# ECS-TXO-2520-33-250-AN-TR

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

ECS-TXO-2520-33-250-AN-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: High or NC gives active output, Low disables the output to Hi-Z. |
| 2 | Gnd | power_in | Ground connection. |
| 3 | Output | output | HCMOS clock output, 15 pF load, VOL 10%Vdd max / VOH 90%Vdd min. |
| 4 | Vdd | power_in | Supply voltage pin, +2.5, +2.8 or +3.3 V DC ±10% as specified in the part number. |

## 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 |  |  | 25 |  | MHz | Frequency code 250 | 2 |
| Frequency Range |  | 3.2 |  | 55 | MHz |  | 1 |
| Frequency Tolerance at +25°C |  | -2 |  | 2 | ppm | Tolerance at +25°C | 1 |
| Frequency Stability vs Temperature |  | -2.5 |  | 2.5 | ppm | -40 ~ +85°C | 1 |
| Frequency Change vs Supply Voltage |  | -0.2 |  | 0.2 | ppm | Vdd ±5% | 1 |
| Frequency Change vs Load |  | -0.2 |  | 0.2 | ppm | Load change (±10%) | 1 |
| Aging |  | -1 |  | 1 | ppm | Per year @ +25°C | 1 |
| Supply Voltage | Vdd | -10 | 3.3 | 10 | % | +3.3 V DC ±10% | 1 |
| Current Consumption |  |  |  | 5.5 | mA | +3.3V, 20.1~30 MHz | 1 |
| Standby Current |  |  |  | 10 | µA |  | 1 |
| Output Load |  |  | 15 |  | pF | HCMOS | 1 |
| Output Low Voltage | VOL |  |  | 10 | %Vdd |  | 1 |
| Output High Voltage | VOH | 90 |  |  | %Vdd |  | 1 |
| Rise & Fall Time |  |  |  | 5 | ns | 10%Vdd, 90%Vdd | 1 |
| Duty Cycle |  | 45 |  | 55 | % | @ ½ Vdd | 1 |
| Phase Noise |  |  | -145 |  | dBc/Hz | @ 10 KHz offset | 1 |
| Operating Temperature |  | -40 |  | 85 | °C | N = -40 ~ +85°C | 1 |
| Peak Solder Temperature |  |  |  | 260 | °C | Max 10 sec, 2 cycles max | 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 ABBREVIATIONS | 2 |

## CAD (KiCad official)

- Symbol: `ECS-TXO-2520-33-250-AN-TR`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `ecs-txo-2520-33-250-an-tr-etched.step` / `ecs-txo-2520-33-250-an-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ecs-txo-2520-33-250-an-tr.step` / `ecs-txo-2520-33-250-an-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ECS datasheet](docs/ecs-txo-2520-33-250-an-tr-datasheet.pdf) (2 pp, sha256 `ff95b59ff8d90046`, 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-txo-2520-33-250-an-tr-datasheet.pdf)