tca9554pwr

@@ -0,0 +1,61 @@+# TCA9554PWR++**Texas Instruments** · I/O Expanders · TSSOP-16++TCA9554PWR from Texas Instruments, in a TSSOP-16. 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 slave-address select bit 0. Must be tied directly to VCC or GND (not left floating). Combines with A1/A2 to form the lower 3 bits of the 7-bit slave address, allowing up to 8 TCA9554 devices on one bus. |+| 2 | A1 | input | Hardware I2C slave-address select bit 1. Must be tied directly to VCC or GND. Combines with A0/A2 to form the lower 3 bits of the 7-bit slave address. |+| 3 | A2 | input | Hardware I2C slave-address select bit 2. Must be tied directly to VCC or GND. Combines with A0/A1 to form the lower 3 bits of the 7-bit slave address. |+| 4 | P0 | bidirectional | P-port bidirectional I/O, bit 0. Push-pull output structure. Configured as an input at power-up. Sinks up to 25 mA (Tj ≤ 65 °C) for direct LED drive; sources up to 10 mA per pin (80 mA total across P0-P7). 5 V-tolerant input. |+| 5 | P1 | bidirectional | P-port bidirectional I/O, bit 1. Push-pull output. Configured as an input at power-up. Same drive/sink limits as P0. |+| 6 | P2 | bidirectional | P-port bidirectional I/O, bit 2. Push-pull output. Configured as an input at power-up. Same drive/sink limits as P0. |+| 7 | P3 | bidirectional | P-port bidirectional I/O, bit 3. Push-pull output. Configured as an input at power-up. Same drive/sink limits as P0. |+| 8 | GND | power_in | Ground reference. Total continuous current sunk through GND by all P-ports plus INT and SDA is limited to 200 mA (250 mA absolute max). |+| 9 | P4 | bidirectional | P-port bidirectional I/O, bit 4. Push-pull output. Configured as an input at power-up. Same drive/sink limits as P0. |+| 10 | P5 | bidirectional | P-port bidirectional I/O, bit 5. Push-pull output. Configured as an input at power-up. Same drive/sink limits as P0. |+| 11 | P6 | bidirectional | P-port bidirectional I/O, bit 6. Push-pull output. Configured as an input at power-up. Same drive/sink limits as P0. |+| 12 | P7 | bidirectional | P-port bidirectional I/O, bit 7. Push-pull output. Configured as an input at power-up. Same drive/sink limits as P0. |+| 13 | INT | output | Open-drain active-low interrupt output. Asserts when any P-port input changes state versus the Input Port register; requires an external pull-up to VCC. Sinks up to 7 mA (VOL = 0.4 V). |+| 14 | SCL | input | I2C serial clock bus input. Requires an external pull-up to VCC. Supports Standard-mode (100 kHz) and Fast-mode (400 kHz). VIH = 0.7 × VCC. |+| 15 | SDA | bidirectional | I2C serial data bus, bidirectional open-drain. Requires an external pull-up to VCC. Sinks up to 11 mA (VOL = 0.4 V). Supports 100 kHz / 400 kHz operation. |+| 16 | VCC | power_in | Supply voltage, 1.65 V to 5.5 V (absolute max 6 V). Decouple with a local bypass capacitor to GND. Total continuous current through VCC (all P-ports high) is limited to 80 mA (160 mA absolute max). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Interface |+| Pins | 16 |++## Ordering variants++- `TCA9554PWR`+- `TCA9554PWRDB`+- `TCA9554PWRDBR`+- `TCA9554PWRDBQ`+- `TCA9554PWRDBQR`+- `TCA9554PWRDW`+- `TCA9554PWRDWR`++## CAD (KiCad official)++- Symbol: `TCA9554PWR`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (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/tca9554.pdf) (None pp, sha256 `efce888fff720618`, 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/tca9554pwr-datasheet.pdf)

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