# TZ2094A

**TST** · Crystals · SMD2520-4P

TZ2094A from TST, in a SMD2520-4P. 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) of the 12.000000 MHz fundamental-mode crystal, load capacitance 12 pF, drive level 10uW typical and 100uW max. |
| 2 | GND | passive | Ground pad per the pin connection table; not connected to the crystal element in the internal connection drawing. |
| 3 | IN/OUT | passive | Second crystal terminal (IN/OUT) of the 12.000000 MHz crystal; the crystal is symmetric, so either IN/OUT pad may serve as either terminal. |
| 4 | GND | passive | Ground pad per the pin connection table; not connected to the crystal element in the internal connection drawing. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TST |
| Package | SMD2520-4P |
| 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 Range |  | -15 |  | 15 | ppm | Over operating temperature range, referred to the value at 25C | 3 |
| Frequency Make Tolerance (FL) | FL | -10 |  | 10 | ppm | @ 25C +/- 3C | 3 |
| Aging |  | -1 |  | 1 | ppm |  | 3 |
| Equivalent Series Resistance (ESR) | ESR |  |  | 180 |  |  | 3 |
| Shunt Capacitance (Co) | Co |  |  | 3 | pF |  | 3 |
| Nominal Drive Level |  |  | 10 | 100 | uW |  | 3 |
| Insulation Resistance |  | 500 |  |  | M | DC 100V | 3 |
| Operating Temperature Range |  | -30 |  | 85 | C |  | 3 |
| Storage Temperature Range |  | -40 |  | 125 | C |  | 3 |
| Nominal Frequency |  |  | 12 |  | MHz |  | 3 |
| Load Capacitance (CL) | CL |  | 12 |  | pF |  | 3 |

## CAD (KiCad official)

- Symbol: `TZ2094A`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `tz2094a-etched.step` / `tz2094a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tz2094a.step` / `tz2094a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TST datasheet](docs/tz2094a-datasheet.pdf) (8 pp, sha256 `6f409ff81886b939`, 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/tz2094a-datasheet.pdf)