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CY2305CSXC-1H
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Cypress Semicon Clock Generators / Frequency Synthesizers / PLL, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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CY2305CSXC-1H
Cypress Semicon · Clock Generators / Frequency Synthesizers / PLL · SOIC-8
CY2305CSXC-1H from Cypress Semicon, in a SOIC-8. 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 | REF | input | Input reference frequency pin with a weak pull-down; the PLL locks to the clock on this pin, which has a threshold of VDD/2. |
| 2 | CLK2 | output | Buffered clock output with a weak pull-down. |
| 3 | CLK1 | output | Buffered clock output with a weak pull-down. |
| 4 | GND | power_in | Ground supply pin. |
| 5 | CLK3 | output | Buffered clock output with a weak pull-down. |
| 6 | VDD | power_in | 3.3 V supply pin; operating supply voltage range is 3.0 V to 3.6 V. |
| 7 | CLK4 | output | Buffered clock output with a weak pull-down. |
| 8 | CLKOUT | output | Buffered clock output that also provides the internal PLL feedback; its load must equal the other outputs for zero delay. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Cypress Semicon |
| Package | SOIC-8 |
| Category | RTC/Clock Chip |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
CY2305CSXC-1H - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
cy2305csxc-1h-etched.step/cy2305csxc-1h-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cy2305csxc-1h.step/cy2305csxc-1h.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Cypress Semicon datasheet (22 pp, sha256
4c88d08d9298d52d, retrieved 2026-10-28, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# CY2305CSXC-1H
**Cypress Semicon** · Clock Generators / Frequency Synthesizers / PLL · SOIC-8
CY2305CSXC-1H from Cypress Semicon, in a SOIC-8. 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 | REF | input | Input reference frequency pin with a weak pull-down; the PLL locks to the clock on this pin, which has a threshold of VDD/2. |
| 2 | CLK2 | output | Buffered clock output with a weak pull-down. |
| 3 | CLK1 | output | Buffered clock output with a weak pull-down. |
| 4 | GND | power_in | Ground supply pin. |
| 5 | CLK3 | output | Buffered clock output with a weak pull-down. |
| 6 | VDD | power_in | 3.3 V supply pin; operating supply voltage range is 3.0 V to 3.6 V. |
| 7 | CLK4 | output | Buffered clock output with a weak pull-down. |
| 8 | CLKOUT | output | Buffered clock output that also provides the internal PLL feedback; its load must equal the other outputs for zero delay. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Cypress Semicon |
| Package | SOIC-8 |
| Category | RTC/Clock Chip |
| Pins | 8 |
## CAD (KiCad official)
- Symbol: `CY2305CSXC-1H`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `cy2305csxc-1h-etched.step` / `cy2305csxc-1h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cy2305csxc-1h.step` / `cy2305csxc-1h.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Cypress Semicon datasheet](docs/cy2305csxc-1h-datasheet.pdf) (22 pp, sha256 `4c88d08d9298d52d`, retrieved 2026-10-28, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/cy2305csxc-1h-datasheet.pdf)