# ECS-384-CDX-1983

**ECS** · Crystals · SMD2016-4P

ECS-384-CDX-1983 from ECS, in a SMD2016-4P. 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 | XTAL1 | passive | Crystal terminal 1, connected to one side of the quartz element (38.400000 MHz, CL 10 pF). |
| 2 | GND | power_in | Grounded to the metal lid per the package drawing note (#2 & #4 grounded to metal lid). |
| 3 | XTAL2 | passive | Crystal terminal 2, connected to the other side of the quartz element (38.400000 MHz, CL 10 pF). |
| 4 | GND | power_in | Grounded to the metal lid per the package drawing note (#2 & #4 grounded to metal lid). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ECS |
| Package | SMD2016-4P |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating Temperature Range | Topt | -40 |  | 125 | ℃ |  | 3 |
| Storage Temperature Range | Tstg | -55 |  | 125 | ℃ |  | 3 |
| Tolerance | dF/Fo | -10 |  | 10 | ppm | Refer to Center Frequency @25±3℃ | 3 |
| Stability Over Temperature | dF/F25 | -40 |  | 40 | ppm | Refer to Operating Temperature | 3 |
| Aging | dF/F25 | -1 |  | 1 | ppm | First Year | 3 |
| Load Capacitance | CL |  | 10 |  | pF |  | 3 |
| Drive Level | DL |  | 100 |  | µW |  | 3 |
| Nominal Frequency |  |  | 38.4 |  | MHz |  | 3 |
| Equivalent Series Resistance | ESR |  | 40 |  | Ω | @Series | 4 |
| Shunt Capacitance | C0 |  | 1.5 |  | pF |  | 4 |
| Insulation Resistance | IR |  | 500 |  | MΩ | @DC 100 Volt | 4 |

## CAD (KiCad official)

- Symbol: `ECS-384-CDX-1983`
- Footprint: `Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm`
- 3D model: SMD2016-4P (KiCad packages3D, STEP)
- 3D model files: `ecs-384-cdx-1983-etched.step` / `ecs-384-cdx-1983-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ecs-384-cdx-1983.step` / `ecs-384-cdx-1983.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ECS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589984360255959040) (8 pp, sha256 `7a08aa79e131c544`, retrieved 2026-10-15, 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/ecs-384-cdx-1983-datasheet.pdf)