PCA9548APWR

@@ -0,0 +1,73 @@+# PCA9548APWR++**Texas Instruments** · Interface - Specialized · TSSOP-24++PCA9548APWR from Texas Instruments, in a TSSOP-24. 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 | A0 | input | Hardware I2C address input 0. Tie directly to VCC or GND to set the LSB of the device address. Static logic input, no internal pull. |+| 2 | A1 | input | Hardware I2C address input 1. Tie directly to VCC or GND to set an address bit. Static logic input, no internal pull. |+| 3 | RESET | input | Active-low reset input. Pulling low (>=6 ns pulse) resets the I2C/SMBus state machine and deselects all channels. Tie to VCC through a pull-up resistor if unused. VIH >= 0.7*VCC. |+| 4 | SD0 | bidirectional | Channel 0 serial data. Downstream I2C SDA line for channel 0, open-drain. Connect to VCC through an external pull-up resistor; 5 V tolerant. |+| 5 | SC0 | bidirectional | Channel 0 serial clock. Downstream I2C SCL line for channel 0, open-drain. Connect to VCC through an external pull-up resistor; 5 V tolerant. |+| 6 | SD1 | bidirectional | Channel 1 serial data. Downstream I2C SDA line for channel 1, open-drain. Connect to VCC through an external pull-up resistor. |+| 7 | SC1 | bidirectional | Channel 1 serial clock. Downstream I2C SCL line for channel 1, open-drain. Connect to VCC through an external pull-up resistor. |+| 8 | SD2 | bidirectional | Channel 2 serial data. Downstream I2C SDA line for channel 2, open-drain. Connect to VCC through an external pull-up resistor. |+| 9 | SC2 | bidirectional | Channel 2 serial clock. Downstream I2C SCL line for channel 2, open-drain. Connect to VCC through an external pull-up resistor. |+| 10 | SD3 | bidirectional | Channel 3 serial data. Downstream I2C SDA line for channel 3, open-drain. Connect to VCC through an external pull-up resistor. |+| 11 | SC3 | bidirectional | Channel 3 serial clock. Downstream I2C SCL line for channel 3, open-drain. Connect to VCC through an external pull-up resistor. |+| 12 | GND | power_in | Ground reference for the device. Tie to system ground. |+| 13 | SD4 | bidirectional | Channel 4 serial data. Downstream I2C SDA line for channel 4, open-drain. Connect to VCC through an external pull-up resistor. |+| 14 | SC4 | bidirectional | Channel 4 serial clock. Downstream I2C SCL line for channel 4, open-drain. Connect to VCC through an external pull-up resistor. |+| 15 | SD5 | bidirectional | Channel 5 serial data. Downstream I2C SDA line for channel 5, open-drain. Connect to VCC through an external pull-up resistor. |+| 16 | SC5 | bidirectional | Channel 5 serial clock. Downstream I2C SCL line for channel 5, open-drain. Connect to VCC through an external pull-up resistor. |+| 17 | SD6 | bidirectional | Channel 6 serial data. Downstream I2C SDA line for channel 6, open-drain. Connect to VCC through an external pull-up resistor. |+| 18 | SC6 | bidirectional | Channel 6 serial clock. Downstream I2C SCL line for channel 6, open-drain. Connect to VCC through an external pull-up resistor. |+| 19 | SD7 | bidirectional | Channel 7 serial data. Downstream I2C SDA line for channel 7, open-drain. Connect to VCC through an external pull-up resistor. |+| 20 | SC7 | bidirectional | Channel 7 serial clock. Downstream I2C SCL line for channel 7, open-drain. Connect to VCC through an external pull-up resistor. |+| 21 | A2 | input | Hardware I2C address input 2. Tie directly to VCC or GND to set an address bit. Static logic input, no internal pull. |+| 22 | SCL | bidirectional | Upstream (master-side) I2C serial clock bus. Open-drain; connect to VCC through an external pull-up resistor. Supports up to 400 kHz. |+| 23 | SDA | bidirectional | Upstream (master-side) I2C serial data bus. Open-drain; connect to VCC through an external pull-up resistor. |+| 24 | VCC | power_in | Positive supply voltage input. Operating range 2.3 V to 5.5 V. Decouple locally to GND (typ. 0.1 uF). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-24 |+| Category | Interface |+| Pins | 24 |++## Ordering variants++Same part, different packaging or reel option.++- `PCA9548APWR`+- `PCA9548APWRDB`+- `PCA9548APWRDBR`+- `PCA9548APWRDGV`+- `PCA9548APWRDGVR`+- `PCA9548APWRDW`+- `PCA9548APWRDWR`+- `PCA9548APWRRGE`+- `PCA9548APWRRGER`++## CAD (KiCad official)++- Symbol: `PCA9548APWR`+- Footprint: `Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm`+- 3D model: TSSOP-24 (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/pca9548a.pdf) (45 pp, sha256 `b2238acf0fecd58c`, 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/pca9548apwr-datasheet.pdf)

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