# 8122S-26.480MQ33DTL

**HCI** · Temperature Compensated Crystal Oscillators (TCXOs) · SMD2520-4P

8122S-26.480MQ33DTL from HCI, 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 | GND/N.C. | power_in | Ground or no connection (datasheet lists 'GROUND GND or N.C.'); the datasheet does not state which applies to this MPN. |
| 2 | GND | power_in | Ground; the metal lid is connected to this ground pin 2. |
| 3 | OUTPUT | output | Clipped sine wave RF output, 0.8Vp-p minimum into a 10kΩ/10pF load. |
| 4 | VCC | power_in | Supply voltage Vcc; the datasheet lists 1.8V, 2.5V, 2.8V, 3.0V or 3.3V options, with supply current of 1.5mA / 2.0mA at 10kΩ/10pF. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HCI |
| Package | SMD2520-4P |
| Category | Resonators/Oscillators |
| 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 |  | 10 |  | 52 | MHz |  | 1 |
| Frequency tolerance (initial) |  | -2 |  | 2 | ppm | @+25°C | 1 |
| Frequency stability option ±0.5ppm |  | -0.5 |  | 0.5 | ppm | Over operating temperature range, referenced to +25°C; option not decoded from MPN | 1 |
| Frequency stability option ±1.0ppm |  | -1 |  | 1 | ppm | Over operating temperature range, referenced to +25°C; option not decoded from MPN | 1 |
| Frequency stability option 1.5ppm |  | -1.5 |  | 1.5 | ppm | Over operating temperature range, referenced to +25°C; printed without ± sign, symmetric sign assumed; option not decoded from MPN | 1 |
| Frequency stability option ±2.0ppm |  | -2 |  | 2 | ppm | Over operating temperature range, referenced to +25°C; option not decoded from MPN | 1 |
| Frequency stability option ±2.5ppm |  | -2.5 |  | 2.5 | ppm | Over operating temperature range, referenced to +25°C; option not decoded from MPN | 1 |
| Operating temperature range option A |  | -20 |  | 70 | °C | In combination with the above stabilities; option not decoded from MPN | 1 |
| Operating temperature range option B |  | -30 |  | 85 | °C | In combination with the above stabilities; option not decoded from MPN | 1 |
| Operating temperature range option C |  | -40 |  | 85 | °C | In combination with the above stabilities; option not decoded from MPN | 1 |
| Aging per year |  | -1 |  | 1 | ppm | @+25°C, per year | 1 |
| Output voltage level |  | 0.8 |  |  | Vp-p | Clipped sine wave, minimum | 1 |
| Supply current |  |  |  | 2 | mA | @10kΩ/10pF, frequency >26MHz (higher value); applies to 26.480MHz | 1 |
| Phase jitter RMS |  |  |  | 1 | ps | RMS, 12kHz≤Fj≤20MHz | 1 |

## CAD (KiCad official)

- Symbol: `8122S-26.480MQ33DTL`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `8122s-26-480mq33dtl-etched.step` / `8122s-26-480mq33dtl-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `8122s-26-480mq33dtl.step` / `8122s-26-480mq33dtl.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HCI datasheet](docs/8122s-26-480mq33dtl-datasheet.pdf) (1 pp, sha256 `0f281b2939e0aa6c`, retrieved 2026-10-29, 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/8122s-26-480mq33dtl-datasheet.pdf)