# TZ1689A

**TST** · Crystals · SMD3225-4P

TZ1689A 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 | GND | power_in | Pin connection table lists #1 as GND; the datasheet notes the inner side of Pin#1 and Pin#4 is an XTAL blank mounting pad. |
| 2 | GND | power_in | Pin connection table lists #2 as GND. |
| 3 | IN/OUT | passive | Crystal terminal, listed as IN/OUT in the pin connection table, for the 26 MHz fundamental-mode crystal with 7.3 pF load capacitance. |
| 4 | GND | power_in | Pin connection table lists #4 as GND; the datasheet notes the inner side of Pin#1 and Pin#4 is an XTAL blank mounting pad. |

## 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) |  | -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 |
| Frequency perturbation |  | -1 |  | 1 | ppm |  | 3 |
| Equivalent series resistance (ESR) | ESR |  |  | 30 | Ω |  | 3 |
| Shunt capacitance (Co) | Co |  |  | 3 | pF |  | 3 |
| Drive level dependence, Delta R | Delta R |  |  | 1.8 | Ω | 8 drive levels (0.00003, 0.0003, 0.003, 0.03, 0.3, 3, 50, 100 uW) | 3 |
| Drive level dependence, Delta F | Delta F |  |  | 2 | ppm | 8 drive levels (0.00003, 0.0003, 0.003, 0.03, 0.3, 3, 50, 100 uW) | 3 |
| Insulation resistance |  | 500 |  |  | MΩ | DC 100V | 4 |
| Operating temperature range |  | -20 |  | 75 | °C |  | 3 |
| Storage temperature range |  | -40 |  | 85 | °C | Storage | 3 |
| Nominal drive level |  |  | 100 | 200 | uW |  | 3 |
| Motional capacitance tolerance | C1 | -15 |  | 15 | % |  | 3 |
| Pulling sensitivity tolerance |  | -10 |  | 10 | % | @7.3pF Load | 3 |
| Motional capacitance (C1) | C1 |  | 4.4 |  | fF |  | 3 |
| Pulling sensitivity |  |  | 32 |  | ppm/pF | @7.3pF Load | 3 |
| Load capacitance (CL) | CL |  | 7.3 |  | pF |  | 3 |
| Nominal frequency |  |  | 26 |  | MHz |  | 3 |

## CAD (KiCad official)

- Symbol: `TZ1689A`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `tz1689a-etched.step` / `tz1689a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tz1689a.step` / `tz1689a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TST datasheet](docs/tz1689a-datasheet.pdf) (7 pp, sha256 `add70efa7a8a0a71`, 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/tz1689a-datasheet.pdf)