# ECS-2520S33-120-FN-TR

**ECS** · Pre-ordered Products · SMD2520-4P

ECS-2520S33-120-FN-TR from ECS, 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 | Tri-state | input | Tri-state control: the output is active when this pin is High or NC, and goes to high impedance when this pin is Low. |
| 2 | Gnd | power_in | Ground connection for the oscillator. |
| 3 | Output | output | HCMOS clock output driving 15 pF; VOL is 10% Vdd max and VOH is 90% Vdd min, with 5 ns max rise and fall time (10%-90% Vdd). |
| 4 | Vdd | power_in | Supply voltage, Vdd ±10% of +1.8, +2.5, +3.0 or +3.3 V DC depending on the ordered voltage code. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ECS |
| Package | SMD2520-4P |
| Category | Electronic Tools/Instruments/Consumables |
| 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 range |  | 3.2 |  | 55 | MHz |  | 1 |
| Frequency stability FN |  | -10 |  | 10 | ppm | FN (-40 ~ +85°C) | 1 |
| Supply voltage Vdd (33 = 3.3 V variant) | Vdd |  | 3.3 |  | V | DC | 1 |
| Supply voltage tolerance | Vdd | -10 |  | 10 | % | ±10% | 1 |
| Output voltage low | VOL |  |  | 10 | %Vdd |  | 1 |
| Output voltage high | VOH | 90 |  |  | %Vdd |  | 1 |
| Duty cycle |  | 45 |  | 55 | % | @ ½ Vdd | 1 |
| Current consumption |  |  |  | 7 | mA |  | 1 |
| Standby current |  |  |  | 10 | µA |  | 1 |
| Rise and fall time |  |  |  | 5 | ns | 10%Vdd, 90%Vdd | 1 |
| Startup time |  |  |  | 10 | ms |  | 1 |
| Phase noise |  |  | -145 |  | dBc/Hz | @ 10 KHz offset | 1 |
| Operating temperature |  | -40 |  | 85 | °C |  | 1 |
| Storage temperature |  | -55 |  | 125 | °C |  | 1 |
| Output load (HCMOS) |  |  | 15 |  | pF | HCMOS | 1 |
| Nominal frequency (code 120) |  |  | 12 |  | MHz |  | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | gold | MSL 1, Lead Finish Au FREQUENCY MHz CODE | 2 |

## CAD (KiCad official)

- Symbol: `ECS-2520S33-120-FN-TR`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `ecs-2520s33-120-fn-tr-etched.step` / `ecs-2520s33-120-fn-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ecs-2520s33-120-fn-tr.step` / `ecs-2520s33-120-fn-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ECS datasheet](docs/ecs-2520s33-120-fn-tr-datasheet.pdf) (2 pp, sha256 `56d1dfee00e96193`, retrieved 2026-10-30, 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/ecs-2520s33-120-fn-tr-datasheet.pdf)