d6`, retrieved 2026-10-14, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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](docs/s3225smd24mosc-datasheet.pdf)