# TZ0375B

**TST** · Crystals · SMD3225-4P

TZ0375B from TST, 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 | IN/OUT | passive | Crystal terminal (IN/OUT) for the 32.000000 MHz fundamental-mode crystal, specified for 12 pF load capacitance and 10 uW nominal drive level. |
| 2 | GND | power_in | Ground pin, connected to the lid/cover per the Base 2 drawing. |
| 3 | IN/OUT | passive | Second crystal terminal (IN/OUT), with ESR 50 ohm max and shunt capacitance 3.0 pF max. |
| 4 | GND | power_in | Ground pin, connected to the lid/cover per the Base 2 drawing. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TST |
| Package | SMD3225-4P |
| Category | Crystal Oscillator/Oscillator/Resonator |
| 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 over Operating Temperature |  | -10 |  | 10 | ppm | referred to the value at 25°C | 3 |
| Frequency Make Tolerance (FL) | FL | -10 |  | 10 | ppm | @ 25°C +/- 3°C | 3 |
| Aging |  | -1 |  | 1 | ppm/year |  | 3 |
| Equivalent Series Resistance | ESR |  |  | 50 | Ω |  | 3 |
| Shunt Capacitance | Co |  |  | 3 | pF |  | 3 |
| Insulation Resistance |  | 500 |  |  | MΩ | DC 100V | 3 |
| Operating Temperature Range |  | -30 |  | 85 | °C |  | 3 |
| Storage Temperature Range |  | -40 |  | 85 | °C |  | 3 |
| Nominal Frequency |  |  | 32 |  | MHz | Fundamental mode | 3 |
| Load Capacitance | CL |  | 12 |  | pF |  | 3 |
| Nominal Drive Level |  |  | 10 |  | uW |  | 3 |

## CAD (KiCad official)

- Symbol: `TZ0375B`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `tz0375b-etched.step` / `tz0375b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tz0375b.step` / `tz0375b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TST datasheet](docs/tz0375b-datasheet.pdf) (8 pp, sha256 `c1ef39c4947dd4a5`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tz0375b-datasheet.pdf)