# 7Z38400005

**TXC Corp** · Temperature Compensated Crystal Oscillators (TCXOs) · SMD2016-4P

7Z38400005 from TXC Corp, 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 | AFC | input | Optional voltage-control (AFC) input giving a pull range of +7 to +16 ppm at VC = 2.5 V and -16 to -7 ppm at VC = 0.5 V (reference VC = 1.5 V). |
| 2 | GND | power_in | Ground connection; the test diagram routes it to ground. |
| 3 | OUTPUT | output | Clipped sinewave output with a minimum 0.8 Vp-p level into a 10 kΩ // 10 pF load, AC-coupled by a 1000 pF capacitor in the test circuit. |
| 4 | VCC | power_in | Supply voltage pin, 1.8 to 3.3 V (±5%) with maximum 2.0 mA supply current, and a 10 nF bypass capacitor (C1) should be placed. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TXC Corp |
| Package | SMD2016-4P |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Frequency | F | 10 |  | 52 | MHz | Fundamental | 1 |
| Frequency Tolerance |  | -2.5 |  | 2.5 | ppm | Note1. After 2 Times Reflow | 1 |
| Frequency Stability vs. Temp. |  | -2 |  | 2 | ppm | Note2. -40 ~ +85℃; printed ±0.5 ~ ±2.0 | 1 |
| Frequency Stability vs. Load |  | -0.2 |  | 0.2 | ppm | vs. Load (±5%) | 1 |
| Frequency Stability vs. Vdd |  | -0.2 |  | 0.2 | ppm | vs. Supply Voltage (±5%) | 1 |
| Operating Temperature | Topr | -40 | 25 | 85 | ℃ |  | 1 |
| Supply Voltage | Vdd | 1.8 |  | 3.3 | V | ±5% | 1 |
| Supply Current | Icc |  |  | 2 | mA |  | 1 |
| Output Load Resistance | RL | 9 | 10 | 11 | kΩ | Clipped Sinewave, RL // CL | 1 |
| Output Load Capacitance | CL | 9 | 10 | 11 | pF | Clipped Sinewave, RL // CL | 1 |
| Output Level | Vp-p | 0.8 |  |  | V | Clipped Sinewave | 1 |
| Symmetry (Duty Ratio) | TH/T | 40 |  | 60 | % |  | 1 |
| Start-up Time | Tosc |  |  | 5 | ms | To 90% of Final Amplitude | 1 |
| Harmonics |  |  |  | -5 | dBc |  | 1 |
| Slope over Temperature | ΔF/ΔT | -50 |  | 50 | ppb/℃ | -40 ~ +85 ℃ | 1 |
| Slope over Temperature | ΔF/ΔT | -100 |  | 100 | ppb/℃ | -40 ~ +105 ℃ | 1 |
| AFC Range (positive) | AFC | 7 |  | 16 | ppm | VC = 2.5 V | 2 |
| AFC Range (negative) | AFC | -16 |  | -7 | ppm | VC = 0.5 V | 2 |
| OE Input High Level | OE | 0.8 |  |  | x Vdd | Output Enable, Note 3; printed 0.8*Vdd | 2 |
| OE Input Low Level | OE |  |  | 0.2 | x Vdd | Output Disable; printed 0.2*Vdd | 2 |
| Aging | Aging | -1 |  | 1 | ppm | 1st Year, Note 4 | 2 |

## CAD (KiCad official)

- Symbol: `7Z38400005`
- Footprint: `Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm`
- 3D model: SMD2016-4P (KiCad packages3D, STEP)
- 3D model files: `7z38400005-etched.step` / `7z38400005-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `7z38400005.step` / `7z38400005.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TXC Corp datasheet](docs/7z38400005-datasheet.pdf) (2 pp, sha256 `3148998a19b1c9ca`, retrieved 2026-11-02, 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/7z38400005-datasheet.pdf)