# TZ0757B

**TST** · Crystals · SMD3225-4P

TZ0757B 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 #1, labelled IN/OUT on the datasheet, is one of the two signal terminals of the crystal unit and no further limit or function is stated. |
| 2 | GND | power_in | Terminal #2 is connected to GND on the datasheet and no further limit or function is stated. |
| 3 | IN/OUT | passive | Crystal terminal #3, labelled IN/OUT on the datasheet, is the second signal terminal of the crystal unit and no further limit or function is stated. |
| 4 | GND | power_in | Terminal #4 is connected to GND on the datasheet and no further limit or function is stated. |

## 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 |
|---|---|---|---|---|---|---|---|
| Insulation Resistance |  | 500 |  |  | MΩ | DC 100V | 3 |
| Frequency Make Tolerance (FL) | FL | -10 |  | 10 | ppm | @ 25°C ±3°C | 3 |
| Frequency Stability over Operating Temperature Range |  | -10 |  | 10 | ppm | Over operating temperature range, referred to the value at 25°C | 3 |
| Equivalent Series Resistance (ESR) | ESR |  |  | 50 | Ω |  | 3 |
| Operating Temperature Range |  | -20 |  | 70 | °C |  | 3 |
| Storage Temperature Range |  | -40 |  | 85 | °C |  | 3 |
| Nominal Frequency |  |  | 30 |  | MHz |  | 3 |
| Load Capacitance (CL) | CL |  | 10 |  | pF |  | 3 |
| Nominal Drive Level |  |  | 10 |  | µW | Nominal | 3 |

## CAD (KiCad official)

- Symbol: `TZ0757B`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `tz0757b-etched.step` / `tz0757b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tz0757b.step` / `tz0757b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TST datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589868893414973440) (7 pp, sha256 `469f109f00a71c90`, retrieved 2026-10-15, tier: lcsc)
- **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/tz0757b-datasheet.pdf)