ABS07 32.768 kHz

@@ -0,0 +1,46 @@+# ABS07-32.768KHZ++**Abracon** · 32.768 kHz tuning-fork crystal · SMD 3.2x1.5mm++A 32.768 kHz tuning-fork quartz crystal in a compact 3.2 x 1.5 mm SMD can, the timebase behind real-time clocks and low-power timers. That odd frequency is exactly 2^15 Hz, so a 15-stage divider turns it into a clean 1 Hz tick, which is why every RTC (the DS1307, DS3231, and the RTC block in most MCUs) wants one on its XTAL pins. It is a two-terminal passive: connect it across the oscillator inputs with two small load capacitors sized for its 12.5 pF load. Its low frequency means microwatt oscillator power, ideal for coin-cell timekeeping.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | XTAL1 | passive | Crystal terminal 1. Connect to one leg of the oscillator circuit (typically to the OSC input/output pin of the host RTC/MCU) with the load capacitor to ground per CL = 12.5 pF specification. Non-polarized; terminals are interchangeable. |+| 2 | XTAL2 | passive | Crystal terminal 2. Connect to the other leg of the oscillator circuit with the matching load capacitor to ground. Non-polarized; interchangeable with pin 1. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Tuning-fork quartz crystal |+| Frequency | 32.768 kHz (2^15 Hz) |+| Frequency tolerance | ±20 ppm |+| Load capacitance | 12.5 pF |+| ESR | 70 kΩ max |+| Use | RTC / low-power clock timebase |+| Terminals | 2 (XTAL1, XTAL2) |+| Package | SMD 3.2 × 1.5 mm |++## Ordering variants++- `ABS07-32.768KHZ-T (3.2x1.5mm)`+- `ABS07-32.768KHZ-9-T (9 pF load)`++## CAD (KiCad official)++- Symbol: `Device:Crystal_Small`+- Footprint: `Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm`+- 3D model: SMD 3215 2-pin crystal (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Abracon datasheet](https://abracon.com/Resonators/ABS07.pdf) (6 pp, sha256 `5b21d42d9ca704d8`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/abs07-32768-datasheet.pdf)

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