# ECS-2520Q-18-260-BS-TR

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

ECS-2520Q-18-260-BS-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: output is active when high or not connected, and high impedance when low. |
| 2 | Gnd | power_in | Ground connection. |
| 3 | Output | output | HCMOS clock output driving 15 pF with VOL max 10% Vdd and VOH min 90% Vdd. |
| 4 | Vdd | power_in | Supply voltage of +1.8 V for this variant (code 18), Vdd ±5%. |

## 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 Stability (BS option) |  | -50 |  | 50 | ppm | -40 ~ +125°C (BS Opt); includes initial tolerance, temperature, supply voltage & load change, reflow frequency shift, and aging | 1 |
| Power Supply Tolerance | Vdd | -5 |  | 5 | % | Vdd ±5%, 1.8 V option | 1 |
| Current Consumption |  |  |  | 3 | mA | +1.8V, ~39.9 MHz column | 1 |
| Rise & Fall time |  |  |  | 10 | ns | 10%Vdd, 90%Vdd | 1 |
| Duty Cycle |  | 45 |  | 55 | % | @ ½ Vdd | 1 |
| Output voltage Level VOL | VOL |  |  | 10 | %Vdd | VOL:10%Vdd max. | 1 |
| Output voltage Level VOH | VOH | 90 |  |  | %Vdd | VOH:90%Vdd min. | 1 |
| Operating Temperature |  | -40 |  | 125 | °C |  | 1 |
| Storage Temperature |  | -55 |  | 125 | °C |  | 1 |
| Peak solder temperature |  |  |  | 260 | °C | 10 sec Max., 2 Cycles Max. | 2 |
| Nominal Frequency |  |  | 26 |  | MHz | Code 260 | 2 |
| Supply Voltage Nominal | Vdd |  | 1.8 |  | V DC | Code 18 | 1 |
| Output Load |  |  | 15 |  | pF | HCMOS | 1 |

## 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 DEVELOPED FREQUENCIES | 2 |

## CAD (KiCad official)

- Symbol: `ECS-2520Q-18-260-BS-TR`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `ecs-2520q-18-260-bs-tr-etched.step` / `ecs-2520q-18-260-bs-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ecs-2520q-18-260-bs-tr.step` / `ecs-2520q-18-260-bs-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ECS datasheet](docs/ecs-2520q-18-260-bs-tr-datasheet.pdf) (2 pp, sha256 `8dcca1142109a0d9`, retrieved 2026-10-30, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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-2520q-18-260-bs-tr-datasheet.pdf)