PCA9536DGKR

@@ -0,0 +1,51 @@+# PCA9536DGKR++**Texas Instruments** · I/O Expanders · VSSOP-8-0.65mm++PCA9536DGKR from Texas Instruments, in a VSSOP-8-0.65mm. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | P0 | bidirectional | P-port bit 0, push-pull general-purpose I/O. Configurable as input or output via the Configuration register; output can sink up to 25 mA (100 mA total P-port) for direct LED drive. 5-V tolerant; powers up as input with weak pullup to VCC. |+| 2 | P1 | bidirectional | P-port bit 1, push-pull general-purpose I/O. Configurable as input or output; sinks up to 25 mA for LED drive. 5-V tolerant; powers up as input with weak pullup to VCC. |+| 3 | P2 | bidirectional | P-port bit 2, push-pull general-purpose I/O. Configurable as input or output; sinks up to 25 mA for LED drive. 5-V tolerant; powers up as input with weak pullup to VCC. |+| 4 | GND | power_in | Device ground reference. Continuous current through GND rated up to 200 mA (absolute max). |+| 5 | P3 | bidirectional | P-port bit 3, push-pull general-purpose I/O. Configurable as input or output; sinks up to 25 mA for LED drive. 5-V tolerant; powers up as input with weak pullup to VCC. |+| 6 | SCL | input | I2C serial clock input (up to 400 kHz fast mode). Open-drain bus line - requires external pullup resistor to VCC. |+| 7 | SDA | bidirectional | I2C serial data bus, bidirectional open-drain. Requires external pullup resistor to VCC. 5-V tolerant input. |+| 8 | VCC | power_in | Supply voltage input, 2.3 V to 5.5 V. Continuous current through VCC rated up to 160 mA (absolute max). Bypass locally with a decoupling capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VSSOP-8-0.65mm |+| Category | Interface |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `PCA9536DGKR`+- `PCA9536DGKRD`+- `PCA9536DGKRDR`++## CAD (KiCad official)++- Symbol: `PCA9536DGKR`+- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`+- 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/pca9536.pdf) (35 pp, sha256 `bc9e7a06865817ab`, 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/pca9536dgkr-datasheet.pdf)

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