TCA4307DGKR

@@ -0,0 +1,52 @@+# TCA4307DGKR++**Texas Instruments** · Signal Buffers, Repeaters, Splitters · MSOP-8++TCA4307DGKR from Texas Instruments, in a MSOP-8. 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 | EN | input | Active-high chip enable. When low, the device enters low-current mode, disables rise-time accelerators and pre-charge, drives READY low, and isolates SDAIN/SCLIN from SDAOUT/SCLOUT. Tie to VCC for normal operation if not used. VIH >= 0.7*VCC, VIL <= 0.3*VCC. |+| 2 | SCLOUT | bidirectional | Serial clock output to the card-side I2C bus. Open-drain, requires a pull-up resistor. Isolated from SCLIN until EN is high and start-up is complete. |+| 3 | SCLIN | bidirectional | Serial clock input from the backplane-side I2C bus. Open-drain, requires a pull-up resistor. Pre-charged to 1 V during insertion to minimize glitching. |+| 4 | GND | power_in | Device ground reference. |+| 5 | READY | output | Open-drain connection flag / rise-time accelerator control. Low when EN is low or during start-up; goes high when EN is high, start-up is complete, and the two bus sides are connected. Connect a ~10 kOhm pull-up to VCC. IOL = 3 mA, VOL <= 0.4 V. |+| 6 | SDAIN | bidirectional | Serial data input from the backplane-side I2C bus. Open-drain, requires a pull-up resistor. Pre-charged to 1 V during live insertion. |+| 7 | SDAOUT | bidirectional | Serial data output to the card-side I2C bus. Open-drain, requires a pull-up resistor. Isolated from SDAIN until EN is high and start-up is complete. |+| 8 | VCC | power_in | Main input supply from the backplane, 2.3 V to 5.5 V. Sets the supply voltage for the backplane-side I2C devices and the internal pull-ups from SDAOUT/SCLOUT. Place a 0.1 uF bypass capacitor close to this pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | MSOP-8 |+| Category | Comm/UART |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `TCA4307DGKR`+- `TCA4307DGKRDGKT`+- `TCA4307DGKRDRGR`+- `TCA4307DGKRDRGT`++## CAD (KiCad official)++- Symbol: `TCA4307DGKR`+- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`+- 3D model: MSOP-8 (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/tca4307.pdf) (29 pp, sha256 `904278fd916371ef`, 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/tca4307dgkr-datasheet.pdf)

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