# TZ0475B

**TST** · Crystals · SMD3225-4P

TZ0475B 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 40.000000 MHz fundamental-mode resonator, with 15 pF load capacitance, 25 ohm max ESR and 100 uW typical (200 uW max) drive level. |
| 2 | GND | power_in | Ground pin, connected to the package per the pin connection table and internal connection drawing; the datasheet gives no electrical limits for it. |
| 3 | IN/OUT | passive | Second crystal terminal (IN/OUT) for the 40.000000 MHz fundamental-mode resonator, with 15 pF load capacitance, 25 ohm max ESR and 100 uW typical (200 uW max) drive level. |
| 4 | GND | power_in | Ground pin, connected to the package per the pin connection table and internal connection drawing; the datasheet gives no electrical limits for it. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TST |
| 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 make tolerance (FL) | FL | -10 |  | 10 | ppm | @ 25C +/- 3C | 3 |
| Frequency stability over operating temperature range |  | -10 |  | 10 | ppm | Over operating temperature range, referred to the value at 25C | 3 |
| Equivalent Series Resistance (ESR) | ESR |  |  | 25 | ohm |  | 3 |
| Shunt Capacitance (Co) | Co |  |  | 5 | pF |  | 3 |
| Nominal Drive Level |  |  | 100 | 200 | uW | Typical 100 uW, maximum 200 uW | 3 |
| Insulation Resistance |  | 500 |  |  | M | DC 100V | 3 |
| Operating Temperature Range |  | -20 |  | 85 | C |  | 3 |
| Storage Temperature Range |  | -40 |  | 85 | C |  | 3 |
| Nominal Frequency |  |  | 40 |  | MHz |  | 3 |
| Load Capacitance (CL) | CL |  | 15 |  | pF |  | 3 |

## CAD (KiCad official)

- Symbol: `TZ0475B`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `tz0475b-etched.step` / `tz0475b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tz0475b.step` / `tz0475b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TST datasheet](docs/tz0475b-datasheet.pdf) (8 pp, sha256 `b7b6467813253589`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/tz0475b-datasheet.pdf)